Neighbouring Synergy in High‐Density Single Ir Atoms on CoGaOOH for Efficient Alkaline Electrocatalytic Oxygen Evolution

Author:

Ma Peiyu1ORCID,Cao Heng1ORCID,Hao Qi2ORCID,Wang Ruyang1ORCID,Liu Wanting3,Zuo Ming3,Jia Chuanyi4ORCID,Zhang Zhirong3ORCID,Bao Jun1ORCID

Affiliation:

1. National Synchrotron Radiation Laboratory Key Laboratory of Precision and Intelligent Chemistry iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of China Hefei Anhui 230026 P. R. China

2. School of Engineering Westlake University Hangzhou Zhejiang 310030 P. R. China

3. Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences Key Laboratory of Surface and Interface Chemistry Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China

4. Guizhou Provincial Key Laboratory of Computational Nano-Material Science Institute of Applied Physics Guizhou Education University Guiyang Guizhou 550018 P. R. China

Abstract

AbstractThe catalytic performance of single‐atom catalysts was strictly limited by isolated single‐atom sites. Fabricating high‐density single atoms to realize the synergetic interaction in neighbouring single atoms could optimize the adsorption behaviors of reaction intermediates, which exhibited great potential to break performance limitations and deepen mechanistic understanding of electrocatalysis. However, the catalytic behavior governed by neighbouring single atoms is particularly elusive and has yet to be understood. Herein, we revealed that the synergetic interaction in neighbouring single atoms contributes to superior performance for oxygen evolution relative to isolated Ir single atoms. Neighbouring single atoms was achieved by fabricating high‐density single atoms to narrow the distance between single atoms. Electrochemical measurements demonstrated that the Nei‐Ir1/CoGaOOH with neighbouring Ir single atoms exhibited a low overpotential of 170 mV at a current density of 10 mA cm−2, and long‐durable stability over 2000 h for oxygen evolution. Mechanistic studies revealed that neighbouring single atoms synergetic stabilized the *OOH intermediates via extra hydrogen bonding interactions, thus significantly reducing the reaction energy barriers, as compared to isolated Ir single atoms. The discovery of the synergetic interaction in neighbouring single atoms could offer guidance for the development of efficient electrocatalysts, thus accelerating the world‘s transition to sustainable energy.

Funder

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

National Key Research and Development Program of China

Publisher

Wiley

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