Single platinum atoms embedded in nanoporous cobalt selenide as electrocatalyst for accelerating hydrogen evolution reaction

Kang Jiang, Boyang Liu, Min Luo, Shoucong Ning, Ming Peng, Yang Zhao, Ying-Rui Lu, Ting-Shan Chan, Frank M. F. Groot and Yongwen Tan ()
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Kang Jiang: Hunan University
Boyang Liu: Stockholm University
Min Luo: Shanghai Polytechnic University
Shoucong Ning: National University of Singapore
Ming Peng: Hunan University
Yang Zhao: Hunan University
Ying-Rui Lu: National Synchrotron Radiation Research Center
Ting-Shan Chan: National Synchrotron Radiation Research Center
Frank M. F. Groot: Utrecht University
Yongwen Tan: Hunan University

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Designing efficient electrocatalysts for hydrogen evolution reaction is significant for renewable and sustainable energy conversion. Here, we report single-atom platinum decorated nanoporous Co0.85Se (Pt/np-Co0.85Se) as efficient electrocatalysts for hydrogen evolution. The achieved Pt/np-Co0.85Se shows high catalytic performance with a near-zero onset overpotential, a low Tafel slope of 35 mV dec−1, and a high turnover frequency of 3.93 s−1 at −100 mV in neutral media, outperforming commercial Pt/C catalyst and other reported transition-metal-based compounds. Operando X-ray absorption spectroscopy studies combined with density functional theory calculations indicate that single-atom platinum in Pt/np-Co0.85Se not only can optimize surface states of Co0.85Se active centers under realistic working conditions, but also can significantly reduce energy barriers of water dissociation and improve adsorption/desorption behavior of hydrogen, which synergistically promote thermodynamics and kinetics. This work opens up further opportunities for local electronic structures tuning of electrocatalysts to effectively manipulate its catalytic properties by an atomic-level engineering strategy.

Date: 2019
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DOI: 10.1038/s41467-019-09765-y

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