DataVXACS Energy LettersPaper
journal article·2024-11-08

Regulating Reconstruction Activity of Cobalt Electrode for Optimized Water Oxidation

Miao Wang, Ziyi Wang, Yunze Zhang, Yan Shi, Ting-Shan Chan, Shu-Chih Haw, Jian Wang, Hongsheng Wang, Siyuan Wang, Hao Fei, Ruoqi Liu, Tong Liu, Chang-Feng Yan, Jian Wang

ACS Energy Letters· Volume 9· Issue 11
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Source abstract

Abstract

Elucidating and regulating dynamic catalyst reconstruction are crucial for various electrocatalytic reactions. Here, we applied model fittings with operando characterizations to quantify the reconstruction activity (i.e., ability to reconstruct) of layered Co(OH) 2 toward the oxygen evolution reaction (OER). By modulating the intercalation species into Co(OH) 2, we governed distinct reconstruction thermodynamics and kinetics, with diverse mass changes and heterogeneous Co oxidation during the OER. We further established a volcano-type relationship between reconstruction activity and OER activity and identified that a moderate reconstruction activity, achieved by dual-anion intercalation, favored a high OER activity. This might result from its proper basal spacing that regulated the coupled ion (de)intercalation–electron transfer for reconstruction, leading to optimal Co for binding OER intermediates. The optimally reconstructed Co(OH) 1.26 Cl 0.08 (CO 3 ) 0.33 ·0.84 H 2 O delivered 1 A cm –2 at 1.78 V for anion-exchange membrane water electrolysis. This work laid the foundation for modulating reconstruction activities to benefit electrocatalysis.
Source: openalex_inverted_index · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Electrochemical Analysis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Energy and Environment

City University of Hong Kong

Hydrogen Production and Utilization Lab, CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion

Chinese Academy of Sciences

National Synchrotron Radiation Research Center

Canadian Light Source Inc., University of Saskatchewan

Department of Building and Real Estate, Research Institute for Sustainable Urban Development (RISUD), Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China

City University of Hong Kong, Shenzhen Research Institute

Funding

Guangdong Provincial Department of Science and Technology · Research Grants Council, University Grants Committee · Science and Technology Department of Sichuan Province · City University of Hong Kong · National Natural Science Foundation of China · Environmental Protection Department of Hong Kong

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