Electrocatalytic reduction of CO 2 with CCC-NHC pincer nickel complexes

A CCC-NHC pincer Ni(ii)Cl complex was prepared according to the metallation/transmetallation methodology. It was fully characterized by electrochemical, NMR spectroscopic, theoretical, and X-ray crystallographic methods. The complex and its cation were evaluated for electrocatalytic reduction of CO...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2017-08, Vol.53 (68), p.9442-9445
Main Authors: Cope, James D, Liyanage, Nalaka P, Kelley, Paul J, Denny, Jason A, Valente, Edward J, Webster, Charles Edwin, Delcamp, Jared H, Hollis, T Keith
Format: Article
Language:English
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Summary:A CCC-NHC pincer Ni(ii)Cl complex was prepared according to the metallation/transmetallation methodology. It was fully characterized by electrochemical, NMR spectroscopic, theoretical, and X-ray crystallographic methods. The complex and its cation were evaluated for electrocatalytic reduction of CO under a variety of conditions and found to provide some of the fastest catalytic rates and highest substrate selectivities (CO vs. H ) reported. Rates improved in the presence of water and, significantly, catalysis occurred at the first reduction potential, presumably at the Ni(i) state. Controlled potential electrolysis (CPE) was found to yield CO at 34% and formate at 47% Faradaic efficiency (FE).
ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc06537f