Volume 62, Issue 36 e202307612
Research Article

High-Rate CO2 Electrolysis to Formic Acid over a Wide Potential Window: An Electrocatalyst Comprised of Indium Nanoparticles on Chitosan-Derived Graphene

Jiahui Bi

Jiahui Bi

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Pengsong Li

Pengsong Li

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Jiyuan Liu

Jiyuan Liu

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Yong Wang

Yong Wang

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Xinning Song

Xinning Song

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Dr. Xinchen Kang

Dr. Xinchen Kang

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Dr. Xiaofu Sun

Dr. Xiaofu Sun

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Dr. Qinggong Zhu

Corresponding Author

Dr. Qinggong Zhu

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

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Prof. Dr. Buxing Han

Corresponding Author

Prof. Dr. Buxing Han

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P. R. China

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062 P. R. China

Institute of Eco-Chongming, 20 Cuiniao Road, Chenjia Town, Chongming District, Shanghai, 202162 China

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First published: 19 July 2023
Citations: 12

Graphical Abstract

Indium nanoparticles on chitosan-derived N-doped defective graphene (In/N-dG) create bifunctional active centers that integrate chemical adsorption and electrocatalytic capabilities for CO2 electrolysis. The electrocatalyst demonstrated outstanding performance for the CO2 reduction reaction with a nearly 100 % Faradaic efficiency toward HCOOH across a wide potential window and with high current density.

Abstract

Realizing industrial-scale production of HCOOH from the CO2 reduction reaction (CO2RR) is very important, but the current density as well as the electrochemical potential window are still limited to date. Herein, we achieved this by integration of chemical adsorption and electrocatalytic capabilities for the CO2RR via anchoring In nanoparticles (NPs) on biomass-derived substrates to create In/X−C (X=N, P, B) bifunctional active centers. The In NPs/chitosan-derived N-doped defective graphene (In/N-dG) catalyst had outstanding performance for the CO2RR with a nearly 100 % Faradaic efficiency (FE) of HCOOH across a wide potential window. Particularly, at 1.2 A ⋅ cm−2 high current density, the FE of HCOOH was as high as 96.0 %, and the reduction potential was as low as −1.17 V vs RHE. When using a membrane electrode assembly (MEA), a pure HCOOH solution could be obtained at the cathode without further separation and purification. The FE of HCOOH was still up to 93.3 % at 0.52 A ⋅ cm−2, and the HCOOH production rate could reach 9.051 mmol ⋅ h−1 ⋅ cm−2. Our results suggested that the defects and multilayer structure in In/N-dG could not only enhance CO2 chemical adsorption capability, but also trigger the formation of an electron-rich catalytic environment around In sites to promote the generation of HCOOH.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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