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| Main Authors: | , , , , , , , , , , , |
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| Format: | Artículo Open Access |
| Published: |
Wiley
2024
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| Subjects: | |
| Online Access: | https://onlinelibrary.wiley.com/doi/10.1002/eem2.12813 |
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Table of Contents:
- Dynamic Cation Intercalation Facilitating Chemical Oxidation of Water and Surface Stabilization During the Oxygen Evolution Reaction Huiyan Zeng Zhongfei Liu Jun Qi Jiajun Chen Yanquan Zeng Chengyan Yang Zhenzhong Li Chao Wang Long Gu Yan Zhang Miao Shu Chunzhen Yang ENERGY & ENVIRONMENTAL MATERIALS A comprehensive understanding of the dynamic processes at the catalyst/electrolyte interfaces is crucial for the development of advanced electrocatalysts for the oxygen evolution reaction (OER). However, the chemical processes related to surface corrosion and catalyst degradation have not been well understood so far. In this study, we employ LiCoO2 as a model catalyst and observe distinct OER activities and surface stabilities in different alkaline solutions. Operando X‐ray diffraction (XRD) and online mass spectroscopy (OMS) measurements prove the selective intercalation of alkali cations into the layered structure of LiCoO2 during OER. It is proposed that the dynamic cation intercalations facilitate the chemical oxidation process between highly oxidative Co species and adsorbed water molecules, triggering the so‐called electrochemical‐chemical reaction mechanism (EC‐mechanism). The results of this study emphasize the influence of cations on OER and provide insights into new strategies for achieving both high activity and stability in high‐performance OER catalysts. 10.1002/eem2.12813 http://creativecommons.org/licenses/by/4.0/