Magnetic Field-Enhanced Acidic CO<sub>2</sub> Electroreduction Reaction on Single Nickel-Site Catalysts
Jia Song, Dayin He, Xianhui Ma, Peigen Liu, Wenxin Guo, Rongbo Sun, Feng Li, Zhicheng Zhong, Huang Zhou, Jun Tang, Jie Xu, Tongwei Wu, Lin Hu, Yuen Wu
Abstract
The synergistic integration of electrochemical reactions with an external magnetic field offers a powerful strategy for enhancing reaction performance. Herein, we introduce a flexible and continuously adjustable external magnetic field to enhance acidic CO 2 reduction reaction (CO 2 RR) performance. In an acidic electrolyte (pH = 0.91), the initial Faradaic efficiency (FE) of the CO 2 RR for CO is only 18%, which can be increased to 63.2% when a 2 T magnetic field is applied. More importantly, the introduction of this external magnetic field enables the continuous switching of CO 2 reduction products in a noncontact magnetic switching mode. Theoretical calculations demonstrate that the application of a magnetic field promotes CO 2 adsorption at Ni sites and inhibits the hydrogen evolution reaction (HER), ultimately enhancing CO 2 RR activity and selectivity. This work provides fresh insight into how an external magnetic field promotes CO 2 RR performance.