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Oxygen evolution reaction (OER) is one of the key reactions in technologies such as solar water splitting, rechargeable metal-air batteries, renewable fuel cells, and hydrogen production from water electrolysis.
Its slow kinetics restricts the improvement of reaction efficiency
.
In recent years, the development of more active OER catalysts has become one of the research hotspots in the fields of materials, chemistry and energy
Yang Haitao, an associate researcher in the N04 group of the Institute of Physics, Chinese Academy of Sciences/Beijing National Research Center for Condensed Matter Physics, and Xu Yingchuan, a professor at Nanyang Technological University in Singapore, have devoted themselves to the study of the regulation of electrocatalytic performance by spin polarization in recent years, and have achieved relevant research results
.
For example, through experiments and theoretical calculations, the local spin configuration of NixFe1-xOOH is analyzed, and it is proposed that the oxidation and reduction reactions of water are related to the electron spin.
Recently, Ren Xiao (postdoctoral), Wu Tianze (doctoral student), Sun Yuanmiao (doctoral student) of the joint research team, etc.
, under the guidance of Yang Haitao and Xu Yingchuan, used Co-based 3d transition oxides to achieve spin poles under the action of a magnetic field.
The regulation of chemical electrons and the improvement of the efficiency of OER reaction
.
Based on the four-step kinetic mechanism of the OER reaction, this study revealed the first electron transfer process of spin-polarized electrons acting on the OER reaction
This study puts forward an important concept of total spin conservation on the active site in the OER process, which can optimize the reaction kinetics through quantum spin exchange interactions, and provides a reference for understanding and designing OER catalysts with spin polarization correlation effects Value
.
Related research results are titled Spin-polarized oxygen evolution reaction under magnetic field and published in Nature Communications.
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