CuAg双金属催化剂选择性还原CO_(2)为CH_(3)OH的研究

Selective electrocatalytic reduction of CO_(2) to CH_(3)OH usinga CuAg bimetallic catalyst

CO_(2)选择性电催化还原生成甲醇、乙醇等液相产物是CO_(2)资源化利用的有效途径,但该技术存在产物选择性差、法拉第效率低等问题。因此,以Ag修饰的泡沫铜为催化剂,在0.1 mol/L Na_(2)SO_(4)的电解质溶液中将CO_(2)电化学还原为液相产物。结果表明,CuAg双金属催化剂能抑制析氢反应的产生,并显著提升甲醇产物的选择性,甲醇的法拉第效率高达85.48%;电解超过100 h,催化剂的催化性能仍保持稳定。

The selective electrocatalytic reduction of CO_(2)to produce liquid phase products such as methanol and ethanol,is considered an effective approach for the utilization of CO_(2)resource.However,this technology still faces challenges including poor product selectivity and low Faraday efficiency.In this paper,we conducted the electrochemical reduction of CO_(2)to liquid phase products in a 0.1 mol/L Na_(2)SO_(4) electrolyte solution using Ag-modified copper foam as a catalyst.The results demonstrate that CuAg bimetallic catalyst effectively suppresses the hydrogen evolution reaction while significantly enhancing the selective production of methanol,with a remarkable Faraday efficiency reaching 85.48%.Moreover,our catalyst exhibits excellent stability over 100 hours of continuous electrolysis.