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Electro‐ and Photocatalytic Generation of H 2 Using a Distinctive Co II “PN 3 P” Pincer Supported Complex with Water or Saturated Saline as a Hydrogen Source
Author(s) -
Rao Gyandshwar Kumar,
Pell Wendy,
Gabidullin Bulat,
Korobkov Ilia,
Richeson Darrin
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201704882
Subject(s) - aqueous solution , acetonitrile , pincer ligand , chemistry , pincer movement , catalysis , hydrogen , pyridine , photocatalysis , inorganic chemistry , electrochemistry , ligand (biochemistry) , hydrogen production , faraday efficiency , medicinal chemistry , photochemistry , electrode , organic chemistry , receptor , biochemistry
Efficient electrocatalytic production of H 2 from mixed water/acetonitrile solutions was achieved using three new Co II complexes supported by the neutral pincer ligand bis(diphenylphosphino)‐2,6‐di(methylamino)pyridine (“PN 3 P”). At −1.9 V vs. Fc/Fc + , these catalysts showed 96 % Faradaic efficiency with added water or saturated aqueous saline at rates of up to 316 L(mol cat) −1 (cm 2 ) −1 h −1 using a glassy carbon working electrode. The complex [Co(κ 3 ‐2,6‐{Ph 2 PNMe} 2 (NC 5 H 3 )Br 2 ] ( 1 ) was also able to photocatalytically reduce water to hydrogen in the presence of a Ru(bpy) 3 2+ photosensitizer and a reductant.