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Nano Research

Article Title

Cu2Sb decorated Cu nanowire arrays for selective electrocatalytic CO2 to CO conversion

Authors

Shiyong Mou, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
Yonghao Li, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, School of Chemistry and Chemical engineering, China West Normal University, Nanchong 637002, China
Luchao Yue, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Jie Liang, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Yonglan Luo, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, School of Chemistry and Chemical engineering, China West Normal University, Nanchong 637002, China
Qian Liu, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Tingshuai Li, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Siyu Lu, Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
Abdullah M. Asiri, Chemistry Department, Faculty of Science & Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
Xiaoli Xiong, College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, ChinaFollow
Dongwei Ma, Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials Science and Engineering, Henan University, Kaifeng 475004, ChinaFollow
Xuping Sun, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, ChinaFollow

Keywords

Cu2Sb, nanowire arrays, electrochemical CO2 reduction, CO2 to CO conversion

Abstract

The advancement of cost-effective and selective electrocatalyst towards CO2 to CO conversion is crucial for renewable energy conversion and storage, thus to achieve carbon-neutral cycle in a sustainable manner. In this communication, we report that Cu2Sb decorated Cu nanowire arrays on Cu foil act as a highly active and selective electrocatalyst for CO2 to CO conversion. In CO2-saturated 0.1 M KHCO3, it achieves a high Faraday efficiency (FE) of 86.5% for CO, at -0.90 V vs. reversible hydrogen electrode (RHE). The H2/CO ratio is tunable from 0.08:1 to 5.9:1 by adjusting the potential. It is worth noting that HCOO- product was totally suppressed on such catalyst, compared with Sb counterpart. The improving selectivity for CO could be attributed to the bimetallic effect and nanowire arrays structure.

Publisher

Tsinghua University Press

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