Structural and Electronic properties of platinum nanoparticles studied by diffraction and absorption spectroscopy
|
|
- Brianna Ellis
- 5 years ago
- Views:
Transcription
1 The 4 th SUNBEAM Workshop Structural and Electronic properties of platinum nanoparticles studied by in situ x-ray x diffraction and in situ x-ray x absorption spectroscopy Hideto Imai Fundamental and Environmental Research Laboratories NEC Corporation
2 Micro Fuel Cells Portable batteries in the Ubiquitous Networking Society Potential successor to Li - ion batteries Higher energy capacity Longer usage period Smaller size Instantly rechargeable Fuel (Methanol or hydrogen) Anode catalysts Proton conducting membrane CO CH 3 OH + H O CO + 6H + + 6e - H + Cathode catalysts O + + 4H + + 4e - H O e - Fuel cell-powered laptop computer (A prototype) Air (O ) H O
3 Technological hurdles Energy Loss at the cathode electrode Cathode Reaction Oxygen Reduction Reaction Cathode 1. O + 4H + + 4e - = H O E 0 = 1.3 V Catalytic activity of the current catalyst (Pt) is not enough Potential (V) Cell Voltage (PEFCs) Voltage loss at cathode Cell Voltage (DMFCs) Elucidation of ORR mechanism Surface morphology Anode Intermediate species Electronic state of platinum 0. H H H+ + e - CH OH + H 3 O CO + 6H+ + 6e - Current density (A/cm ) Current vs. Voltage (Polarization) curve for PEFCs and DMFCs
4 Stability of platinum in aqueous systems Fuel cell operating region Hydrogen adsorption Double layer Oxide formation.0 Potential (V) PtO 3 O +4H + +4e - =H O PtO Pt PtO or Pt(OH) H + +e - =H Current (A) - Pt-H Pt Pt-OH? H + + e - H Pt-O? H O O + 4H + + 4e ph x10 - Potential (V vs. RHE) 1.5 The potential - ph equilibrium diagram for the system platinum - water Cyclic voltammogram for carbon supported platinum nanoparticles in M H SO 4
5 In situ XRD and XAFS measurements Platinum nanoparticles (supported on a carbon) ca. 3 nm, 50 wt% - Pt loading Potential control Home made three electrode electrochemical cell M H SO 4 electrolyte Potentiostatic mode In situ XRD BL16XU Photon energy 30 kev ( λ = 41nm ) Transmission mode, Imaging plate In situ XAFS BL16B L 3 and L absorption edges Transmission mode
6 In situ x-ray diffraction 10x x10 6 Intensity (a.u.) (111) (00) (0) V vs. RHE 0.4 V 0.7 V 0.9 V V 1. V 1.4 V Pt (bulk) PtO (bulk) (311) Intensity (a.u.) V vs. RHE 0.4 V 0.7 V 0.9 V V 1. V 1.4 V Pt (bulk) PtO (bulk) (111) V, V (00) PtO PtO () PtO θ (degree) θ (degree) 1 The potential dependence of x-ray diffraction patterns for carbon supported platinum nanoparticles
7 In situ x-ray absorption spectroscopy L 3 absorption edge L absorption edge Absorption (a.u.) 1.5 V vs. RHE V Absorption (a.u.) V vs. RHE V Photon Energy (kev) Photon Energy (kev) The potential dependence of XAS spectra at the L 3 absorption edge The potential dependence of XAS spectra at the L absorption edge
8 Fourier transform of Pt L 3 EXAFS Fourier Fourier Transform Transform V vs. RHE V Pt-O Pt-O Pt-Pt Pt-Pt V vs. RHE V Fourier Transform Pt-O Pt-Pt V vs. RHE V R (Å) R (Å) The k 3 -weighted Fourier transform of Pt L 3 EXAFS The k-weighted Fourier transform of Pt L 3 EXAFS
9 Structural models for the platinum nanoparticle surface ~ 0.7 V Clean Pt surface (Double layer region) Surface reconstruction cf. Pt-O distance.58å (bulk PtO ) on-top site Pt-OH ~.0Å hollow site Pt-O ~.06Å 1.1 ~ 1.4 V Amorphous like PtO x (several layers) 0.8 ~ V Irreversible OH (or atomic O) adsorption bridge site Pt-OH ~.6Å
10 XANES spectra 1. Absorption (a.u.) 1.5 V vs. RHE V Absorption (a.u.) V vs. RHE V Photon Energy (kev) Photon Energy (kev) The potential dependence of XANES spectra at the L 3 absorption edge The potential dependence of XANES spectra at the L absorption edge
11 L 3 and L absorptions in platinum E Conduction band The fractional change in the number of unoccupied d states from that of bulk Pt E F 5d 5/ Spin-orbit coupling 1.6 ev 5d 3/ f d = h T h TPt = ( A Α ) (A Α ) Pt h T = ( 1 + f d ) h TPt L 3 p 3/ L p 1/ A i : edge area for the i th edge A i = A isample -A ipt h T : total number of unoccupied d states h T = h Tsample h TPt h TPt = 0.30 (tight-binding + spin-orbit coupling)
12 Electronic states Unoccupied states in platinum 5d5 orbitals Pt 5d unoccupied states bulk platinum Potential (vs. RHE) 1.5 8x Current (A) Q (C) V 6V Surface oxidation Pt-H PtO x Hydrogen adsorption V Pt-OH Potential (V vs. RHE) The potential dependence of unoccupied states in platinum 5d orbitals The total charge due to the hydrogen adsorption and the surface oxide formation estimated from the cyclic voltammogram
13 Summary In situ XRD and XAFS studies clearly showed the followings : In the oxygen reduction reaction potential region. Surface reconstruction, adsorption of oxygen species, and formation of platinum oxides Irreversible OH adsorption (0.8 ~ V) Pt-OH at on-top site Pt-O O at 3 fold or 4 fold hollow sites Surface oxide formation (1.1 ~ 1.4 V) amorphous like PtO x (several layers) Charge transfer from platinum The number of unoccupied states in Pt 5d5 orbitals linearly depends on the potential and the coverage of oxygen species The formation of surface oxygen species may significantly reduce the catalytic activity of platinum on oxygen reduction reaction
Nanostructured Ti 0.7 Mo 0.3 O 2 Support Enhances Electron Transfer to Pt : High-Performance Catalyst for Oxygen Reduction Reaction
Nanostructured Ti 0.7 Mo 0.3 O 2 Support Enhances Electron Transfer to Pt : High-Performance Catalyst for Oxygen Reduction Reaction Seonbaek Ha Professor : Carlo U. Segre 12. 06. 2013 Department of Chemical
More informationSupporting Information
Supporting Information Synchrotron-Based In Situ Characterization of Carbon-Supported Platinum and Platinum Monolayer Electrocatalysts Kotaro Sasaki 1*, Nebojsa Marinkovic 2, Hugh S. Isaacs 1, Radoslav
More informationSupplementary Figure S1: Particle size distributions of the Pt ML /Pd 9 Au 1 /C
a 2 15 before cycle test mean particle size: 3.8 ± 1.2 nm b 2 15 after.6v - 1.V 1k cycle test mean particle size: 4.1 ± 1.5 nm Number 1 total number: 558 Number 1 total number: 554 5 5 1 2 3 4 5 6 7 8
More informationSupporting information. Stability Issues in Pd-based Catalysts: The Role of Surface Pt in Improving the Stability
Supporting information Stability Issues in Pd-based Catalysts: The Role of Surface Pt in Improving the Stability and Oxygen Reduction Reaction (ORR) Activity R. K. Singh, R. Rahul, M. Neergat 1 Department
More informationOxygen Reduction Reaction
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2016 Oxygen Reduction Reaction Oxygen is the most common oxidant for most fuel cell cathodes simply
More informationSupporting Information. Oxygen reduction and methanol oxidation behaviour of SiC based Pt. nanocatalysts for proton exchange membrane fuel cells
Supporting Information Oxygen reduction and methanol oxidation behaviour of SiC based Pt nanocatalysts for proton exchange membrane fuel cells Rajnish Dhiman a *, Serban N. Stamatin a, Shuang M. Andersen
More informationIntroductory Lecture: Principle and Applications of Fuel Cells (Methanol/Air as Example)
3 rd LAMNET Workshop Brazil -4 December 00 3 rd LAMNET Workshop Brazil 00 Introductory Lecture: Principle and Applications of Fuel Cells (Methanol/Air as Example) Prof. Dr. Wolf Vielstich University of
More informationTemplated electrochemical fabrication of hollow. molybdenum sulfide micro and nanostructures. with catalytic properties for hydrogen production
Supporting Information Templated electrochemical fabrication of hollow molybdenum sulfide micro and nanostructures with catalytic properties for hydrogen production Adriano Ambrosi, Martin Pumera* Division
More informationSupplementary Figure 1 Nano-beam electron diffraction Nano-beam electron diffraction
Supplementary Figure 1 Nano-beam electron diffraction Nano-beam electron diffraction (NBED) patterns of different Pd-W nanoparticles on OMCs (Pd-W/OMCs), all exhibiting a body-centered cubic (bcc) microstructure.
More informationIntegrated Electrocatalytic Processing of Levulinic Acid and Formic Acid to Biofuel Intermediate Valeric Acid. Support Information
Integrated Electrocatalytic Processing of Levulinic Acid and Formic Acid to Biofuel Intermediate Valeric Acid Yang Qiu a, Le Xin a, David J. Chadderdon a, Ji Qi a, Changhai Liang b, Wenzhen Li* a a Department
More informationSupplementary Figure 1. TEM analysis of Co0.5 showing (a) a SAED pattern, and (b-f) bright-field images of the microstructure. Only two broad rings
Supplementary Figure 1. TEM analysis of Co0.5 showing (a) a SAED pattern, and (bf) brightfield images of the microstructure. Only two broad rings were observed in the SAED pattern, as expected for amorphous
More information17.1 Redox Chemistry Revisited
Chapter Outline 17.1 Redox Chemistry Revisited 17.2 Electrochemical Cells 17.3 Standard Potentials 17.4 Chemical Energy and Electrical Work 17.5 A Reference Point: The Standard Hydrogen Electrode 17.6
More informationEffect of Chloride Anions on the Synthesis and. Enhanced Catalytic Activity of Silver Nanocoral
Supporting Information Effect of Chloride Anions on the Synthesis and Enhanced Catalytic Activity of Silver Nanocoral Electrodes for CO 2 Electroreduction Polyansky* Yu-Chi Hsieh, Sanjaya D. Senanayake,
More informationSupplementary Figure 1 Morpholigical properties of TiO 2-x SCs. The statistical particle size distribution (a) of the defective {001}-TiO 2-x SCs and
Supplementary Figure 1 Morpholigical properties of TiO 2-x s. The statistical particle size distribution (a) of the defective {1}-TiO 2-x s and their typical TEM images (b, c). Quantity Adsorbed (cm 3
More informationSupporting information. Fuel Cells Fabricated by A Selective Electrochemical Sn Deposition Method
Supporting information Surface-regulated Nano-SnO2/Pt3Co/C Cathode Catalysts for Polymer Electrolyte Fuel Cells Fabricated by A Selective Electrochemical Sn Deposition Method Kensaku Nagasawa a, Shinobu
More informationPorous silicon as base material of MEMS-compatible fuel cell components
Porous silicon as base material of MEMS-compatible fuel cell components José Geraldo Alves Brito Neto Tokyo University of Science - Faculty of Science and Technology Department of Mechanical Engineering
More informationSupporting Information
Electronic Supplementary Material (ESI) for Chemical Science. This journal is The Royal Society of Chemistry 2018 Supporting Information The chemical identity, state and structure of catalytically active
More informationSupplemental Information. In Situ Electrochemical Production. of Ultrathin Nickel Nanosheets. for Hydrogen Evolution Electrocatalysis
Chem, Volume 3 Supplemental Information In Situ Electrochemical Production of Ultrathin Nickel Nanosheets for Hydrogen Evolution Electrocatalysis Chengyi Hu, Qiuyu Ma, Sung-Fu Hung, Zhe-Ning Chen, Daohui
More informationSupporting Information
Supporting Information High Performance Electrocatalyst: Pt-Cu Hollow Nanocrystals Xiaofei Yu, a Dingsheng, a Qing Peng a and Yadong Li* a a Department of Chemistry, Tsinghua University, Beijing, 100084
More informationSupporting Information
Electronic Supplementary Material (ESI) for CrystEngComm. This journal is The Royal Society of Chemistry 217 Supporting Information Catalyst preparation A certain of aqueous NiCl 2 6H 2 O (2 mm), H 2 PtCl
More informationX-ray Absorption at the Near-edge and Its Applications
X-ray Absorption at the Near-edge and Its Applications Faisal M Alamgir faisal@msegatechedu School of Materials Science and Engineering, Georgia Institute of Technology Cartoon of XAS ln(i 0 /I t ) or
More informationFuel Cells in Energy Technology. Tutorial 5 / SS solutions. Prof. W. Schindler, Jassen Brumbarov / Celine Rüdiger
Fuel Cells in Energy Technology Tutorial 5 / SS 2013 - solutions Prof. W. Schindler, Jassen Brumbarov / Celine Rüdiger 05.06.2013 Homework 3: What hydrogen flow rate (g/hour) is required to generate 1
More informationElectrochemical Cells
CH302 LaBrake and Vanden Bout Electrochemical Cells Experimental Observations of Electrochemical Cells 1. Consider the voltaic cell that contains standard Co 2+ /Co and Au 3+ /Au electrodes. The following
More informationAn extraordinarily stable catalyst: Pt NPs supported on two-dimensional Ti 3 C 2 X 2 (X=OH, F) nanosheets for Oxygen Reduction Reaction
An extraordinarily stable catalyst: Pt NPs supported on two-dimensional Ti 3 X 2 (X=OH, F) nanosheets for Oxygen Reduction Reaction Xiaohong Xie, Siguo Chen*, Wei Ding, Yao Nie, and Zidong Wei* Experimental
More informationZirconium Oxynitride Catalyzed Oxygen Reduction. Reaction at Polymer Electrolyte Fuel Cell Cathodes
Supporting Information Zirconium Oxynitride Catalyzed Oxygen Reduction Reaction at Polymer Electrolyte Fuel Cell Cathodes Mitsuharu Chisaka, *, Akimitsu Ishihara,, Hiroyuki Morioka, # Takaaki Nagai, Shihong
More informationMAE 214 FUEL CELL FUNDAMENTALS & TECHNOLOGY FC ANALYSES TECHNIQUES
MAE 214 FUEL CELL FUNDAMENTALS & TECHNOLOGY Fuel Cell Analyses Methods NFCRC DR. JACK BROUWER MAE 214 Lecture #11 Spring, 2005 FC ANALYSES TECHNIQUES Potential Sweep Methods Linear Sweep Voltammetry (I-V)
More informationFuel Cell Activities in MME Waterloo
Fuel Cell Activities in MME Waterloo Xianguo Li and Roydon Fraser Fuel Cells and Green Energy Research Group Department of Mechanical & Mechatronics Engineering University of Waterloo, Waterloo, Ontario,
More informationLeveraging Commercial Silver Inks as Oxidation Reduction Reaction Catalysts in Alkaline Medium
Supporting Information Leveraging Commercial Silver Inks as Oxidation Reduction Reaction Catalysts in Alkaline Medium Shlomi Polani, Naftali Kanovsky and David Zitoun, *, Bar Ilan University, Department
More informationSupporting Information
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Supporting Information Title: A sulfonated polyaniline with high density and high rate Na-storage
More informationSupporting Information
Supporting Information Enhanced Electrocatalytic Performance for Oxygen Reduction via Active Interfaces of Layer-By-Layered Titanium Nitride / Titanium Carbonitride Structures Zhaoyu Jin, 1 Panpan Li,
More informationIntroduction Fuel Cells Repetition
Introduction Fuel Cells Repetition Fuel cell applications PEMFC PowerCell AB, (S1-S3) PEMFC,1-100 kw Toyota Mirai a Fuel Cell Car A look inside The hydrogen tank 1. Inside Layer of polymer closest to the
More informationXAFS Analysis for Calcination Process of Supported Mn Catalysts on Silica
XAFS Analysis for Calcination Process of Supported Mn Catalysts on Silica Kazutaka Furusato, Misaki Katayama, and Yasuhiro Inada Department of Applied Chemistry, Graduate School of Life Sciences, Ritsumeikan
More informationRedox reactions Revision galvanic cells and fuel cells Lesson 7 Revise fuel cells by visiting the link below. www.dynamicscience.com.au/tester/solutions1/chemistry/redox/fuelcl.html 1) A fuel cell uses
More informationX-ray absorption spectroscopy
X-ray absorption spectroscopy Jagdeep Singh Jeroen A. van Bokhoven Absorption as function of energy of the x-ray Data-analysis Absorption (a.u.) 2.0 Pre-edge subtraction 1.5 1.0 0.5 0.0-0.5 8800 9000 9200
More informationSimple synthesis of urchin-like Pt-Ni bimetallic nanostructures as enhanced electrocatalysts for oxygen reduction reaction
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Electronic Supplementary Information Simple synthesis of urchin-like Pt- bimetallic nanostructures
More informationFigure 1. Contact mode AFM (A) and the corresponding scanning Kelvin probe image (B) of Pt-TiN surface.
Synopsis Synopsis of the thesis entitled Titanium Nitride-ased Electrode Materials for Oxidation of Small Molecules: pplications in Electrochemical Energy Systems submitted by Muhammed Musthafa O. T under
More informationA Robust and Highly Active Copper-Based Electrocatalyst. for Hydrogen Production at Low Overpotential in Neutral
Electronic Supplementary Material (ESI) for ChemComm. This journal is The Royal Society of Chemistry 2015 Supporting information A Robust and Highly Active Copper-Based Electrocatalyst for Hydrogen Production
More informationGeneration of Hydrogen Peroxide In ORR Over Low Loadings of Pt/C Catalysts
Generation of Hydrogen Peroxide In ORR Over Low Loadings of Pt/C Catalysts Raja Swaidan The Cooper Union Advisor: Dr. Branko N. Popov Electrochemical Engineering 26 July 2007 Overview of Research Studied
More informationOxidation and Reduction. Oxidation and Reduction
Oxidation and Reduction ϒ When an element loses an electron, the process is called oxidation: Na(s) Na + (aq) + e - ϒ The net charge on an atom is called its oxidation state in this case, Na(s) has an
More informationWHAT IS A BATTERY? way to store energy is through chemical bonds in substances, which is the basic
WHAT IS A BATTERY? Energy cannot be destroyed or created, but it can be stored in various forms. One way to store energy is through chemical bonds in substances, which is the basic concept of fossil and
More informationElectrodeposited nickel hydroxide on nickel foam with ultrahigh. capacitance
Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance Guang-Wu Yang, Cai-Ling Xu* and Hu-Lin Li* College of Chemistry and Chemical Engineering, Lanzhou University, 73 (PR China) 1.
More informationBatteries (Electrochemical Power Sources)
Batteries (Electrochemical Power Sources) 1. Primary (single-discharge) batteries. => finite quantity of the reactants 2. Secondary or rechargeable batteries => regeneration of the original reactants by
More informationSupplementary Figure 1 Result from XRD measurements. Synchrotron radiation XRD patterns of the as-prepared gold-ceria samples.
Supplementary Figure 1 Result from XRD measurements. Synchrotron radiation XRD patterns of the as-prepared gold-ceria samples. The detailed information on XRD measurement is seen in the Supplementary Methods.
More informationChemical tuning of electrochemical properties of Ptskin surface for highly active oxygen reduction reactions
Chemical tuning of electrochemical properties of Ptskin surface for highly active oxygen reduction reactions Namgee Jung, a Young-Hoon Chung, b Dong-Young Chung, b Kwang-Hyun Choi, b Hee- Young Park, a
More informationEffects of Surface Chemistry of Carbon on Hydrogen Evolution Reaction in Lead Carbon Electrodes
Effects of Surface Chemistry of Carbon on Hydrogen Evolution Reaction in Lead Carbon Electrodes Begüm Bozkaya 1, Jochen Settelein 1, Henning Lorrmann 1, Gerhard Sextl 1, 2 1 Fraunhofer Institute for Silicate
More informationSupplementary information
Supplementary information Supplementary Figures Supplementary Figure 1. CO 2 light off curve obtained from the 5 wt% Pt/Al 2 O 3 catalyst obtained through heating the catalyst under a 50 ml.min -1 flow
More informationDepartment of Chemical, Materials and Biomolecular Engineering, University of Connecticut, 191
High Stability, High Activity Pt/ITO Oxygen Reduction Electrocatalysts Ying Liu and William E. Mustain* Department of Chemical, Materials and Biomolecular Engineering, University of Connecticut, 191 Auditorium
More informationShape-selective Synthesis and Facet-dependent Enhanced Electrocatalytic Activity and Durability of Monodisperse Sub-10 nm Pt-Pd Tetrahedrons and Cubes
Supporting Information Shape-selective Synthesis and Facet-dependent Enhanced Electrocatalytic Activity and Durability of Monodisperse Sub-10 nm Pt-Pd Tetrahedrons and Cubes An-Xiang Yin, Xiao-Quan Min,
More informationElectrochemical Water Splitting by Layered and 3D Cross-linked Manganese Oxides: Correlating Structural Motifs and Catalytic Activity
Electronic Supplementary Information Electrochemical Water Splitting by Layered and 3D Cross-linked Manganese Oxides: Correlating Structural Motifs and Catalytic Activity Arno Bergmann,* a Ivelina Zaharieva,*
More informationSupplementary Materials for
advances.sciencemag.org/cgi/content/full/3/6/e1758/dc1 Supplementary Materials for A selective electrocatalyst ased direct methanol fuel cell operated at high concentrations of methanol This PDF file includes:
More informationSupporting information:
Supporting information: The Role of Anisotropic Structure and Its Aspect Ratio: High-Loading Carbon Nanospheres Supported Pt Nanowires and Their High Performance Toward Methanol Electrooxidation Feng-Zhan
More informationSupporting Information
Electronic Supplementary Material (ESI) for Nanoscale. This journal is The Royal Society of Chemistry 2014 Engineering Cu 2 O/NiO/Cu 2 MoS 4 Hybrid Photocathode for H 2 Generation in Water Chen Yang, a,b
More informationSupporting Information for. Highly durable Pd metal catalysts for the oxygen. reduction reaction in fuel cells; Coverage of Pd metal with.
Supporting Information for Highly durable Pd metal catalysts for the oxygen reduction reaction in fuel cells; Coverage of Pd metal with silica Sakae Takenaka 1 *, Naoto Susuki 1, Hiroaki Miyamoto 1, Eishi
More informationSupplementary Material (ESI) for Chemical Communications This journal is (c) The Royal Society of Chemistry Supporting Information
Supporting Information A facile approach to the synthesis of highly electroactive Pt nanoparticles on graphene as anode catalyst for direct methanol fuel cells Yi-Ge Zhou, Jing-Jing Chen, Feng-bin Wang*,
More informationSupporting Information
Electronic Supplementary Material (ESI) for Nanoscale. This journal is The Royal Society of Chemistry 2014 Supporting Information Hydrothermal synthesis of - alloy nanooctahedra and their enhanced electrocatalytic
More informationPhoton Interaction. Spectroscopy
Photon Interaction Incident photon interacts with electrons Core and Valence Cross Sections Photon is Adsorbed Elastic Scattered Inelastic Scattered Electron is Emitted Excitated Dexcitated Stöhr, NEXAPS
More informationElectrolytes for Fuel Cells
Electrolytes for Fuel Cells Tom Zawodzinski Materials Science and Technology Division Los Alamos National Laboratory Air-Breather Fuel Cell Stack Systems Laptop Demo DCH/Enable Prototype Small Battery
More informationX-ray Absorption Spectroscopy and applications to fuel cell catalysts
X-ray Absorption Spectroscopy and applications to fuel cell catalysts Carlo Segre Physics Department & CSRRI, Illinois Institute of Technology and Materials Research Collaborative Access Team Sponsors:
More informationSupporting Information
Supporting Information Bamboo-Like Carbon Nanotube/Fe 3 C Nanoparticle Hybrids and Their Highly Efficient Catalysis for Oxygen Reduction Wenxiu Yang a,b, Xiangjian Liu a,b, Xiaoyu Yue a,b, Jianbo Jia,
More informationAnalytical Investigation of Fuel Cells by Using In-situ and Ex-situ Diagnostic Methods
Analytical Investigation of Fuel Cells by Using In-situ and Ex-situ Diagnostic Methods G. Schiller, E. Gülzow, M. Schulze, N. Wagner, K.A. Friedrich German Aerospace Center (DLR), Institute of Technical
More informationSynthesis and Characterization of Gold-Palladium Nanoparticles Catalyst For Improved Hydrogen Fuel Cell Performance
Synthesis and Characterization of Gold-Palladium Nanoparticles Catalyst For Improved Hydrogen Fuel Cell Performance Adam Bennett a, Helen Liu a, Allen Tran a, Likun Wang b, Miriam Rafailovich a,b* a,b
More informationUnusual Stability of Acetonitrile-Based Superconcentrated. Electrolytes for Fast-Charging Lithium-Ion Batteries
Supporting Information for Unusual Stability of Acetonitrile-Based Superconcentrated Electrolytes for Fast-Charging Lithium-Ion Batteries Yuki Yamada,, Keizo Furukawa, Keitaro Sodeyama,, Keisuke Kikuchi,
More informationNickel Sulfides Freestanding Holey Films as Air-Breathing Electrodes for. Flexible Zn-Air Batteries
Nickel Sulfides Freestanding Holey Films as Air-Breathing Electrodes for Flexible Zn-Air Batteries Kyle Marcus, 1,# Kun Liang, 1,# Wenhan Niu, 1,# Yang Yang 1,* 1 NanoScience Technology Center, Department
More informationProbing Matter: Diffraction, Spectroscopy and Photoemission
Probing Matter: Diffraction, Spectroscopy and Photoemission Anders Nilsson Stanford Synchrotron Radiation Laboratory Why X-rays? VUV? What can we hope to learn? 1 Photon Interaction Incident photon interacts
More informationSolar desalination coupled with water remediation and molecular hydrogen production: A novel solar water-energy nexus
Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is The Royal Society of Chemistry 17 Supporting Information Solar desalination coupled with water remediation and
More informationABSTRACT. Electrochemical and Surface-enhanced Raman Studies of CO and Methanol Oxidation in the Presence of Sub-monolayer Co-adsorbed Sulfur
ABSTRACT Electrochemical and Surface-enhanced Raman Studies of CO and Methanol Oxidation in the Presence of Sub-monolayer Co-adsorbed Sulfur By Mathew Mattox Electrooxidation of carbon monoxide (CO) and
More informationSurface Oxidation Mechanism of Ni(0) Particle Supported on Silica
Surface Oxidation Mechanism of Ni(0) Particle Supported on Silica Shohei Yamashita, Yusaku Yamamoto, Misaki Katayama, and Yasuhiro Inada Department of Applied Chemistry, Graduate School of Life Sciences,
More informationDevelopment of Bifunctional Electrodes for Closed-loop Fuel Cell Applications. Pfaffenwaldring 6, Stuttgart, Germany
Development of Bifunctional Electrodes for Closed-loop Fuel Cell Applications S. Altmann a,b, T. Kaz b, K. A. Friedrich a,b a Institute of Thermodynamics and Thermal Engineering, University Stuttgart,
More informationElectronic Supplementary Information (ESI) for:
Electronic Supplementary Material (ESI) for Green Chemistry. This journal is The Royal Society of Chemistry 2014 Electronic Supplementary Information (ESI) for: A novel photoelectrocatalytic approach for
More informationTopic 12 Redox Equilibria Revision Notes
1) Redox Reactions Topic 12 Redox Equilibria Revision Notes Redox reactions involve the transfer of electrons e.g. in the reaction between zinc metal and copper (II) sulphate, electrons are transferred
More informationExperiment 28 DIRECT METHANOL FUEL CELL
Experiment 28 Direct methanol fuel cell 1 Experiment 28 DIRECT METHANOL FUEL CELL Objective The purpose of this experiment is to learn the principle of direct methanol fuel cell (DMFC) and set up a simple
More informationElectrochemical Cell for in-situ XAFS Measurements
Electrochemical Cell for in-situ XAFS Measurements Ryota Miyahara, Kazuhiro Hayashi, Misaki Katayama, and Yasuhiro Inada Applied Chemistry Course, Graduate School of Life Sciences, Ritsumeikan University,
More informationSupporting Information. Electrocatalytic polysulfide-traps for controlling redox shuttle process of Li-S battery
Supporting Information Electrocatalytic polysulfide-traps for controlling redox shuttle process of Li-S battery Hesham Al Salem, Ganguli Babu, Chitturi V. Rao and Leela Mohana Reddy Arava * Department
More informationModeling of degradation mechanisms in low temperature fuel cells. Thomas Jahnke, Georg Futter
DLR.de Chart 1 Modeling of degradation mechanisms in low temperature fuel cells Thomas Jahnke, Georg Futter German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Computational Electrochemistry,
More informationHigh-Performance Silicon Battery Anodes Enabled by
Supporting Information for: High-Performance Silicon Battery Anodes Enabled by Engineering Graphene Assemblies Min Zhou,, Xianglong Li, *, Bin Wang, Yunbo Zhang, Jing Ning, Zhichang Xiao, Xinghao Zhang,
More informationElectrolysis and Faraday's laws of Electrolysis
Electrolysis and Faraday's laws of Electrolysis Electrolysis is defined as the passage of an electric current through an electrolyte with subsequent migration of positively and negatively charged ions
More informationDepartment of Bioengineering, 815C Benedum Hall, 3700 O Hara Street, Pittsburgh, PA
1 Supplementary information 2 3 Noble metal-free bifunctional oxygen evolution and oxygen reduction acidic media electro- catalysts 4 5 6 Prasad Prakash Patel 1, Moni Kanchan Datta 2,3, Oleg I. Velikokhatnyi
More informationFuel Cells Activation polarization
Fuel Cells The principle of fuel cells Oxygen and hydrogen, when mixed together in the presence of enough activation energy have a natural tendency to react and form water, because the Gibbs free energy
More informationUsing synchrotron radiation to study catalysis
Using synchrotron radiation to study catalysis Carlo Segre Physics Department & Center for Synchrotron Radiation Research and Instrumentation Illinois Institute of Technology March 18, 2014 Illinois Institute
More informationSupporting Information
Electronic Supplementary Material (ESI) for Energy & Environmental Science. This journal is The Royal Society of Chemistry 2015 Supporting Information Connected nanoparticle catalysts possessing a porous,
More informationSupporting Information. High Wettable and Metallic NiFe-Phosphate/Phosphide Catalyst Synthesized by
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is The Royal Society of Chemistry 2018 Supporting Information High Wettable and Metallic NiFe-Phosphate/Phosphide
More informationSupporting Information
Platinum-Gold Nanoparticles: A Highly Active Bifunctional Electrocatalyst for Rechargeable Lithium-Air Batteries Yi-Chun Lu, Zhichuan Xu, Hubert A. Gasteiger, Shuo Chen, Kimberly Hamad- Schifferli and
More informationSupplementary Figure 1. Characterization of immobilized cobalt protoporphyrin electrode. The cyclic voltammogram of: (a) pyrolytic graphite
Supplementary Figure 1. Characterization of immobilized cobalt protoporphyrin electrode. The cyclic voltammogram of: (a) pyrolytic graphite electrode; (b) pyrolytic graphite electrode with 100 µl 0.5 mm
More informatione - Galvanic Cell 1. Voltage Sources 1.1 Polymer Electrolyte Membrane (PEM) Fuel Cell
Galvanic cells convert different forms of energy (chemical fuel, sunlight, mechanical pressure, etc.) into electrical energy and heat. In this lecture, we are interested in some examples of galvanic cells.
More informationMultiply twinned Pt Pd nanoicosahedrons as highly active electrocatalyst for methanol oxidation
Supporting Information for Multiply twinned Pt Pd nanoicosahedrons as highly active electrocatalyst for methanol oxidation An-Xiang Yin, Xiao-Quan Min, Wei Zhu, Hao-Shuai Wu, Ya-Wen Zhang* and Chun-Hua
More informationEnhancing Stability of Platinum on Silica by Surface Modification - Application to CO Oxidation -
2012 CLEERS Workshop Enhancing Stability of Platinum on Silica by Surface Modification - Application to CO Oxidation - Mi-Young Kim, Jae-Soon Choi, Todd J. Toops Emissions and Catalysis Research Group
More informationIntroduction to electrochemistry
Introduction to electrochemistry Oxidation reduction reactions involve energy changes. Because these reactions involve electronic transfer, the net release or net absorption of energy can occur in the
More informationTopic 19 Redox 19.1 Standard Electrode Potentials. IB Chemistry T09D04
Topic 19 Redox 19.1 Standard Electrode Potentials IB Chemistry T09D04 19.1 Standard Electrode Potentials 19.1.1 Describe the standard hydrogen electrode. (2) 19.1.2 Define the term standard electrode potential,
More informationOperando Time-resolved XAFS Study for Surface Events on a Pt 3 Co/C. Cathode Catalyst in a PEFC during Voltage-Operating Processes
Operando Time-resolved XAFS Study for Surface Events on a Pt 3 Co/C Cathode Catalyst in a PEFC during Voltage-Operating Processes Nozomu Ishiguro ǁ, Takahiro Saida ǁ, Tomoya Uruga, Shin-ichi Nagamatsu,
More informationNCEA Chemistry 3.7 REDOX AS 91393
NCEA Chemistry 3.7 REDOX AS 91393 This achievement standard involves demonstrating understanding of oxidation-reduction processes Demonstrate comprehensive understanding (Excellence) involves: 1. Identify
More informationCarbon Quantum Dots/NiFe Layered Double Hydroxide. Composite as High Efficient Electrocatalyst for Water
Supplementary Information Carbon Quantum Dots/NiFe Layered Double Hydroxide Composite as High Efficient Electrocatalyst for Water Oxidation Di Tang, Juan Liu, Xuanyu Wu, Ruihua Liu, Xiao Han, Yuzhi Han,
More informationChapter 7 Electrochemistry
Chapter 7 Electrochemistry Outside class reading Levine: pp. 417 14.4 Galvanic cells: pp. 423 14.5 types of reversible electrodes 7.6.1 Basic concepts of electrochemical apparatus (1) Electrochemical apparatus
More informationSupplementary Figure 1. XRD pattern for pristine graphite (PG), graphite oxide (GO) and
Supplementary Figure 1. XRD pattern for pristine graphite (PG), graphite oxide (GO) and expanded graphites (EG-1hr and EG-5hr). The crystalline structures of PG, GO, EG-1hr, and EG-5hr were characterized
More informationSUPPORTING INFORMATION
Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is the Owner Societies 2018 SUPPOING INFORMATION Unifying theoretical framework for deciphering the oxygen
More informationThe Curious Case of Au Nanoparticles
The Curious Case of Au Nanoparticles Industrial reactions performed by metals 1 Low Au reactivity Predictions are typically based on d-band model Hold well for polycrystalline materials Coinage metals
More informationX-ray Spectroscopy. Interaction of X-rays with matter XANES and EXAFS XANES analysis Pre-edge analysis EXAFS analysis
X-ray Spectroscopy Interaction of X-rays with matter XANES and EXAFS XANES analysis Pre-edge analysis EXAFS analysis Element specific Sensitive to low concentrations (0.01-0.1 %) Why XAS? Applicable under
More informationNanoscale Interface Control of High-Quality Electrode Materials for Li-Ion Battery and Fuel Cell
Nanoscale Interface Control of High-Quality Electrode Materials for Li-Ion Battery and Fuel Cell Byungwoo Park Department of Materials Science and Engineering http://ep.snu.ac.kr 1 Nanoscale Control for
More informationFUEL CELLS: INTRODUCTION
FUEL CELLS: INTRODUCTION M. OLIVIER marjorie.olivier@fpms.ac.be 19/5/8 A SIMPLE FUEL CELL Two electrochemical half reactions : H 1 O H + + H + e + + e H O These reactions are spatially separated: Electrons:
More information18.3 Electrolysis. Dr. Fred Omega Garces. Chemistry 201. Driving a non-spontaneous Oxidation-Reduction Reaction. Miramar College.
18.3 Electrolysis Driving a non-spontaneous Oxidation-Reduction Reaction Dr. Fred Omega Garces Chemistry 201 Miramar College 1 Electrolysis Voltaic Vs. Electrolytic Cells Voltaic Cell Energy is released
More informationSupporting Information for
Supporting Information for Self-assembled Graphene Hydrogel via a One-Step Hydrothermal Process Yuxi Xu, Kaixuan Sheng, Chun Li, and Gaoquan Shi * Department of Chemistry, Tsinghua University, Beijing
More information