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Noble metal-free hydrogen-evolving photocathodes based on small molecule organic semiconductors

Abstract : Organic semiconductors have great potential for producing hydrogen in a sustainable and economically-viable manner because they rely on readily available materials with highly tunable properties. We demonstrate here the relevance of heterojunctions to the construction of H2-evolving photocathodes, exclusively based on earth-abundant elements. Boron subnaphthalocyanine chloride proved a very promising acceptor in that perspective. It absorbs a part of the solar spectrum complementary to α-sexithiophene as a donor, thus generating large photocurrents and providing a record onset potential for light-driven H2 evolution under acidic aqueous conditions using a nanoparticulate amorphous molybdenum sulfide catalyst.
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https://hal-cea.archives-ouvertes.fr/cea-01355285
Contributor : Serge Palacin <>
Submitted on : Monday, August 22, 2016 - 7:16:37 PM
Last modification on : Friday, July 10, 2020 - 7:58:46 AM

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Adina Morozan, Tiphaine Bourgeteau, Denis Tondelier, Bernard Geffroy, Bruno Jousselme, et al.. Noble metal-free hydrogen-evolving photocathodes based on small molecule organic semiconductors. Nanotechnology, Institute of Physics, 2016, 27 (35), pp.355401. ⟨10.1088/0957-4484/27/35/355401⟩. ⟨cea-01355285⟩

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