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Carbon Dioxide Electroreduction to Formate in Acid Electrolytes in the Acetylene Black Gas-Diffusion Electrode with Lead Catalyst

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Abstract

The possibility of electrosynthesizing formate from СО2 at a current density of 50–190 mA/cm2 in aqueous sulfuric-acid solutions (рН 2–2.5) in a gas-diffusion electrode with lead catalyst deposited on acetylene black is studied. It is shown that by selecting the proper electrolyte composition, one can carry out the electrosynthesis with parameters differing only a little from those observed in alkaline solutions. The highest current efficiency of 74% was obtained at a potential of –1.89 V, a current density of 150 mA/cm2 in an electrolyte containing 0.5 М К2SO4 + 0.083 М Н2SO4.

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ACKNOWLEDGMENTS

This study was carried out under the State Grant for the Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences (FWES-2021-0012) with the use of equipment of the Krasnoyarsk Regional Center of Collective Use, Siberian Branch, Russian Academy of Sciences.

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Authors and Affiliations

  1. Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russia

    G. A. Kolyagin & O. P. Taran

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  1. G. A. Kolyagin
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  2. O. P. Taran
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Correspondence to G. A. Kolyagin.

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The authors declare that they have no conflict of interest.

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Translated by T. Safonova

Delivered at the 20th All-Russian Meeting “Electrochemistry of Organic Compounds” (EKhOS-2022), Novocherkassk, October 18–22, 2022.

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Kolyagin, G.A., Taran, O.P. Carbon Dioxide Electroreduction to Formate in Acid Electrolytes in the Acetylene Black Gas-Diffusion Electrode with Lead Catalyst. Russ J Electrochem 59, 764–766 (2023). https://doi.org/10.1134/S1023193523100087

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  • DOI: https://doi.org/10.1134/S1023193523100087

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