Hydrogen Evolution Mediated by Cobalt Diimine‐Dioxime Complexes: Insights into the Role of the Ligand Acid/Base Functionalities. | Zendy

Sun Dongyue | Zendy; Karippara Harshan Aparna | Zendy; Pécaut Jacques | Zendy; HammesSchiffer Sharon | Zendy; Costentin Cyrille | Zendy; Artero Vincent | Zendy

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Hydrogen Evolution Mediated by Cobalt Diimine‐Dioxime Complexes: Insights into the Role of the Ligand Acid/Base Functionalities.

Author(s) -

Sun Dongyue,

Karippara Harshan Aparna,

Pécaut Jacques,

HammesSchiffer Sharon,

Costentin Cyrille,

Artero Vincent

Publication year - 2021

Publication title -

chemelectrochem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 59

ISSN - 2196-0216

DOI - 10.1002/celc.202100413

Subject(s) - diimine , protonation , cobalt , ligand (biochemistry) , chemistry , catalysis , hydride , intramolecular force , proton , hydrogen , photochemistry , medicinal chemistry , stereochemistry , inorganic chemistry , organic chemistry , receptor , physics , ion , biochemistry , quantum mechanics

The benchmarking of the performance for H 2 evolution of cobalt diimine‐dioxime catalysts is provided based on a comprehensive study of their catalytic mechanism. The latter follows an ECE'CC pathway with intermediate formation of a Co(II)‐hydride intermediate and second protonation possibly at a basic site of the ligand, acting as a proton relay. This suggests an intramolecular coupling between the hydride and protonated ligand as the proton concentration‐independent rate‐determining step controlling the turnover frequency for H 2 evolution.

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