Huang Qing, Sheng Hua
Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, PR China.
University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Chemistry. 2024 May 17;30(28):e202400352. doi: 10.1002/chem.202400352. Epub 2024 Mar 28.
The utilization of a magnetic field to manipulate spin states has emerged as a novel approach to enhance efficiency in electrocatalytic reactions, distinguishing from traditional strategies that focus on tuning activation energy barriers. Currently, this approach is specifically tailored to reactions where spin states change during the catalytic process, such as the oxidation of singlet HO to triplet O. In the magnetically enhanced oxygen evolution reaction (OER) procedure, the parallel spin alignment on the ferromagnetic catalyst was induced by the external magnetic field, facilitating the triplet O-O bonding, which is the rate limiting step in OER. This review centers on recent advancements in harnessing external magnetic fields to enhance OER performance, delving into mechanistic approaches for this magnetic promotion. Additionally, we provide a summary of magnetic field application in other electrocatalytic reactions, including oxygen reduction, methanol oxidation, and CO reduction.
利用磁场来操纵自旋态已成为提高电催化反应效率的一种新方法，这与专注于调节活化能垒的传统策略不同。目前，这种方法特别适用于催化过程中自旋态发生变化的反应，比如单重态HO氧化为三重态O。在磁增强析氧反应（OER）过程中，外部磁场诱导了铁磁催化剂上的平行自旋排列，促进了三重态O-O键的形成，这是OER中的速率限制步骤。本综述聚焦于利用外部磁场提高OER性能的最新进展，深入探讨这种磁促进的机理方法。此外，我们还总结了磁场在其他电催化反应中的应用，包括氧还原、甲醇氧化和CO还原。
