Indirect H2O2 synthesis without H2

Arthur G. Fink, Roxanna S. Delima, Alexandra R. Rousseau, Camden Hunt, Natalie E. LeSage, Aoxue Huang, Monika Stolar and Curtis P. Berlinguette ()
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Arthur G. Fink: The University of British Columbia
Roxanna S. Delima: The University of British Columbia
Alexandra R. Rousseau: The University of British Columbia
Camden Hunt: The University of British Columbia
Natalie E. LeSage: The University of British Columbia
Aoxue Huang: The University of British Columbia
Monika Stolar: The University of British Columbia
Curtis P. Berlinguette: The University of British Columbia

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Industrial hydrogen peroxide (H2O2) is synthesized using carbon-intensive H2 gas production and purification, anthraquinone hydrogenation, and anthrahydroquinone oxidation. Electrochemical hydrogenation (ECH) of anthraquinones offers a carbon-neutral alternative for generating H2O2 using renewable electricity and water instead of H2 gas. However, the H2O2 formation rates associated with ECH are too low for commercialization. We report here that a membrane reactor enabled us to electrochemically hydrogenate anthraquinone (0.25 molar) with a current efficiency of 70% at current densities of 100 milliamperes per square centimeter. We also demonstrate continuous H2O2 synthesis from the hydrogenated anthraquinones over the course of 48 h. This study presents a fast rate of electrochemically-driven anthraquinone hydrogenation (1.32 ± 0.14 millimoles per hour normalized per centimeter squared of geometric surface of electrode), and provides a pathway toward carbon-neutral H2O2 synthesis.

Date: 2024
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DOI: 10.1038/s41467-024-44741-1

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