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Research Article

In situ construction of thiol-silver interface for selectively electrocatalytic CO2 reduction

Ying Chen1, Feng Hu1,4( ), Yanan Hao1, Yonghan Wang1, Yaoyi Xie1, Hui Wang1, Lijie Yin1, Deshuang Yu1, Hongchao Yang2, Jun Ma1, Dan Kai3, Linlin Li1, Shengjie Peng1( )
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
CAS Key Laboratory of Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
Institute of Materials Research and Engineering (IMRE), Singapore 138634, Singapore
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
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An erratum to this article is available online at:
https://doi.org/10.1007/s12274-022-4484-2

Abstract

Electrochemical CO2 reduction (ECR) is one of the most effective methods to obtain carbonaceous chemicals and reduce greenhouse gases passingly under the ambient condition. However, efficient electrocatalysts featured with high selectivity and stability are still lacking. A novel molecule-mediated Ag electrocatalyst with capped thiols is rationally designed for high-performance ECR. The thiol-capped and carbon-supported Ag nanostructures (Ag-TC) are formed by in situ electrochemical reduction from three-dimentional (3D) Ag-thiol metal-organic compound with cysteine as the anchor agent and carbon source. Ag-TC exhibits high selectivity and stability for CO2 conversion to CO (86.7%), which is more catalytically active than that of common Ag nanoparticles. The function of thiols for ECR is proved by replacing cysteine with alanine without thiol group. Meanwhile, alternatively replacing and removing the surface molecules on the Ag foil further demonstrate the effct of thiols. This work enlightens the promise of in situ construction method for molecule capped metal electrocatalyst towards selective and stable ECR.

Graphical Abstract

In situ electrochemically reduced from three-dimensional (3D) Ag-thiol metal–organic compound with cysteine as the anchor agent and carbon source, the obtained thiol-capped and carbon-supported Ag nanostructures enable an efficient conversion from CO2 to CO.

Keywords

electrochemical CO2 reduction molecule-mediated catalystthiolsAg nanoparticle

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Nano Research
Volume 15 Issue 4,
April 2022
Pages 3283-3289
DOI: 10.1007/s12274-021-3978-7

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Cite this article:
Chen Y, Hu F, Hao Y, et al. In situ construction of thiol-silver interface for selectively electrocatalytic CO2 reduction. Nano Research, 2022, 15(4): 3283-3289. https://doi.org/10.1007/s12274-021-3978-7
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Received: 15 October 2021
Revised: 01 November 2021
Accepted: 02 November 2021
Published: 18 December 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021