电极
电化学
电合成
催化作用
过氧化氢
化学
化学工程
选择性
可逆氢电极
反应速率
无机化学
材料科学
工作电极
物理化学
有机化学
工程类
作者
Chen Ling,Ruhong Li,Ai‐Ping Liang,Juncao Bian,Yusheng Zhao,Chaolin Li,Wenhui Wang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-06-29
卷期号:11 (28): 10264-10273
被引量:9
标识
DOI:10.1021/acssuschemeng.3c00630
摘要
Surface bubbles on electrodes generated via gas evolution reaction are generally considered harmful to the desired electrochemical reaction as they reduce the electrochemically active area and increase energy consumption. However, it is shown herein that surface bubbles on the electrode can significantly improve the electrosynthesis of hydrogen peroxide (H2O2) by a two-electron water oxidation reaction (2e-WOR) due to the high concentration of OH– accumulated by the corona of the bubbles. Inspired by this understanding, aerophilic PVDF-coated CFP electrodes were designed to prolong the residence time of the in situ generated surface bubbles to improve their 2e-WOR selectivity from 16.3 to 62.5%, and the H2O2 generation rate was as high as 28.4 μmol min–1 cm–2. This study subverts long-held assumptions about the effect of the bubbles on the electrode toward electrochemical reaction and provides a theoretical guideline for designing 2-WOR catalysts.
科研通智能强力驱动
Strongly Powered by AbleSci AI