CO₂选择性电催化还原生成甲醇、乙醇等液相产物是CO₂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 Na₂SO₄的电解质溶液中将CO₂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 CO₂ to produce liquid phase products such as methanol and ethanol,is considered an effective approach for the utilization of CO₂ resource.However,this technology still faces challenges including poor product selectivity and low Faraday efficiency.In this paper,we conducted the electrochemical reduction of CO₂ to liquid phase products in a 0.1 mol/L Na₂SO₄ 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.

杨浩瑜(1998-),女,硕士生,研究方向为电催化,yanghaoyu9811@163.com;王虎(1978-),男,博士,教授,研究方向为电化学,通讯联系人,senty78@126.com。