A pentacyclic quinoid dye, KuQ(O)(3)OH, combining (i) extended visible absorption up to 600 nm, (ii) excited state reduction potential >2 V vs. NHE, and (iii) a photoinduced proton-coupled electron transfer mechanism, has been used for the fabrication of dye-sensitized SnO2 photoanodes integrating a ruthenium polyoxometalate water oxidation catalyst. The resulting photoelectrode SnO2 vertical bar KuQ(O)(3)OH vertical bar-Ru4POM displays a light harvesting efficiency up to 90% in the range 500-600 nm, an onset potential as low as 0.2 V vs. NHE at pH 5.8, photoinduced oxygen evolution with a faradaic efficiency of 70 +/- 15% and an absorbed-photon-to-current efficiency up to 0.12 +/- 0.01%.

Volpato, G.a., Marasi, M., Gobbato, T., Valentini, F., Sabuzi, F., Gagliardi, V., et al. (2020). Photoanodes for water oxidation with visible light based on a pentacyclic quinoid organic dye enabling proton-coupled electron transfer. CHEMICAL COMMUNICATIONS, 56(15), 2248-2251 [10.1039/c9cc09805d].

Photoanodes for water oxidation with visible light based on a pentacyclic quinoid organic dye enabling proton-coupled electron transfer

Sabuzi F.;Conte V.;Galloni P.;
2020-01-01

Abstract

A pentacyclic quinoid dye, KuQ(O)(3)OH, combining (i) extended visible absorption up to 600 nm, (ii) excited state reduction potential >2 V vs. NHE, and (iii) a photoinduced proton-coupled electron transfer mechanism, has been used for the fabrication of dye-sensitized SnO2 photoanodes integrating a ruthenium polyoxometalate water oxidation catalyst. The resulting photoelectrode SnO2 vertical bar KuQ(O)(3)OH vertical bar-Ru4POM displays a light harvesting efficiency up to 90% in the range 500-600 nm, an onset potential as low as 0.2 V vs. NHE at pH 5.8, photoinduced oxygen evolution with a faradaic efficiency of 70 +/- 15% and an absorbed-photon-to-current efficiency up to 0.12 +/- 0.01%.
2020
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/06 - CHIMICA ORGANICA
English
Volpato, G.a., Marasi, M., Gobbato, T., Valentini, F., Sabuzi, F., Gagliardi, V., et al. (2020). Photoanodes for water oxidation with visible light based on a pentacyclic quinoid organic dye enabling proton-coupled electron transfer. CHEMICAL COMMUNICATIONS, 56(15), 2248-2251 [10.1039/c9cc09805d].
Volpato, Ga; Marasi, M; Gobbato, T; Valentini, F; Sabuzi, F; Gagliardi, V; Bonetto, A; Marcomini, A; Berardi, S; Conte, V; Bonchio, M; Caramori, S; Ga...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/245196
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