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New Cobalt‐Bisterpyridyl Catalysts for Hydrogen Evolution Reaction
Author(s) -
Aroua Safwan,
Todorova Tanya K.,
Mougel Victor,
Hommes Paul,
Reissig HansUlrich,
Fontecave Marc
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201700428
Subject(s) - overpotential , catalysis , cobalt , chemistry , redox , acetonitrile , ligand (biochemistry) , combinatorial chemistry , hydrogen , density functional theory , photochemistry , inorganic chemistry , computational chemistry , organic chemistry , electrochemistry , biochemistry , receptor , electrode
Preparation of a series of terpyridyl ligands bearing different substituents recently led to the synthesis of new cobalt‐bisterpyridyl complexes spanning over a wide range of redox potentials. In this work, we describe the catalytic properties of these complexes for the electroreduction of protons into hydrogen (hydrogen evolution reaction (HER)) in acetonitrile. The substituents of the ligands were found to greatly affect the catalytic performances of the systems, in terms of stability and overpotential. Interestingly, systems based on dimethylamino‐terpyridine derivatives perform HER with high efficiency, low overpotential and excellent stability. Density functional theory calculations were used to provide insights into the reaction mechanism of HER catalyzed by these systems, highlighting the role of the ligand for proton activation.