Single Platinum Atoms Embedded in Nanoporous Cobalt Selenide As Electrocatalyst for Accelerating Hydrogen Evolution Reaction

Overview

Journal Nat Commun

Specialty Biology

Date 2019 Apr 17

PMID 30988327

Citations 51

Authors

Kang Jiang

Boyang Liu

Min Luo

Shoucong Ning

Ming Peng

Yang Zhao

Ying-Rui Lu

Ting-Shan Chan

Frank M F de Groot

Yongwen Tan

Affiliations

Soon will be listed here.

Abstract

Designing efficient electrocatalysts for hydrogen evolution reaction is significant for renewable and sustainable energy conversion. Here, we report single-atom platinum decorated nanoporous CoSe (Pt/np-CoSe) as efficient electrocatalysts for hydrogen evolution. The achieved Pt/np-CoSe shows high catalytic performance with a near-zero onset overpotential, a low Tafel slope of 35 mV dec, and a high turnover frequency of 3.93 s 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-CoSe not only can optimize surface states of CoSe 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.

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