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Stabilization of a ...
Stabilization of a molecular water oxidation catalyst on a dye−sensitized photoanode by a pyridyl anchor
- Artikel/kapitelEngelska2020
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2020-09-14
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Springer Nature,2020
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-287897
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287897URI
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https://doi.org/10.1038/s41467-020-18417-5DOI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20210211
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Understanding and controlling the properties of water-splitting assemblies in dye-sensitized photoelectrosynthesis cells is a key to the exploitation of their properties. We demonstrate here that, following surface loading of a [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) chromophore on nanoparticle electrodes, addition of the molecular catalysts, Ru(bda)(L)2 (bda = 2,2′-bipyridine-6,6′-dicarboxylate) with phosphonate or pyridyl sites for water oxidation, gives surfaces with a 5:1 chromophore to catalyst ratio. Addition of the surface-bound phosphonate derivatives with L = 4-pyridyl phosphonic acid or diethyl 3-(pyridin-4-yloxy)decyl-phosphonic acid, leads to well-defined surfaces but, following oxidation to Ru(III), they undergo facile, on-surface dimerization to give surface-bound, oxo-bridged dimers. The dimers have a diminished reactivity toward water oxidation compared to related monomers in solution. By contrast, immobilization of the Ru-bda catalyst on TiO2 with the 4,4′-dipyridyl anchoring ligand can maintain the monomeric structure of catalyst and gives relatively stable photoanodes with photocurrents that reach to 1.7 mA cm−2 with an optimized, applied bias photon-to-current efficiency of 1.5%.
Ämnesord och genrebeteckningar
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NATURVETENSKAP Kemi hsv//swe
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NATURAL SCIENCES Chemical Sciences hsv//eng
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dye
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phosphonic acid derivative
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water
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catalyst
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chemical composition
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electrode
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hydrolysis
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immobilization
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ligand
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molecular analysis
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nanoparticle
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photochemistry
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Article
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chromatophore
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cyclic voltammetry
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dimerization
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electron transport
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gas chromatography
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impedance spectroscopy
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oxidation
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Wang, Degao
(författare)
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Huang, Qing
(författare)
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Du, Jian
(författare)
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Sun, Licheng,1962-KTH,Organisk kemi(Swepub:kth)u1umfd9h
(författare)
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Li, Fei
(författare)
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Meyer, Thomas J.
(författare)
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KTHOrganisk kemi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Nature Communications: Springer Nature11:12041-1723
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