期刊
ACS APPLIED MATERIALS & INTERFACES
卷 15, 期 41, 页码 48179-48184出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c10055
关键词
electrochemistry; single-atomcatalyst; electrode/electrolyteinterface; oxygen reduction; noncovalent interactions
This study investigates the effect of noncovalent interactions on the performance of oxygen reduction reaction (ORR) using a synthesized Fe-N-C single-atom catalyst. It is found that TEA(+) plays a positive role in tuning the outer Helmholtz plane, improving oxygen diffusion coefficient, and increasing double-layer capacitance, enhancing the activity, selectivity, and stability of the catalyst towards ORR.
Highly efficient electrochemical interfaces are significant for the oxygen reduction reaction (ORR). However, previous efforts have been mainly paid to design catalytic sites with high intrinsic activity and neglect the electrode/electrolyte interfaces, especially the noncovalent interactions in the outer Helmholtz plane (OHP). Herein, an Fe-N-C single-atom catalyst is synthesized and acts as the model catalyst to demonstrate the effect of noncovalent interactions on the ORR performance. Two specific molecules of THA(+) and TEA(+) with different structures and functional groups have been selected to tune the OHP through noncovalent interactions. TEA(+) can adjust the OHP, improve the oxygen diffusion coefficient, and increase the double-layer capacitance. Therefore, TEA(+) enhances the activity, selectivity, and stability of Fe-N-C single-atom catalysts toward the ORR. This provides a new approach to finding new directions in designing electrochemical interfaces beyond the intrinsic catalytic sites in acidic electrolytes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据