摘要
Bimetallic Cu-In hybrid electrocatalysts are promising noble metal-free catalysts for selective electrochemical CO_(2) reduction reaction(ECO_(2) RR).Most reports show Cu-In catalysts are selective towards CO evolutio n.However,few show similarly high selectivity towards formate.Herein we fabricated composition tunable Cu-In hydroxides(Cu_xIn_y-OH) by the hydrothermal method and studied their composition effect on electrochemical CO_(2) reduction in detail. We found that the selectivity of CO_(2) reduction products shifted from CO to formate when the content of In increased in the Cu_xIn_y-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(Cu_(76)In_(24)based electrocatalysts).In comparison,the In rich electrocatalysts selectively produced formate,which possessed 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 ECO_(2) RR.
基金
funding support from the National Key Research and Development Program of China (2019YFE0123400)
the Tianjin Distinguished YoungScholars Fund (20JCJQJC00260)
the "111" Project (B16027)
funding support from the Villum Foundation V-SUSTAIN Grant 9455
funding from the European Union's Horizon 2020 research and innovation program through a Marie Sklodowska-Curie postdoctoral fellowship under grant agreement 844288 (STRATCAT-CO_(2))
scholarship from the China Scholarship Council。
