Trapped Platinum Single-Site Catalysts for the Hydrogen Evolution Reaction

• DOI: 10.1149/ma2023-02422063mtgabs
• Publication Date: 2024-02-08T19:57:14Z
• Authors: Po-Yuan Huang; Peng Tang; Jack E. N. Swallow; Diego Gianolio; Robert S Weatherup; Mauro Pasta

Trapped platinum single-site catalysts (Pt-SSCs) in defective carbon substrates are of particular interest for polymer-electrolyte membrane (PEM) water electrolysers due to their high Pt atom utilization the hydrogen evolution reaction (HER). However, intrinsic catalytic activity compared with metallic nanoparticles remains a topic debate field opposing results reported. [1, 2] A detailed investigation bonding environment and its at HER working conditions is therefore warranted order corelate structure stability. Here, we present analysis on trapped Pt-SSC prepared by pyrolysing H 2 PtCl 6 adsorbed polyaniline substrate. [3] We used in-situ heated scanning transmission electron microscopy, temperature-dependent X-ray photoelectron spectroscopy operando absorption follow Pt’s during pyrolysis HER. demonstrate that stable under potentials but lower relative commercial nanoparticles. also perform first principles calculations elucidate origin inferior activity. Our promote understanding relationship between performance, calls techno-economic assess practicality using Pt-SSCs PEM electrolyzers. References Q. Yang, H. Liu, P. Yuan, Y. Jia, L. Zhuang, Zhang, X. Yan, G. Liu,Y. Zhao, J. S. Wei, Song, Wu, B. Ge, K. Wang, C.-R. Chang, Yao, Am. Chem. Soc. , 144 2171 (2022). Tan, T. R. Kuo, C. Lin, Hsu, Zhu, Chu, Chen, F. Lee, M. Small 17 2005713 (2021). Tang, P.-Y. Huang, E. N. Swallow, D. Gianolio, Guo, Warner, Weatherup Pasta, “Structure- property defect-trapped electrocatalysts reaction” Reasearch Square (2023), doi: 10.21203/rs.3.rs-2397818/v1.