Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7705982 | International Journal of Hydrogen Energy | 2018 | 8 Pages |
Abstract
By use of the theoretical method of density functional theory (DFT), we systemically investigate the chalcogen doped Cu4 metal clusters (Cu4O, Cu4S, and Cu4Se) as catalysts for the electrochemical CO2 reduction with toluene as solvent. These doped clusters have efficient catalytic properties which can reduce CO2 to CH4 and a small amount of CH3OH. In the case of CO2 hydrogenation to CH4, the reaction barrier of the Cu4O cluster and Cu4S cluster are reduced by 0.37Â eV and 0.15Â eV, respectively, compared with the pristine Cu4 cluster. The calculation results also show the overpotentials for the CO2 hydrogenation to CH4 in the order of Cu4SÂ <Â Cu4OÂ <Â Cu4Se. Inâaddition, the geometry structures, the electronic properties, and the reaction free energies on the chalcogen doped Cu4 clusters are also discussed to further reveal the reaction mechanism in the CO2 electroreduction process. We hope that our present work will enlighten extensive studies on the modified electrode to decrease the limiting potential and provide a reference for the subsequent studies.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Qi-Yan Zhang, Qin-Fu Zhao, Xi-Min Liang, Xiao-Li Wang, Feng-Xian Ma, Bing-Bing Suo, Wen-Li Zou, Hui-Xian Han, Qi Song, Qi Wu, Ya-Wei Li, Hai-Yan Zhu,