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| Home > Publications database > Copper-Rich Pd$_x$Cu$_{1–x}$ Alloy Nanoparticles as Catalyst for Electrochemical Reduction of CO$_2$ |
| Home > Publications database > Copper-Rich Pd$_x$Cu$_{1–x}$ Alloy Nanoparticles as Catalyst for Electrochemical Reduction of CO$_2$ |
| Journal Article | PUBDB-2025-04777 |
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2025
American Chemical Society
Washington, DC
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Please use a persistent id in citations: doi:10.1021/acs.chemmater.5c01148 doi:10.3204/PUBDB-2025-04777
Abstract: Copper is uniquely able to catalyze the formation of hydrocarbon-derived molecules through the electrochemical carbon dioxide reduction reaction (CO2RR) in aqueous media. Here, we investigate the change of selectivity and/or activity in CO2RR by alloying Cu with palladium by using PdxCu1–x nanoparticles as electrocatalysts. In situ powder X-ray diffraction reveals a much lowered reduction temperature of the Cu-precursor upon alloying and establishes the importance of high heating rates during synthesis to ensure homogeneous Pd alloying into copper-rich PdxCu1–x nanoparticles. Two different synthetic approaches were used to obtain PdxCu1–x nanoparticles with a composition range of x = 0.025–0.20, and the complex nanostructures of the particles were highlighted using four-dimensional Scanning Transmission Electron Microscopy (4D-STEM). The activity and selectivity toward electrochemical CO2RR in 0.1 M KHCO3 were assessed for increasing Pd contents, and a systematic decrease in faradaic efficiency toward hydrocarbon products was found coupled with an increase in faradaic efficiency toward primarily H2. The results do not support PdxCu1–x alloying as a viable method for increasing selectivity toward specific hydrocarbon products in electrochemical CO2RR.
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