Magnetic fields promote electrocatalytic CO_(2)reduction via subtle modulations of magnetic moments and molecular bonding  

作　　者：Shilin Wei Weiqi Liu Peiyao Bai Chuangchuang Yang Xiao Kong Lang Xu 

机构地区：[1]MOE Key Laboratory of Coal Processing and Efficient Utilization,School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,China

出　　处：《Eco-Environment & Health》2024年第2期247-255,共9页生态环境与健康（英文）

基　　金：supported by the Fundamental Research Funds for the Central Universities(2023ZDPY04).

摘　　要：Introducing a magnetic-field gradient into an electrically driven chemical reaction is expected to give rise to intriguing research possibilities.In this work,we elaborate on the modes and mechanisms of electrocatalytic activity(from the perspective of alignment of magnetic moments)and selectivity(at the molecular level)for the CO_(2)reduction reaction in response to external magnetic fields.We establish a positive correlation between magnetic field strengths and apparent current densities.This correlation can be rationalized by the formation of longer-range ordering ofmagnetic moments and the resulting decrease in the scattering of conduction electrons and charge-transfer resistances as the field strength increases.Furthermore,aided by the magnetic-field-equipped operando infrared spectroscopy,we find that applied magnetic fields are capable of weakening the C–O bond strength of the key intermediate*COOH and elongating the C–O bond length,thereby increasing the faradaic efficiency for the electroreduction of CO_(2)to CO.

关 键 词：External field Magnetic dependence Molecular level Multiphysics coupling 

分 类 号：O441[理学—电磁学]