Anodic peroxide production for advanced oxidation processes with different metal oxide electrodes in carbonate electrolytes

T. Schanz, J. Z. Bloh

Environ. Sci.: Adv., 2024,3, 1281-1288

https://doi.org/10.1039/D4VA00176A

Abstract

As an alternative to the anthraquinone process that can be used directly on site without storage and transport, electrochemical peroxide synthesis is a promising technology to produce reagents for water remediation via Advanced Oxidation Processes (AOP). The focus of research here is on anodic peroxide production, since cathodic synthesis is already at a high degree of maturity. Different materials and electrolytes have been reported for the anode reactions so far. It has also been shown that some electrolytes such as carbonate-based ones lead to the formation of secondary peroxides such as percarbonates which are well-suited as oxidants for AOP. Herein, these materials and electrolytes are evaluated under different conditions with particular focus on the actual oxidation power of the formed product mixtures.

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