%0 Journal Article
%A Bertelsen, Andreas Dueholm
%A Klemmt, Rebekka
%A Kolding, Kirstine Nygaard
%A Bøjesen, Espen Drath
%A Iversen, Bo Brummerstedt
%T Copper-Rich Pd<sub>x</sub>Cu<sub>1–x</sub> Alloy Nanoparticles as Catalyst for Electrochemical Reduction of CO<sub>2</sub>
%J Chemistry of materials
%V 37
%N 17
%@ 0897-4756
%C Washington, DC
%I American Chemical Society
%M PUBDB-2025-04777
%P 6619 - 6628
%D 2025
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1021/acs.chemmater.5c01148
%U https://bib-pubdb1.desy.de/record/640326