Electronic Supplementary Material Lotus root-like porous carbon nanofiber anchored with CoP nanoparticles as all-ph hydrogen evolution electrocatalysts Hengyi Lu 1, Wei Fan 2 ( ), Yunpeng Huang 1, and Tianxi Liu 1,2 ( ) 1 State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, 220 Handan Road, Shanghai 200433, China 2 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai 201620, China Supporting information to https://doi.org/10.1007/s12274-017-1741-x Figure S1 SEM images of PCNF obtained from (a,b) PAN/PS (0.5/0.1) and (c,d) PAN/PS (0.5/0.5). Address correspondence to Wei Fan, weifan@dhu.edu.cn; Tianxi Liu, txliu@fudan.edu.cn, txliu@dhu.edu.cn
Figure S2 SEM images of (a,b) Co 3 O 4 /PCNF-0.2, (c,d) Co 3 O 4 /PCNF-0.4, (e,f) Co 3 O 4 /PCNF-0.6, (g,h) Co 3 O 4 /PCNF-0.8. www.editorialmanager.com/nare/default.asp
Figure S3 SEM images of (a,b) CoP/PCNF-0.2, (c,d) CoP/PCNF-0.4, (e,f) CoP/PCNF-0.6, (g,h) CoP/PCNF-0.8. www.thenanoresearch.com www.springer.com/journal/12274 Nano Research
Nano Res. Figure S4 TGA curve of pure CoP, PCNF and CoP/PCNF-0.4 in air. Figure S5 SEM images of (a) pure Co3O4 and (b) pure CoP. Figure S6 The nitrogen adsorption/desorption isotherms and BJH pore size distribution (inset) of CoP/PCNF-0.4. www.editorialmanager.com/nare/default.asp
Figure S7 CV curves of (a) CoP/CNF and (b) CoP/PCNF at different scan rates in 0.5 M H 2 SO 4. Figure S8 SEM images of CoP/PCNF after cycling in (a) 0.5 M H 2 SO 4, (b) 1M PBS and (c) 1 M KOH. Table S1 Comparison of the performance with several recent works on metal phosphides as HER catalyst. Catalyst Catalyst form Electrolyte Onset- potential vs. RHE (mv) Overpotential (mv) at Tafel Slope 10 ma cm -2 (mv dec -1 ) Ref. CoP/PCNF membrane 1 M PBS 20 91 83 191 62 111 This Work 84 138 81 CoP-CNT powder 64 139. 52 [1] CoP NW/Hb membrane 1 M PBS 47 46 78 121 68 106 [2] 38 52 88 H-CoP/C powder N.A. 111 40 [3] FeP/C powder N.A. 71 52. [4] Ni 2 P@NC powder N.A. 138 57 [5] Porous Ni 2 P polyhedron MoP-C Fe 2 P@rGO on Ti plate CoP@NC powder powder plate powder 1 M PBS NiP x coated CC membrane 1 M PBS 135 230 101 [10] 80 75 58 67 N.A. 41 N.A. 21 N.A. 158 160 150 135 169 101 157 78 62 73 78 70 82 70 55.2 72.5 49 58 [6] [7] [8] [9] www.thenanoresearch.com www.springer.com/journal/12274 Nano Research
References: [1] Wu, C.; Yang, Y. J.; Dong, D.; Zhang, Y. H.; Li, J. H. In situ coupling of CoP polyhedrons and carbon nanotubes as highly efficient hydrogen evolution reaction electrocatalyst. Small. 2017, 13, 1602873. [2] Huang, J. W.; Li, Y. R.; Xia, Y. F.; Zhu, J. T.; Yi, Q. H.; Wang, H.; Xiong, J.; Sun, Y. H.; Zou, G. F. Flexible cobalt phosphide network electrocatalyst for hydrogen evolution at all ph values. Nano Res. 2017, 10, 1010-1020. [3] Bai, Y.; Fang, L.; Xu, H.; Gu, X.; Zhang, H.; Wang, Y. Strengthened synergistic effect of metallic MxPy (M = Co, Ni, and Cu) and carbon layer via peapod-like architecture for both hydrogen and oxygen evolution reactions. Small. 2017, 13, 1603718. [4] Chung, D. Y.; Jun, S. W.; Yoon, G.; Kim, H.; Yoo, J. M.; Lee, K. S.; Kim, T.; Shin, H.; Sinha, A. K.; Kwon, S. G.; Kang, K.; Hyeon, T.; Sung, Y. E. Large-scale synthesis of carbon-shell-coated FeP nanoparticles for robust hydrogen evolution reaction electrocatalyst. J. Am. Chem. Soc. 2017, 139, 6669-6674. [5] Pu, Z. H.; Zhang, C. T.; Amiinu, I. S.; Li, W. Q.; Wu, L.; Mu, S. C. General strategy for the synthesis of transition-metal phosphide/n-doped carbon frameworks for hydrogen and oxygen evolution. ACS Appl. Mater. Interfaces. 2017, 9, 16187-16193. [6] Yan, L. T.; Dai, P. C.; Wang, Y.; Gu, X.; Li, L. J.; Cao, L.; Zhao, X. B. In situ synthesis strategy for hierarchically porous Ni 2 P polyhedrons from MOFs templates with enhanced electrochemical properties for hydrogen evolution. ACS Appl. Mater. Interfaces. 2017, 9, 11642-11650. [7] Wu, Z. X.; Wang, J.; Liu, R.; Xia, K. D.; Xuan, C. J.; Guo, J. P.; Lei, W.; Wang, D. L. Facile preparation of carbon sphere supported molybdenum compounds (P, C and S) as hydrogen evolution electrocatalysts in acid and alkaline electrolytes. Nano Energy. 2017, 32, 511-519. [8] Liu, M. J.; Yang, L. M.; Liu, T.; Tang, Y. H.; Luo, S. L.; Liu, C. B.; Zeng, Y. X. Fe 2 P/reduced graphene oxide/fe 2 P sandwich-structured nanowall arrays: A high-performance non-noble-metal electrocatalyst for hydrogen evolution. J. Mater. Chem. A. 2017, 5, 8608-8615. [9] Yang, F. L.; Chen, Y. T.; Cheng, G. Z.; Chen, S. L.; Luo, W. Ultrathin nitrogen-doped carbon coated with CoP for efficient hydrogen evolution. ACS Catal. 2017, 7, 3824-3831. [10] Chen, M. X.; Qi, J.; Zhang, W.; Cao, R. Electrosynthesis of NiPx nanospheres for electrocatalytic hydrogen evolution from a neutral aqueous solution. Chem. Commun. 2017, 53, 5507-5510. www.editorialmanager.com/nare/default.asp