Issue 47, 2020

Electrochemical oxygen reduction for H2O2 production: catalysts, pH effects and mechanisms

Abstract

Electrochemical oxygen reduction offers an efficient and environmentally friendly route for hydrogen peroxide (H2O2) generation. This electrochemical process can produce H2O2 on-site under ambient conditions. High selectivity and activity two-electron oxygen reduction reaction (2eāˆ’ ORR) catalysts are crucial for efficient electrochemical H2O2 synthesis. Here, metal/metal oxide, carbon material, and single-atom based 2eāˆ’ ORR catalysts developed to produce H2O2 are reviewed. As the performance of the catalysts strongly depends on the pH values of electrolytes, pH effects and reaction mechanisms for the catalysts are further summarized to give a deep insight into this research area. This review would help us better understand the catalysts for electrochemical H2O2 synthesis and their rational design in the future.

Graphical abstract: Electrochemical oxygen reduction for H2O2 production: catalysts, pH effects and mechanisms

Article information

Article type
Review Article
Submitted
16 9 2020
Accepted
30 10 2020
First published
31 10 2020

J. Mater. Chem. A, 2020,8, 24996-25016

Electrochemical oxygen reduction for H2O2 production: catalysts, pH effects and mechanisms

Y. Pang, H. Xie, Y. Sun, M. Titirici and G. Chai, J. Mater. Chem. A, 2020, 8, 24996 DOI: 10.1039/D0TA09122G

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