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Research Article

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

Shiyong Mou1,§, Yonghao Li2,§, Luchao Yue3, Jie Liang3, Yonglan Luo2, Qian Liu3, Tingshuai Li3, Siyu Lu4, Abdullah M. Asiri5, Xiaoli Xiong1( ), Dongwei Ma6( ), Xuping Sun3 ( )
College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, China
Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, School of Chemistry and Chemical engineering, China West Normal University, Nanchong 637002, China
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
Chemistry Department, Faculty of Science & Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
Key Laboratory for Special Functional Materials of Ministry of Education, and School of Materials Science and Engineering, Henan University, Kaifeng 475004, China

§ Shiyong Mou and Yonghao Li contributed equally to this work.

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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.

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Keywords

Cu2Sbnanowire arrayselectrochemical CO2 reductionCO2 to CO conversion

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Nano Research
Volume 14 Issue 8,
August 2021
Pages 2831-2836
DOI: 10.1007/s12274-021-3295-1

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Cite this article:
Mou S, Li Y, Yue L, et al. Cu2Sb decorated Cu nanowire arrays for selective electrocatalytic CO2 to CO conversion. Nano Research, 2021, 14(8): 2831-2836. https://doi.org/10.1007/s12274-021-3295-1
Topics:
Carbon dioxideCost effectivenessElectrocatalystsMetal claddingNanowiresPotassium compounds

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Received: 26 October 2020
Revised: 11 December 2020
Accepted: 13 December 2020
Published: 05 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020