Improvement of the selectivity of the electrochemical conversion of CO2 to hydrocarbons using cupreous electrodes with in-situ oxidation by oxygen

Boosting CO2 electroreduction towards C2+ products via CO* intermediate manipulation on copper-based catalysts

“…104,109 In addition, in the electrolysis process, the in situ oxidation of Cu 0 by mixing O 2 in the CO 2 feed also proved that this scheme can improve the selectivity for C 2+ hydrocarbons. 110…”

“…After deep investigation on the influence of crystal planes on the product distribution on Cu catalysts, many scholars found that high-index crystal facets have higher catalytic activity for C 2+ products due to their larger population of unsaturated atoms. 65,66 Vollmer 71 compared the CO adsorption behavior on low-index (Cu (111), Cu (100) and Cu (110)) and high-index crystal facets (Cu (211), Cu (221) and Cu(532)) via the temperature-programmed desorption (TPD) method. It was proven that the sites on the step edge and knot have a stronger binding force to CO, 72 and these sites tend to have a higher degree of coordination unsaturation.…”

An overview of Cu-based heterogeneous electrocatalysts for CO2reduction

“…In situ formation of oxide during CO 2 electrolysis is a promising method to activate Cu electrocatalysts, although the promoted products are uncertain. A. Engelbrecht and co-workers 161 oxidized Cu in situ by using a CO 2 /O 2 gas mixture instead of pure CO 2 gas and found that the formation of CH 4 was largely suppressed, while C 2 H 4 was favored (0.1 M KHCO 3 , 100 sccm). J. M. Spurgeon and coworkers 83 used a pulsed-bias technique for CO 2 reduction on Cu foil.…”

Carbon dioxide reduction mechanism on Ru-based electrocatalysts [Ru(bpy)2(CO)2]2+: insights from first-principles theory

“…In recent years, the use of carbon dioxide as a starting material for organic fuel production has offered an exciting possibility to conciliate economic development with the urge for a more environmentally friendly society. [1][2][3][4][5][6][7][8] For instance, carbon monoxide, 9,10 low-weight hydrocarbons, [11][12][13][14][15] formic acid 6,[16][17][18][19][20][21][22][23][24] and alcohols 11,[25][26][27] are among the products that have been obtained following this concept, also referred to as carbon dioxide conversion. The high stability of carbon dioxide does not facilitate its direct conversion into useful products, but indirect approaches have been successful in accomplishing this task.…”