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

Sotirios Mavrikis; Maximilian Göltz; Stefan Rosiwal; Ling Wang; Carlos Ponce de León

doi:10.1002/cssc.202102137

journal article Feb 02, 2022

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

Sotirios Mavrikis

ChemSusChem Vol. 15 No. 4 · Wiley

View at Publisher Save 10.1002/cssc.202102137

Abstract

AbstractElectrochemical 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 (%FE) 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 %FEs 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.

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Metrics

62

Citations

50

References

Details

Published: Feb 02, 2022
Vol/Issue: 15(4)
License: View

Authors

S

Sotirios Mavrikis

Electrochemical Engineering Laboratory, Energy Technology Research Group Faculty of Engineering and Physical Sciences University of Southampton Highfield Campus University Road Southampton SO17 1BJ United Kingdom; National Centre for Advanced Tribology at Southampton (nCATS) Faculty of Engineering and Physical Sciences University of Southampton Highfield Campus University Road Southampton SO17 1BJ United Kingdom

M

Maximilian Göltz

Materials Science and Engineering for Metals Faculty of Engineering Friedrich-Alexander University of Erlangen-Nürnberg 91058 Erlangen Germany

S

Stefan Rosiwal

Materials Science and Engineering for Metals Faculty of Engineering Friedrich-Alexander University of Erlangen-Nürnberg 91058 Erlangen Germany

L

Ling Wang

National Centre for Advanced Tribology at Southampton (nCATS) Faculty of Engineering and Physical Sciences University of Southampton Highfield Campus University Road Southampton SO17 1BJ United Kingdom

C

Carlos Ponce de León

Electrochemical Engineering Laboratory, Energy Technology Research Group Faculty of Engineering and Physical Sciences University of Southampton Highfield Campus University Road Southampton SO17 1BJ United Kingdom

Funding

University of Southampton Award: 768789

Cite This Article

Sotirios Mavrikis, Maximilian Göltz, Stefan Rosiwal, et al. (2022). Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation. ChemSusChem, 15(4). https://doi.org/10.1002/cssc.202102137

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

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