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[Fe(C5Ar5)(CO)2Br] complexes as hydrogenase mimics for the catalytic hydrogen evolution reaction
journal contributionposted on 2023-05-19, 09:30 authored by Hemming, EB, Chan, B, Turner, P, Corcilius, L, Price, JR, Michael GardinerMichael Gardiner, Masters, AF, Maschmeyer, T
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].
Publication titleApplied Catalysis B: Environmental
Department/SchoolSchool of Natural Sciences
Place of publicationAmsterdam, Netherlands
Rights statementCopyright 2017 Elsevier B.V. A