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Du J, Cheng B, Yuan H, Tao Y, Chen Y, Ming M, Han Z, Eisenberg R. Molecular Nickel Thiolate Complexes for Electrochemical Reduction of CO 2 to C 1-3 Hydrocarbons. Angew Chem Int Ed Engl 2023; 62:e202211804. [PMID: 36599806 DOI: 10.1002/anie.202211804] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 12/14/2022] [Accepted: 01/04/2023] [Indexed: 01/06/2023]
Abstract
We report the unprecedented electrocatalytic activity of a series of molecular nickel thiolate complexes (1-5) in reducing CO2 to C1-3 hydrocarbons on carbon paper in pH-neutral aqueous solutions. Ni(mpo)2 (3, mpo=2-mercaptopyridyl-N-oxide), Ni(pyS)3 - (4, pyS=2-mercaptopyridine), and Ni(mp)2 - (5, mp=2-mercaptophenolate) were found to generate C3 products from CO2 for the first time in molecular complex. Compound 5 exhibits Faradaic efficiencies (FEs) of 10.6 %, 7.2 %, 8.2 % for C1 , C2 , C3 hydrocarbons respectively at -1.0 V versus the reversible hydrogen electrode. Addition of CO to the system significantly promotes the FEC1-C3 to 41.1 %, suggesting that a key Ni-CO intermediate is associated with catalysis. A variety of spectroscopies have been performed to show that the structures of nickel complexes remain intact during CO2 reduction.
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Affiliation(s)
- Jiehao Du
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Banggui Cheng
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Huiqing Yuan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Yuan Tao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Ya Chen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Mei Ming
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Zhiji Han
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, 510275, Guangzhou, China
| | - Richard Eisenberg
- Department of Chemistry, University of Rochester, 14627, Rochester, NY, USA
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