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![Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F55858.jpg&w=3840&q=50)
Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
Nickel(ii) PE1CE2P pincer complexes (E = O, S) for electrocatalytic proton reduction
Sandeep Kaur-Ghumaan1, Patrick Hasche2, Anke Spannenberg2
1Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Str. 29a, 18059 Rostock, Germany. skaur@chemistry.du.ac.in torsten.beweries@catalysis.de and Department of Chemistry, University of Delhi (North Campus), New Delhi-110007, India.
Abstract:
Nickel(ii) chloride and thiolate complexes with iPrPE1CE2PiPr (E = O, S) pincer ligands were investigated as electrocatalysts for the hydrogen evolution reaction in CH3CN in the presence of acetic acid and trifluoroacetic acid. The bis(thiophosphinite) (S,S) chloride complex reduced protons at the lowest overpotential in comparison with the bis(phosphinite) (O,O) and mixed phosphinite-thiophosphinite (O,S) complexes. A combination of electrochemical, NMR and UV-vis spectroscopic and mass spectrometric experiments provides mechanistic insights into the catalytic cycle for proton reduction to dihydrogen.
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