Carbonate-Induced Electrosynthesis of Hydrogen Peroxide via Two-Electron Water Oxidation

Mavrikis S, Göltz M, Rosiwal S, Wang L, De Leon CP (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Chemsuschem Wiley-VCH Verlag

DOI: 10.1002/cssc.202102137

Abstract

Electrochemical synthesis of hydrogen peroxide (H2O2), via the two-electron water oxidation reaction (2e(-) WOR), is an attractive method for the sustainable production of valuable chemicals in place of oxygen during water electrolysis. While the majority of 2e(-) WOR studies have focussed on electrocatalyst design, little research has been carried out on the selection of the supporting electrolyte. In this work, we investigate the impact of potassium carbonate (K2CO3) electrolytes, and their key properties, on H2O2 production. We found that at electrolyte pH values (>9.5) where the carbonate anion (CO32-) was prevalent in the mixture, a 26.5 % increase in the Faraday efficiency (þ) for H2O2 production was achieved, compared to bicarbonate (HCO3-) dominant solutions. Utilising boron-doped diamond (BDD) in highly concentrated K2CO3 solutions, current densities of up to 511 mA cm(-2) (in 4 m) and þs of 91.5 % (in 5 m) could be attained. The results presented in this work highlight the influence of CO32- on electrochemical H2O2 generation via the 2e(-) WOR and provide novel pathways to produce desirable commodities at the anode during electrochemical water splitting.

Authors with CRIS profile

Maximilian Göltz Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Stefan Rosiwal Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Involved external institutions

University of Southampton GB United Kingdom (GB)

How to cite

APA:

Mavrikis, S., Göltz, M., Rosiwal, S., Wang, L., & De Leon, C.P. (2022). Carbonate-Induced Electrosynthesis of Hydrogen Peroxide via Two-Electron Water Oxidation. Chemsuschem. https://doi.org/10.1002/cssc.202102137

MLA:

Mavrikis, Sotirios, et al. "Carbonate-Induced Electrosynthesis of Hydrogen Peroxide via Two-Electron Water Oxidation." Chemsuschem (2022).

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