Maximizing electrochemical hydrogen peroxide production from oxygen reduction with superaerophilic electrodes

被引：44

作者：

Xia, Guangsen ^{[1
,2
]}

Tian, Yadong ^{[1
]}

Yin, Xiaomeng ^{[1
]}

Yuan, Wenhan ^{[1
]}

Wu, Xiaocui ^{[1
]}

Yang, Zhongxue ^{[1
]}

Yu, Gang ^{[1
]}

Wang, Yujue ^{[2
]}

Wu, Mingbo ^{[1
]}

机构：

[1] China Univ Petr East China, Coll New Energy, Coll Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266580, Peoples R China

[2] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing Key Lab Emerging Organ Contaminants Contr, Beijing 100084, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2021年 / 299卷

基金：

中国国家自然科学基金;

关键词：

Hydrogen peroxide; Oxygen reduction reaction; Superaerophilic electrode; Underwater wetting state; Water treatment; ACTIVATED CARBON-FIBER; MODIFIED GRAPHITE FELT; H2O2; ELECTROGENERATION; FENTON TREATMENT; WATER TREATMENT; P-NITROPHENOL; DEGRADATION; CATHODE; ELECTROSYNTHESIS; GENERATION;

D O I：

10.1016/j.apcatb.2021.120655

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study investigated the effects of electrode wettability on hydrogen peroxide (H2O2) production from oxygen reduction reaction (ORR) during electrolysis with superaerophilic electrodes. When the electrode was in the underwater Wenzel-Cassie (UWC) state, it could quickly adsorb aerated oxygen microbubbles, which significantly enhanced oxygen transfer. Meanwhile, H2O2 reduction was effectively inhibited. Consequently, high ORR currents and current efficiencies (CEs) of H2O2 production could be obtained in the UWC state. However, oxygen can only be transferred to the electrode by dissolved oxygen (DO) diffusion when the electrode was in the underwater Wenzel (UW) state. Due to the slow DO diffusion and enhanced H2O2 reduction at the wetted electrode, the rate and CEs of H2O2 production decreased dramatically in the UW state. Maintaining a stable UWC state by controlling the rate of O-2 bubbling and rate of O-2 consumption in ORR is thus critical to maximizing H2O2 electrosynthesis with the superaerophilic electrodes.

引用

页数：12

共 62 条

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