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Quantitative electro-reduction of CO2 to liquid fuel over electro-synthesized metal–organic frameworks

DOI: 10.1021/jacs.0c05913 DOI Help

Authors: Xinchen Kang (University of Manchester) , Bin Wang (The University of Manchester) , Kui Hu (The University of Manchester) , Kai Lyu (The University of Manchester) , Xue Han (The University of Manchester) , Ben F. Spencer (The University of Manchester) , Mark D. Frogley (Diamond Light Source) , Floriana Tuna (The University of Manchester) , Eric J. L. Mcinnes (The University of Manchester) , Robert A. W. Dryfe (The University of Manchester) , Buxing Han (Institute of Chemistry, Chinese Academy of Sciences) , Sihai Yang (The University of Nottingham) , Martin Schroeder (The University of Manchester)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of The American Chemical Society

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 19171

Open Access Open Access

Abstract: Efficient electro-reduction of CO2 over metal–organic framework (MOF) materials is hindered by the poor contact between thermally synthesized MOF particles and the electrode surface, which leads to low Faradaic efficiency for a given product and poor electrochemical stability of the catalyst. We report a MOF-based electrode prepared via electro-synthesis of MFM-300(In) on an indium foil, and its activity for the electrochemical reduction of CO2 is assessed. The resultant MFM-300(In)-e/In electrode shows a 1 order of magnitude improvement in conductivity compared with that for MFM-300(In)/carbon-paper electrodes. MFM-300(In)-e/In exhibits a current density of 46.1 mA cm–2 at an applied potential of −2.15 V vs Ag/Ag+ for the electro-reduction of CO2 in organic electrolyte, achieving an exceptional Faradaic efficiency of 99.1% for the formation of formic acid. The facile preparation of the MFM-300(In)-e/In electrode, coupled with its excellent electrochemical stability, provides a new pathway to develop efficient electro-catalysts for CO2 reduction.

Journal Keywords: Electrical properties; Electrodes; Metal organic frameworks; Electrolysis; Electrolytes

Subject Areas: Materials, Chemistry

Instruments: B22-Multimode InfraRed imaging And Microspectroscopy