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Dynamic investigation of oxygen defects on transition metal-based electrocatalysts: formation, characterization, and mechanism during alkaline oxygen evolution reaction

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Abstract

Oxygen defects play a critical role in the electrocatalytic oxygen evolution reaction (OER). Therefore, in-depth understanding the structure-activity-mechanism relationship of these defects is the key to design efficient OER electrocatalysts. This relationship needs to be understood dynamically due to the potential for irreversible phase transitions during OER. Consequently, significant efforts have been devoted to study the dynamic evolution of oxygen defects to shed light on the OER mechanism. This review critically examines and analyzes the dynamic processes occurring at oxygen defect sites during OER, including defect formation and defect evolution mechanisms, along with the advanced characterization techniques needed to understand these processes. This review aims to provide a comprehensive understanding of high-efficiency electrocatalysts, with a particular emphasis on the importance of in situ monitoring the dynamic evolution of oxygen defects, providing a new perspective towards efficient OER electrocatalyst design.

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Acknowledgements

This work was supported by the Ministry of Science and Technology (MOST) of China through the Key Project of Research & Development (2021YFF0500502).

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Authors and Affiliations

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China

    Rongrong Zhang, Keke Huang & Xiangdong Yao

  2. Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2500, Australia

    Qilong Wu & Jun Chen

  3. School of Science, STEM College, RMIT University, Melbourne, VIC, 3001, Australia

    Peter Sherrell

  4. State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, China

    Daohao Li

  5. College of Advanced Energy, Shenzhen Campus, Sun Yat-Sen University (SYSU), Shenzhen, 518100, China

    Xiangdong Yao

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  1. Rongrong Zhang
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Zhang, R., Wu, Q., Sherrell, P. et al. Dynamic investigation of oxygen defects on transition metal-based electrocatalysts: formation, characterization, and mechanism during alkaline oxygen evolution reaction. Sci. China Chem. 66, 2221–2237 (2023). https://doi.org/10.1007/s11426-023-1649-y

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