Dynamic Cation Intercalation Facilitating Chemical Oxidation of Water and Surface Stabilization During the Oxygen Evolution Reaction

• DOI: 10.1002/eem2.12813
• Publication Date: 2024-08-02T05:06:46Z
• Authors: Huiyan Zeng; Zhongfei Liu; Jun Qi; Jiajun Chen; Yanquan Zeng; Chengyan Yang; Zhenzhong Li; Chao Wang; Long Gu; Yan Zhang; Miao Shu; Chunzhen Yang
• Keywords: Oxygen evolution

A comprehensive understanding of the dynamic processes at catalyst/electrolyte interfaces is crucial for development advanced electrocatalysts oxygen evolution reaction (OER). However, chemical related to surface corrosion and catalyst degradation have not been well understood so far. In this study, we employ LiCoO 2 as a model observe distinct OER activities stabilities in different alkaline solutions. Operando X‐ray diffraction (XRD) online mass spectroscopy (OMS) measurements prove selective intercalation alkali cations into layered structure during OER. It proposed that cation intercalations facilitate oxidation process between highly oxidative Co species adsorbed water molecules, triggering so‐called electrochemical‐chemical mechanism (EC‐mechanism). The results study emphasize influence on provide insights new strategies achieving both high activity stability high‐performance catalysts.