A Binuclear Iron-Thiolate Catalyst for Electrochemical Hydrogen Production in Aqueous Micellar Solution

Abstract : The substituted iron–thiolate complex [Fe2(μ-bdt)(CO)4{P(OMe)3}2] (bdt=benzenedithiolate) is an active catalyst for electrochemical hydrogen production in aqueous sodium dodecyl sulfate solution, with a high apparent rate constant of 4×106 M−1 s−1. The half-peak potential for catalysis of proton reduction is less negative than −0.6 V versus the standard hydrogen electrode at pH 3. Voltammetric data are consistent with the rate of electrode reaction controlled by diffusion. A mechanism that begins with the rapid protonation of the iron–thiolate catalyst is proposed. The Faradaic efficiency in diluted HCl solutions is close to 100 %, but the catalytic activity decayed after about twelve turnovers when electrolysis was carried out in the presence of acetic acid.
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Chemistry - A European Journal, Wiley-VCH Verlag, 2012, 18 (42), pp.13473 - 13479. 〈http://onlinelibrary.wiley.com/doi/10.1002/chem.201201884/full〉. 〈10.1002/chem.201201884〉
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http://hal.univ-brest.fr/hal-01556797
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Soumis le : mercredi 5 juillet 2017 - 15:31:14
Dernière modification le : jeudi 11 janvier 2018 - 06:17:06

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François Quentel, Guillaume Passard, Frederic Gloaguen. A Binuclear Iron-Thiolate Catalyst for Electrochemical Hydrogen Production in Aqueous Micellar Solution. Chemistry - A European Journal, Wiley-VCH Verlag, 2012, 18 (42), pp.13473 - 13479. 〈http://onlinelibrary.wiley.com/doi/10.1002/chem.201201884/full〉. 〈10.1002/chem.201201884〉. 〈hal-01556797〉

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