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

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.
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Energy & Environmental Science, Royal Society of Chemistry, 2012, 5 (7), 〈http://pubs.rsc.org/-/content/articlelanding/2012/ee/c2ee21531d#!divAbstract〉. 〈10.1039/C2EE21531D〉
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http://hal.univ-brest.fr/hal-01559120
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Soumis le : lundi 10 juillet 2017 - 14:09:08
Dernière modification le : jeudi 11 janvier 2018 - 06:17:06

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François Quentel, Guillaume Passard, Frederic Gloaguen. Electrochemical hydrogen production in aqueous micellar solution by a diiron benzenedithiolate complex relevant to [FeFe] hydrogenases. Energy & Environmental Science, Royal Society of Chemistry, 2012, 5 (7), 〈http://pubs.rsc.org/-/content/articlelanding/2012/ee/c2ee21531d#!divAbstract〉. 〈10.1039/C2EE21531D〉. 〈hal-01559120〉

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