Anion-regulation engineering toward Cu/In/MOF bimetallic electrocatalysts for selective electrochemical reduction of CO2 to CO/formate

Bingqing Xu; Israr Masood Ul Hasan; Luwei Peng; Junyu Liu; Nengneng Xu; Mengyang Fan; Nabeel Khan Niazi; Jinli Qiao

Materials Reports: Energy (Aug 2022)

Anion-regulation engineering toward Cu/In/MOF bimetallic electrocatalysts for selective electrochemical reduction of CO2 to CO/formate

Bingqing Xu,
Israr Masood Ul Hasan,
Luwei Peng,
Junyu Liu,
Nengneng Xu,
Mengyang Fan,
Nabeel Khan Niazi,
Jinli Qiao

Affiliations

Bingqing Xu: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
Israr Masood Ul Hasan: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
Luwei Peng: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
Junyu Liu: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
Nengneng Xu: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Corresponding author.
Mengyang Fan: Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, M5S 3G8, Canada
Nabeel Khan Niazi: Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan; Corresponding author.
Jinli Qiao: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Corresponding author. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.

Journal volume & issue: Vol. 2, no. 3
p. 100139

Abstract

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The conversion of carbon dioxide (CO2) into high-value added energy fuels and chemicals (CO, formate, C2H4, etc.) through electrochemical reduction (eCO2R) is a promising avenue to sustainable development. However, low selectivity, barren activity and poor stability of the electrodes hinder the large-scale application of eCO2R. Herein, we reported a copper-indium-organic-framework (CuIn-MOF) based high-performance catalyst for eCO2R. Electrochemical measurement results reveal that CuIn-MOF exhibits high Faradaic efficiency (FE) of CO and formate (300 mV, FECO = 78.6% at −0.86 V vs. RHE, FEHCOO− = 48.4% at −1.16 V vs. RHE, respectively) in a broad range of current density (20.1–88.4 mA cm−2) with long-term stability (6 h) for eCO2R in 0.5 M KHCO3 electrolyte solution. Specifically, through anion-regulation engineering, SO42− anion precursor is more beneficial for the formic acid generation than NO3− anion precursor; while for SO42− anion precursor, Cu plays a positive regulating role in eCO2R to CO compared to In. Additionally, the high performance in a home-made eCO2R reactor derives benefit from enhanced intrinsic activity and charge re-distribution can be attributed to the formation of In-doped Cu layer.

Published in Materials Reports: Energy

ISSN: 2666-9358 (Online)
Publisher: KeAi Communications Co. Ltd.
Country of publisher: China
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.keaipublishing.com/en/journals/materials-reports-energy/

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