Light-driven water oxidation using hybrid photosensitizer-decorated Co3O4 nanoparticles
De Tovar Villanueva, Jonathan (Universitat Autònoma de Barcelona. Departament de Química)
Romero Fernández, Nuria (Universitat Autònoma de Barcelona. Departament de Química)
Denisov, Sergey A. (Université Bordeaux. Institut des Sciences Moléculaires)
Bofill Arasa, Roger (Universitat Autònoma de Barcelona. Departament de Química)
Gimbert Suriñach, Carolina (Institut Català d'Investigació Química (Tarragona, Catalunya))
Ciuculescu-Pradines, Diana (Centre national de la recherche scientifique (França). Laboratoire de Chimie de Coordination)
Drouet, Samuel (Centre national de la recherche scientifique (França). Laboratoire de Chimie de Coordination)
Llobet Dalmases, Antoni (Universitat Autònoma de Barcelona. Departament de Química)
Lecante, Pierre (Centre national de la recherche scientifique. Centre d'Elaboration de Matériaux et d'Etudes Structurales)
Collière, Vincen (Centre national de la recherche scientifique (França). Laboratoire de Chimie de Coordination)
Freixa, Zoraida (Universidad del País Vasco. Departamento de Química Aplicada)
McClenaghan, Nathan (Université Bordeaux. Institut des Sciences Moléculaires)
Amiens, Catherine (Centre national de la recherche scientifique (França). Laboratoire de Chimie de Coordination)
García-Antón, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Philippot, Karine (Centre national de la recherche scientifique (França). Laboratoire de Chimie de Coordination)
Sala Román, Xavier (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2018
Resum:	Cobalt nanoparticles (NPs) have been prepared by hydrogenation of the organometallic complex [Co(η3-C8H13)(η4-C8H12)] in 1-heptanol in the absence of any other stabilizer and then transformed into Co3O4 NPs using mild oxidative reaction conditions. After deposition onto glassy carbon rotating disk electrodes, the electrocatalytic performance of the Co3O4 NPs in water oxidation has been tested in 1M NaOH. The activity has been benchmarked with that of state-of-the-art Co3O4 NPs through electrochemically-active surface area (ECSA) and specific current density measurements. Furthermore, the covalent grafting of photosensitive polypyridyl-based RuII complexes onto the surface of Co3O4 NPs afforded hybrid nanostructured materials able to photo-oxidize water into O2, while steady-state and time-resolved spectroscopic measurements gave some further insight into kinetics and pertinent reaction steps following excitation. These first-row transition metal oxide hybrid nanocatalysts display better catalytic performance than simple mixtures of non-grafted photosensitizers and Co3O4 NPs, thus evidencing the advantage of the direct coupling between the two entities for the photo-induced water oxidation reaction.
Ajuts:	Ministerio de Economía y Competitividad ENE2016-82025-REDT Ministerio de Economía y Competitividad CTQ2016-81923-REDC Ministerio de Economía y Competitividad CTQ2016-80058-R Ministerio de Economía y Competitividad CTQ2015-64261-R Ministerio de Economía y Competitividad CTQ2015-65268-C2-1-P Ministerio de Economía y Competitividad CTQ215-73028-EXP
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Co3O4 nanoparticles ; Water oxidation ; Dyad systems ; Electrocatalysis ; Photocatalysis
Publicat a:	Materials today energy, Vol. 9 (September 2018) , p. 506-515, ISSN 2468-6069

DOI: 10.1016/j.mtener.2018.07.008

Postprint 17 p, 1.2 MB

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