离子液体
电解质
电催化剂
材料科学
电化学
催化作用
电解
法拉第效率
化学工程
四氟硼酸盐
碳纳米泡沫
无机化学
多孔性
电极
化学
复合材料
有机化学
物理化学
工程类
作者
Hongyu Zhang,Shaojuan Zeng,Chongyang Jiang,Kuilin Peng,Jiaqi Feng,Lei Yuan,Xin Li,Fei Xu,Xiangping Zhang
出处
期刊:Chemcatchem
[Wiley]
日期:2024-03-08
卷期号:16 (15)
被引量:1
标识
DOI:10.1002/cctc.202400045
摘要
Abstract The application of electrochemical CO 2 reduction reaction (CO 2 RR) to generate value‐added products, including carbon monoxide (CO), represents a sustainable strategy for addressing the global carbon balance. Silver (Ag) has gained significant attention as an attractive and cost‐effective electrocatalyst for CO 2 RR‐to‐CO due to high activity. Here, the porous Ag nanofoam catalysts with Ag(111)‐dominant were prepared by in‐situ electrolysis‐deposition method in the ionic liquid (IL) electrolyte. The Ag nanofoam catalysts exhibited exceptional activity in converting CO 2 to CO, with a high Faradaic efficiency (>95 %) in a wide range of −1.9 ~ −2.4 V vs. Ag/Ag + in the 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([Bmim][BF 4 ]) electrolyte. The maximum CO partial current density of −125.40 mA cm −2 was obtained on this Ag nanofoam catalyst, representing 62 % improvement over Ag(110)‐dominant Ag electrode (−77.35 mA cm −2 ) at −2.4 V vs. Ag/Ag + in the [Bmim][BF 4 ] electrolyte. Density functional theory calculations demonstrated that the Ag(111) crystal facet formed by in‐situ electrolysis‐deposition method prefers to adsorb [Bmim][BF 4 ] which can stabilize the reaction intermediate, thereby weakening the reaction free energy and promoting CO 2 electroreduction.
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