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Photoproduction of Hydrogen by Decamethylruthenocene Combined with Electrochemical Recycling
Author(s) -
Rivier Lucie,
Peljo Pekka,
Vannay Laurent A. C.,
Gschwend Grégoire C.,
Méndez Manuel A.,
Corminboeuf Clémence,
Scanlon Micheál D.,
Girault Hubert H.
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201610240
Subject(s) - electrochemistry , hydride , chemistry , photosensitizer , photochemistry , hydrogen , quantum yield , tin , solvent , counterion , yield (engineering) , oxide , tin oxide , inorganic chemistry , electrode , organic chemistry , materials science , ion , fluorescence , physics , quantum mechanics , metallurgy
The photoinduced hydrogen evolution reaction (HER) by decamethylruthenocene, Cp 2 *Ru II (Cp*=C 5 Me 5 ), is reported. The use of a metallocene to photoproduce hydrogen is presented as an alternative strategy to reduce protons without involving an additional photosensitizer. The mechanism was investigated by (spectro)electrochemical and spectroscopic (UV/Vis and 1 H NMR) measurements. The photoactivated hydride involved was characterized spectroscopically and the resulting [Cp 2 *Ru III ] + species was electrochemically regenerated in situ on a fluorinated tin oxide electrode surface. A promising internal quantum yield of 25 % was obtained. Optimal experimental conditions— especially the use of weakly coordinating solvent and counterions—are discussed.

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