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Laser-Prepared CuZn Alloy Catalyst for Selective Electrochemical Reduction of CO₂ to Ethylene
- Feng, Yi, Li, Zhe, Liu, Hui, Dong, Cunku, Wang, Jiaqi, Kulinich, Sergei A., Du, Xiwen
- Langmuir 2018 v.34 no.45 pp. 13544-13549
- alloys, carbon dioxide, catalysts, copper, dimerization, electrochemistry, electrodes, ethylene, hydrogen, liquids, protonation, zinc
- Laser ablation in liquid was used to prepare homogeneous copper–zinc alloy catalysts that exhibited excellent selectivity for C₂H₄ in CO₂ electroreduction, with faradaic efficiency values as high as 33.3% at a potential of −1.1 V (vs reversible hydrogen electrode). The high proximity of Cu and Zn atoms on the surface of the catalyst was found to facilitate both stabilization of the CO* intermediate and its transfer from Zn atoms to their Cu neighbors, where further dimerization and protonation occur to give rise to a large amount of ethylene product. The new homogeneous nanocatalyst, along with the mechanism proposed for its performance, may be very helpful for in-depth understanding of processes related to carbon dioxide electroreduction and conversion.