Copper-indium hydroxides derived electrocatalysts with tunable compositions for electrochemical CO2 reduction

• 作者: Qixian Xie Gastón O.Larrazábal Ming Ma Ib Chorkendorff Brian Seger Jingshan Luo
• 来源期刊: 能源化学
• 年，卷（期）: 2021,（12）
• 页码范围: 278-284
• 页数: 7页
• 语种: 英文

摘要

Bimetallic Cu-In hybrid electrocatalysts are promising noble metal-free catalysts for selective electrochem-ical CO2 reduction reaction (ECO2RR).Most reports show Cu-In catalysts are selective towards CO evolution.However,few show similarly high selectivity towards formate.Herein we fabricated composition tunable Cu-In hydroxides (CuxIny-OH) by the hydrothermal method and studied their composition effect on electro-chemical CO2 reduction in detail.We found that the selectivity of CO2 reduction products shifted from CO to formate when the content of In increased in the CuxIny-OH electrocatalysts.The Cu rich electrocatalyst mostly produced CO,which could achieve a Faradaic efficiency (FE) to 75.8％ at-0.59 V vs.RHE (Cu76In24 based electrocatalysts).In comparison,the In rich electrocatalysts selectively produced formate,which pos-sessed the FE of formate up to 85％ at-1.01 V vs.RHE.Our work systematically illustrates the composition effect on hybrid catalysts,and provides insights into the design of highly selective catalysts for ECO2RR.