| DOI | Resolve DOI: https://doi.org/10.1021/acsenergylett.1c02522 |
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| Author | Search for: Lees, Eric W.1; Search for: Bui, Justin C.ORCID identifier: https://orcid.org/0000-0003-4525-957X; Search for: Song, Datong1; Search for: Weber, Adam Z.ORCID identifier: https://orcid.org/0000-0002-7749-1624; Search for: Berlinguette, Curtis P.ORCID identifier: https://orcid.org/0000-0001-6875-849X |
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| Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Abstract | Bicarbonate electrolyzers are devices designed to convert CO₂ captured from point sources or the atmosphere into chemicals and fuels without needing to first isolate pure CO₂ gas. We report here an experimentally validated model that quantifies the reaction chemistry and mass transfer processes within the catalyst layer and cation exchange membrane layer of a bicarbonate electrolyzer. Our results demonstrate that two distinct chemical microenvironments are key to forming CO at high rates: an acidic membrane layer that promotes in situ CO₂ formation and a basic catalyst layer that suppresses the hydrogen evolution reaction. We show that the rate of CO product formation can be increased by modulating the catalyst and membrane layer properties to increase the rate of in situ CO₂ generation and transport to the cathode. These insights serve to inform the design of bicarbonate and BPM-based CO₂ electrolyzers while demonstrating the value of modeling for resolving rate-determining processes in electrochemical systems. |
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| Publication date | 2022-01-25 |
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| Publisher | American Chemical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 3044b6cd-2b69-4107-820d-8efcfba8fe47 |
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| Record created | 2022-02-04 |
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| Record modified | 2022-02-09 |
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