Design, preparation and characterization of ruthenium dioxide/titanium dioxide catalytic surfaces active in photooxidation of water

Blondeel, G.; Harriman, A.; Porter, George; Urwin, D; Kiwi, J.

doi:10.1021/j100237a031

Cited by 67 publications

(36 citation statements)

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“…3,6,[18][19][20][21] Recently, a first attempt toward H2 production from water under UV excitation over RuO2/anatase-TiO2 nanocomposites was conducted, where an upward band bending at the RuO2-TiO2 interface has been proposed to explain the good performance of H2 evolution. 21 In addition, density functional calculations performed on RuO2/TiO2(110)…”

Section: Introductionmentioning

confidence: 99%

Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

et al. 2015

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The immobilization of miniscule quantities of RuO2 (~ 0.1%) onto one-dimensional (1D) TiO2 nanorods (NRs) allows H2 evolution from water under the irradiation of visible light.Rod-like rutile TiO2 structures, exposing preferentially (110) surfaces, are shown to be critical for the deposition of RuO2 to enable photocatalytic activity in the visible region. This performance is rationalized based on fundamental experimental studies and theoretical calculations, demonstrating that RuO2(110) grown as 1D nanowires on rutile TiO2(110), which occurs only at extremely low loads of RuO2, leads to the formation of a heterointerface that efficiently adsorbs visible light.

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Section: Introductionmentioning

confidence: 99%

Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

et al. 2015

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“…Then the product was calcined at different temperatures to obtain RuO 2 -TiO 2 . [10][11][12] The diffuse reflection spectra of the powders calcined at low temperatures using the latter method showed lower reflectance in the longwavelength region than those calcined at 1200 8C. [12] This result suggests that Ru ions are not effectively incorporated into the lattice of TiO 2 by calcination at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Study of the Efficiency of UV and Visible‐Light Photocatalytic Oxidation of Methanol on Mesoporous RuO₂–TiO₂ Nanocomposites

2011

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Mesoporous RuO(2)-TiO(2) nanocomposites at different RuO(2) concentrations (0-10 wt%) are prepared through a simple one-step sol-gel reaction of tetrabutyl orthotitanate with ruthenium(III) acetylacetonate in the presence of an F127 triblock copolymer as structure-directing agent. The thus-formed RuO(2)-TiO(2) network gels are calcined at 450 °C for 4 h leading to mesoporous RuO(2)-TiO(2) nanocomposites. The photocatalytic CH(3)OH oxidation to HCHO is chosen as the test reaction to examine the photocatalytic activity of the mesoporous RuO(2)-TiO(2) nanocomposites under UV and visible light. The photooxidation of CH(3)OH is substantially affected by the loading amount and the degree of dispersion of RuO(2) particles onto the TiO(2), which indicates the exclusive effect of the RuO(2) nanoparticles on this photocatalytic reaction under visible light. The measured photonic efficiency ξ=0.53% of 0.5 wt% RuO(2)-TiO(2) nanocomposite for CH(3)OH oxidation is maximal and the further increase of RuO(2) loading up to 10 wt% gradually decreases this value. The cause of the visible-light photocatalytic behavior is the incorporation of small amounts of Ru(4+) into the anatase lattice. On the other hand, under UV light, undoped TiO(2) shows a very good photonic efficiency, which is more than three times that for commercial photocatalyst, P-25 (Evonik-Degussa); however, addition of RuO(2) suppresses the photonic efficiency of TiO(2). The proposed reaction mechanism based on the observed behavior of RuO(2)-TiO(2) photocatalysts under UV and visible light is explored.

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“…RuO2 was deposited on Ti02 P25 by hydrolysis of RuC13 *H20 Alfa Ventron [4]. In order to determine the Ru02 particle diameter, TEM was carried out *.…”

Section: Methodsmentioning

confidence: 99%

“…Ru has been reported to exist with valence states 3+ to 8+ [20]. Intervention of an RuZt state is discarded since it is not easy to reduce the initial RuCl, used to prepare the catalyst [4] to Ru 2t. The d bands associated with Ru2+( [six d] electrons) [21] are at an energy level that is too high for this to occur.…”

mentioning

confidence: 99%

“…Oxidation of Ru to compounds with valence greater than four begins at 1.45 V, the redox potential of the Ce4+ ion containing solution [20]. In reaction (1) the corrosion of Ru02 is inhibited by stabilizing it on TiO2 [3,4]. Low initial Ce4+ (3.3 X 10T3 M) and RuO, concentrations (5 X 10vs M) as used in reaction (1) also make corrosion of a 3.07% RuO2 -Ti02 catalyst very unlikely.…”

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confidence: 99%

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EPR evidence for ruthenium variable valence states in active oxidative catalysts

Kiwi

Prins

1986

Chemical Physics Letters

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Design, preparation and characterization of ruthenium dioxide/titanium dioxide catalytic surfaces active in photooxidation of water

Cited by 67 publications

References 2 publications

Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

Study of the Efficiency of UV and Visible‐Light Photocatalytic Oxidation of Methanol on Mesoporous RuO₂–TiO₂ Nanocomposites

EPR evidence for ruthenium variable valence states in active oxidative catalysts

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Design, preparation and characterization of ruthenium dioxide/titanium dioxide catalytic surfaces active in photooxidation of water

Cited by 67 publications

References 2 publications

Visible Light-Driven H2 Production over Highly Dispersed Ruthenia on Rutile TiO2 Nanorods

Visible Light-Driven H2 Production over Highly Dispersed Ruthenia on Rutile TiO2 Nanorods

Study of the Efficiency of UV and Visible‐Light Photocatalytic Oxidation of Methanol on Mesoporous RuO2–TiO2 Nanocomposites

EPR evidence for ruthenium variable valence states in active oxidative catalysts

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Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

Visible Light-Driven H₂ Production over Highly Dispersed Ruthenia on Rutile TiO₂ Nanorods

Study of the Efficiency of UV and Visible‐Light Photocatalytic Oxidation of Methanol on Mesoporous RuO₂–TiO₂ Nanocomposites