Supported Mn₃O₄ nanosystems for hydrogen production through ethanol photoreforming
Barreca, Davide (Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia)
Bigiani, Lorenzo (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Monai, Mateo (Debye Institute for Nanomaterials Science)
Carraro, Giorgio (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Gasparotto, Alberto (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Sada, Cinzia (Università degli studi di Padova. Dipartimento di Fisica e Astronomia)
Martí-Sánchez, Sara (Institut Català de Nanociència i Nanotecnologia)
Grau Carbonell, Albert (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Maccato, Chiara (Università degli studi di Padova. Dipartimento di Scienze Chimiche)
Fornasiero, Paolo (Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia)

Date:	2018
Abstract:	Photoreforming promoted by metal oxide nanophotocatalysts is an attractive route for clean and sustainable hydrogen generation. In the present work, we propose for the first time the use of supported MnO nanosystems, both pure and functionalized with Au nanoparticles (NPs), for hydrogen generation by photoreforming. The target oxide systems, prepared by chemical vapor deposition (CVD) and decorated with gold NPs by radio frequency (RF) sputtering, were subjected to a thorough chemico-physical characterization and utilized for a proof-of-concept H₂ generation in aqueous ethanolic solutions under simulated solar illumination. Pure MnO nanosystems yielded a constant hydrogen production rate of 10 mmol h⁻¹ m⁻² even for irradiation times up to 20 h. The introduction of Au NPs yielded a significant enhancement in photocatalytic activity, which decreased as a function of irradiation time. The main phenomena causing the Au-containing photocatalyst deactivation have been investigated by morphological and compositional analysis, providing important insights for the design of Mn₃O₄-based photocatalysts with improved performances.
Grants:	Ministerio de Economía y Competitividad ENE2017-85087-C3 Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Chemical vapor depositions (CVD) ; Compositional analysis ; Hydrogen generations ; Hydrogen production rate ; Photocatalytic activities ; Physical characterization ; Radio-frequency sputtering ; Solar illumination
Published in:	Langmuir, Vol. 34, issue 15 (April 2018) , p. 4568-4574, ISSN 1520-5827

DOI: 10.1021/acs.langmuir.8b00642

Postprint 27 p, 2.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles