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Polyoxometalates 2024, 3(2): 9140051 https://doi.org/10.26599/POM.2023.9140051
Research Article | Open Access | Issue | Published: 02 January 2024

Keggin-type P-W-Mo-V polyoxometalates in electrocatalyzed CO2 reduction using indium electrodes

Show Author's Information Yuehua Tai1,§,  Wencong Sun1,§,  Dong Yao2 ( ),  Li Zhou1,  Wenxue Tian1,  Haoxun Yan1,  Chunxiang Li1 ( )
Energy Chemical Engineering Professional Laboratory, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

§ Yuehua Tai and Wencong Sun contributed equally to this work.

Keywords:
polyoxometalate, ethanol, acetic acid, electrochemical CO2 reduction reaction, indium
Cite this article:
Tai Y, Sun W, Yao D, et al. Keggin-type P-W-Mo-V polyoxometalates in electrocatalyzed CO2 reduction using indium electrodes. Polyoxometalates, 2024, 3(2): 9140051. https://doi.org/10.26599/POM.2023.9140051
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Abstract Full text Electronic supplementary material About this article

Electrochemical CO2 reduction reaction (CO2RR) driven by indium-based catalysts can convert CO2 into C1 products with specific energy densities and relatively low mass. However, it is promising to obtain C2 products by introducing Keggin-type polyoxometalates (POMs) that can effectively regulate the proton-coupled electron transfer at the electrode–electrolyte interface. Here, the commercial indium sheets were combined with Keggin-type POMs (H4PVMoW10O40·15H2O, PVMoW10; H5PV2MoW9O40·10H2O, PV2MoW9) to process CO2RR. The highest Faradaic efficiency (FE) toward acetate reached 75.6% in the PVMoW10 system, and the highest FEethanol reached 85.1% in the PV2MoW9 system. The X-ray photoelectron spectroscopy (XPS) results indicated that the electron transfer by the POMs had a positive interaction with the active In0 sites, which provided a special electron channel to improve the FEs of the C2 products in CO2RR.


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Electronic supplementary material
About this article

Keggin-type P-W-Mo-V polyoxometalates in electrocatalyzed CO2 reduction using indium electrodes

Show Author's information Yuehua Tai1,§, Wencong Sun1,§, Dong Yao2 ( ), Li Zhou1, Wenxue Tian1, Haoxun Yan1, Chunxiang Li1 ( )
Energy Chemical Engineering Professional Laboratory, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

§ Yuehua Tai and Wencong Sun contributed equally to this work.

Abstract

Electrochemical CO2 reduction reaction (CO2RR) driven by indium-based catalysts can convert CO2 into C1 products with specific energy densities and relatively low mass. However, it is promising to obtain C2 products by introducing Keggin-type polyoxometalates (POMs) that can effectively regulate the proton-coupled electron transfer at the electrode–electrolyte interface. Here, the commercial indium sheets were combined with Keggin-type POMs (H4PVMoW10O40·15H2O, PVMoW10; H5PV2MoW9O40·10H2O, PV2MoW9) to process CO2RR. The highest Faradaic efficiency (FE) toward acetate reached 75.6% in the PVMoW10 system, and the highest FEethanol reached 85.1% in the PV2MoW9 system. The X-ray photoelectron spectroscopy (XPS) results indicated that the electron transfer by the POMs had a positive interaction with the active In0 sites, which provided a special electron channel to improve the FEs of the C2 products in CO2RR.

Keywords: polyoxometalate, ethanol, acetic acid, electrochemical CO2 reduction reaction, indium

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Received: 18 July 2023
Revised: 27 November 2023
Accepted: 30 November 2023
Published: 02 January 2024
Issue date: June 2024

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© The Author(s) 2024. Polyoxometalates published by Tsinghua University Press.

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