Activity and Selectivity in the Electrochemical Reduction of CO2 at CuSnx Electrocatalysts Using a Zero-Gap Membrane Electrode Assembly
Date
2024-08-28
Journal Title
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Publisher
Journal of The Electrochemical Society
Abstract
In this study Cu, Sn, and bimetallic CuSnx nanoparticles were synthesized and evaluated as electrocatalysts for CO2 reduction using zero gap membrane electrode assemblies. Results show bimetallic electrocatalysts with Sn contents above 10% yield formate as a primary product with Faradaic Efficiencies near 70% at 350 mA cm−2. Cu-Snx electrocatalysts with less than 10% Sn yield CO at current densities below 350 mA cm−2 and relatively lower cell potentials. When the low-Sn content bimetallic electrocatalysts were evaluated in alkaline anolytes at 350 mA cm−2, ethanol was recorded as the primary product (FE = 48.5% at Ecell ≥ 3.0 V). We propose enhanced C2 activity and selectivity originate from Cu dimers adjacent to Sn atoms for bimetallic electrocatalyst with low-Sn content. The C2 active sites are lost when the surface Sn content exceeds 25%–38%.
Description
This article was originally published in Journal of The Electrochemical Society. The version of record is available at: https://doi.org/10.1149/1945-7111/ad6fd7.
© 2024 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/1945-7111/ad6fd7]
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Citation
Dauda, Monsuru, John Hendershot, Mustapha Bello, Junghyun Park, Alvaro Loaiza Orduz, Orhan Kizilkaya, Phillip Sprunger, et al. “Activity and Selectivity in the Electrochemical Reduction of CO 2 at CuSnx Electrocatalysts Using a Zero-Gap Membrane Electrode Assembly.” Journal of The Electrochemical Society 171, no. 8 (August 1, 2024): 084503. https://doi.org/10.1149/1945-7111/ad6fd7.