微电极
材料科学
催化作用
电化学
纳米技术
电解质
电催化剂
氧还原反应
纳米材料
微流控
化学工程
电极
化学
物理化学
有机化学
工程类
作者
Junlei Qi,Wenbin Wang,Yihan Li,Yamei Sun,Zongxiao Wu,Kai Bao,Lingzhi Wang,Ruquan Ye,Mengning Ding,Qiyuan He
出处
期刊:Small
[Wiley]
日期:2022-10-17
卷期号:: 2204010-2204010
标识
DOI:10.1002/smll.202204010
摘要
The on-chip electrocatalytic microdevice (OCEM) is an emerging platform specialized in the electrochemical investigation of single-entity nanomaterials, which is ideal for probing the intrinsic catalytic properties, optimizing performance, and exploring exotic mechanisms. However, the current catalytic applications of OCEMs are almost exclusively in electrocatalytic hydrogen/oxygen evolution reactions with minimized influence from the mass transfer. Here, an OCEM platform specially tailored to investigate the electrocatalytic oxygen reduction reaction (ORR) at a microscopic level by introducing electrolyte convection through a microfluidic flow cell is reported. The setup is established on gold microelectrodes and later successfully applied to investigate how Ar-plasma treatment affects the ORR activities of 2H MoS2 . This study finds that Ar-plasma treatment significantly enhances the ORR performance of MoS2 nanosheets owing to the introduction of surface defects. This study paves the way for highly efficient microscopic investigation of diffusion-controlled electrocatalytic reactions.
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