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Issue 7, 2012
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Electrochemical hydrogen production in aqueous micellar solution by a diiron benzenedithiolate complex relevant to [FeFe] hydrogenases

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Abstract

The diiron hydrogenase model Fe2(bdt)(CO)6 (1, bdt = benzenedithiolate) was dispersed in an aqueous micellar solution prepared from sodium dodecyl sulfate (SDS). The aqueous solution of 1 showed no sign of decomposition when left in contact with air over a period of several days. Current–potential responses recorded at a dropping mercury electrode over pH 7–3 were consistent with reduction of freely diffusing species. Catalysis of proton reduction was observed at pH < 6 with current densities exceeding 0.5 mA cm−2 at an acid-to-catalyst ratio of 17. Bulk electrolysis at −0.66 V vs. SHE of a solution of 1 at pH 3 confirmed the production of hydrogen with Faradaic efficiency close to 100%. A mechanism involving initial reduction of 1 and subsequent proton-coupled electron transfer is proposed.

Graphical abstract: Electrochemical hydrogen production in aqueous micellar solution by a diiron benzenedithiolate complex relevant to [FeFe] hydrogenases

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Publication details

The article was received on 31 Oct 2011, accepted on 11 Jan 2012 and first published on 04 Apr 2012


Article type: Paper
DOI: 10.1039/C2EE21531D
Energy Environ. Sci., 2012,5, 7757-7761

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    Electrochemical hydrogen production in aqueous micellar solution by a diiron benzenedithiolate complex relevant to [FeFe] hydrogenases

    F. Quentel, G. Passard and F. Gloaguen, Energy Environ. Sci., 2012, 5, 7757
    DOI: 10.1039/C2EE21531D

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