Institute of New Energy Materials, School of Materials Science and Engineering , Tianjin University , Tianjin 300072 , China.
Research Institute of Science and Technology , Tokai University , Hiratsuka , Kanagawa 259-1292 , Japan.
Langmuir. 2018 Nov 13;34(45):13544-13549. doi: 10.1021/acs.langmuir.8b02837. Epub 2018 Nov 1.
Laser ablation in liquid was used to prepare homogeneous copper-zinc alloy catalysts that exhibited excellent selectivity for CH in CO 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.
采用液相激光烧蚀法制备了均匀的铜锌合金催化剂，该催化剂在 CO 电化学还原中对 CH 表现出优异的选择性，在-1.1 V（相对于可逆氢电极）的电位下，法拉第效率值高达 33.3%。研究发现，催化剂表面 Cu 和 Zn 原子的高度接近有利于 CO*中间体的稳定及其从 Zn 原子向 Cu 原子的转移，在此过程中进一步发生二聚化和质子化，从而生成大量的乙烯产物。这种新型均相纳米催化剂及其提出的性能机制，可能对深入了解与二氧化碳电化学还原和转化相关的过程非常有帮助。
