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Distinct Proton and Water Reduction Behavior with a Cobalt(III) Electrocatalyst Based on Pentadentate Oximes
Author(s) -
Basu Debashis,
Mazumder Shivnath,
Shi Xuetao,
Staples Richard J.,
Schlegel H. Bernhard,
Verani Cláudio N.
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201501410
Subject(s) - catalysis , electrocatalyst , chemistry , protonation , cobalt , ligand (biochemistry) , oxime , solvent , inorganic chemistry , metal , proton , organic chemistry , ion , electrochemistry , biochemistry , physics , receptor , electrode , quantum mechanics
A new pentadentate oxime has been designed to drive the preferential coordination favored by Co I in catalysts used for proton/water reduction. The ligand incorporates water upon metal coordination and is water soluble. This Co III species is doubly reduced to Co I and exhibits H + reduction activity in the presence of weak acids in MeCN and evolves H 2 upon protonation suggesting that the ligand design increases catalyst effectiveness. Superior catalysis is observed in water with a turnover number (TON) of 5700 over 18 h. However, the catalyst yields Co‐based nanoparticles, indicating that the solvent media may dictate the nature of the catalyst.