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[Fe(C5Ar5)(CO)2Br] complexes as hydrogenase mimics for the catalytic hydrogen evolution reaction

Hemming, EB, Chan, B, Turner, P, Corcilius, L, Price, JR, Gardiner, MG ORCID: 0000-0001-6373-4253, Masters, AF and Maschmeyer, T 2018 , '[Fe(C5Ar5)(CO)2Br] complexes as hydrogenase mimics for the catalytic hydrogen evolution reaction' , Applied Catalysis B: Environmental, vol. 223, no. SI , pp. 234-241 , doi: 10.1016/j.apcatb.2017.04.053.

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Abstract

A new iron-based hydrogenase mimic, [Fe(C5(p-C6H4Br)5)(CO)2Br], was synthesised and characterised using X-ray crystallography. Two analogous catalytic precursors, [Fe(C5Ar5)(CO)2Br] (Ar = C6H5; p-C6H4Br), were also analysed electrochemically in order to investigate how bulkier and more electron withdrawing C5Ar5 ligands affect the catalytic generation of hydrogen from trichloroacetic acid. Compared to previously reported iron-based cyclopentadienyl analogues, these complexes were found to have smaller overpotentials and larger turnover numbers. The [Fe(C5(p-C6H4Br)5)(CO)2Br] complex was found to be the most efficient of the two catalytic precursors with a turnover number of 25, an overpotential of around 310 mV and a faster rate of reaction compared to [Fe(C5Ph5)(CO)2Br].

Item Type: Article
Authors/Creators:Hemming, EB and Chan, B and Turner, P and Corcilius, L and Price, JR and Gardiner, MG and Masters, AF and Maschmeyer, T
Keywords: hydrogenase mimics, hydrogen evolution catalysts, electrochemistry, iron-based catalysts
Journal or Publication Title: Applied Catalysis B: Environmental
Publisher: Elsevier Science
ISSN: 0926-3373
DOI / ID Number: 10.1016/j.apcatb.2017.04.053
Copyright Information:

Copyright 2017 Elsevier B.V. A

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