Ru-bis(pyridine)pyrazolate (bpp)-Based Water-Oxidation Catalysts Anchored on TiO2
Three distinct functionalisation strategies have been applied to the in, in-[{RuII(trpy)}2(μ-bpp)(H2O)2]3+ (trpy=2,2':6',2''-terpyridine, bpp=bis(pyridine)pyrazolate) water-oxidation catalyst framework to form new derivatives that can adsorb onto titania substrates. Modifications...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:289044 |
| Acceso en línea: | https://ddd.uab.cat/record/289044 https://dx.doi.org/urn:doi:10.1002/chem.201504015 |
| Access Level: | acceso abierto |
| Palabra clave: | Organic-inorganic hybrid materials Redox chemistry Ruthenium Supported catalysts Surfaces and interfaces Water splitting SDG 7 - Affordable and Clean Energy |
| Sumario: | Three distinct functionalisation strategies have been applied to the in, in-[{RuII(trpy)}2(μ-bpp)(H2O)2]3+ (trpy=2,2':6',2''-terpyridine, bpp=bis(pyridine)pyrazolate) water-oxidation catalyst framework to form new derivatives that can adsorb onto titania substrates. Modifications included the addition of sulfonate, carboxylate, and phosphonate anchoring groups to the terpyridine and bis(pyridyl)pyrazolate ligands. The complexes were characterised in solution by using 1D NMR, 2D NMR, and UV/Vis spectroscopic analysis and electrochemical techniques. The complexes were then anchored on TiO2-coated fluorinated tin oxide (FTO) films, and the reactivity of these new materials as water-oxidation catalysts was tested electrochemically through controlled-potential electrolysis (CPE) with oxygen evolution detected by headspace analysis with a Clark electrode. The results obtained highlight the importance of the catalyst orientation with respect to the titania surface in regard to its capacity to catalytically oxidize water to dioxygen. |
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