期刊
ADVANCED SCIENCE
卷 8, 期 17, 页码 -出版社
WILEY
DOI: 10.1002/advs.202101000
关键词
Curie temperature; exchange interaction; hybridization; oxidization; oxygen evolution reaction
资金
- National Natural Science Foundation of China (NSFC) [52072112, 51672069]
- Zhongyuan Thousand Talents Program of Henan Province [ZYQR201912155]
- Program for Innovative Research Team in Science and Technology in the University of Henan Province (IRTSTHN) [20IRTSTHN012]
- Science and Technology Development Project of Henan Province [202102210105]
- Natural Science Foundation of Henan Province [212300410121]
- Australian Research Council [DP190100150]
The strong correlation between magnetic properties and OER performance is revealed, with a new descriptor T-C/N developed for predicting the OER activity based on electron exchange interaction and orbital hybridization. The findings suggest that T-C/N from magnetic characterizations can be an effective tool in designing novel OER electrocatalysts.
Developing accurate descriptors for oxygen evolution reaction (OER) is of great significance yet challenging, which roots in and also boosts the understanding of its intrinsic mechanisms. Despite various descriptors are reported, it still has limitations in the facile prediction, given that complicated analytical techniques as well as time-consuming modeling and calculations are indispensable. In the present work, strong correlation of magnetic property with OER performance is revealed by in-depth investigations on the crystal and electronic structures. A facile descriptor of Curie/Neel temperature (T-C/N) is developed for La2-xSrxCo2O6-delta perovskite oxides, based on the inference that both magnetism and OER are rooted in the electron exchange interaction. Specifically, both the T-C/N and OER activity are proportional to the degree of p-d orbital hybridization, which increases with enlarged bond angle of CoOCo and/or increased oxidation of Co. This finding reveals that T-C/N from magnetic characterizations is an effective descriptor in designing novel OER electrocatalysts, and interdisciplinary researches are advantageous for revealing the controversial mechanisms of OER process.
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