过程(计算)
国家(计算机科学)
材料科学
计算机科学
算法
操作系统
作者
Yanjie Li,Chaoqun Qu,Siqi Meng,Jiaqi Hu,Ze Gao,Hongji Xu,Rui Gao,Ming Feng
标识
DOI:10.1016/j.cclet.2024.109872
摘要
Oxygen evolution reaction (OER) is one of the most important half-reactions related to metal-air batteries, fuel cells, and water-splitting. Due to the sluggish kinetic and multi-electron transfer, catalysts appear to be particularly important for the OER. Knowing the reaction mechanism is fundamental to developing new catalysts and improving OER efficiency. In this work, phase transition and atomic reconstruction on CoO (111) plane were revealed through ex-situ diffraction methods and X-ray absorption spectroscopy. At the same time, the electronic state evolution of Co(II)/Co(III) during the OER process has also been concluded by analyzing the magnetic properties. This work shows that during the OER process, Co(III) experiences surface electron rearrangement from IS (intermediate-spin state) to LS (low-spin state) and then returns to IS/HS (high-spin state) under high voltage region. This work provides a new view to reveal the reaction mechanism through the magnetic property and it can be extended to more magnetic 3d transition metals for future catalyst design.
科研通智能强力驱动
Strongly Powered by AbleSci AI