Electronic structures of Au supported on TiO2

Okazaki, Koki; Ichikawa, Satoshi; Maeda, Yasushi; Haruta, Masatake; Kohyama, Masanori

doi:10.1016/j.apcata.2005.02.047

Cited by 98 publications

(84 citation statements)

References 55 publications

(64 reference statements)

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“…With the deposition of noble metals such as gold on the TiO 2 surface, the situation becomes even more complicated, because the resulting metal-metal oxide system displays a very unique electronic structure [17]. Furthermore, the catalytically active sites could be located on the gold nanoparticles, on the support, or at the metal-semiconductor interface [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

et al. 2017

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Section: Introductionmentioning

confidence: 99%

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

et al. 2017

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“…However, Haruta et al demonstrated that nanosized particles of gold impregnated on oxide supports possess a high catalytic activity [7]. As an example, oxidation of CO in air occurred at room temperature, when gold particles with an average size of 5 nm were used as reaction catalyst [8]. c-Alumina, being a stable compound with high surface area and extremely low affinity for hydrazine, may be a suitable support for gold particles in a wide pH range [9].…”

Section: Introductionmentioning

confidence: 98%

Catalytic Oxidative Decomposition of Hydrazine in Vapor Phase over Nanosized Au/γ‐Al₂O₃

Pakdehi

Sohrabi

2011

Chem Eng & Technol

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The catalytic activity of nanosized Au/c-Al 2 O 3 , synthesized by a deposition-precipitation process, on oxidative decomposition of hydrazine in air is discussed. The catalyst exhibited an excellent activity at low temperatures. The activity was strongly dependent upon the gold cluster size. The impacts of certain pertinent operating parameters including the particle size of the catalyst, temperature, hydrazine concentration, and feed flow rate on the extent of the reaction were investigated. The results were reproducible with a mean absolute deviation of 3 %. Deactivation of the catalyst during the reaction was found to be unlikely. Finally, a kinetic model based on the Eley-Rideal formulation was proposed for the reaction and a correlation was made between the data predicted from the model and those determined experimentally.

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“…Especially, we pointed out the importance of an oxygen-rich surface for the strong Au-support interaction [10][11][12]. Recently, detailed scanning tunneling microscopy (STM) analyses experimentally proved the strong interaction between Au and an oxygen adatom [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Migration of Au Nanoparticles on a TiO2(110) Surface in Reactant Gases Observed by In-Situ STM at Elevated Temperatures

Maeda

Kohyama

2011

e-J. Surf. Sci. Nanotechnol.

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Behavior of Au nanoparticles on a TiO2(110) cross-linked (1×2) surface under the atmosphere of reactant gases (CO, O2, CO+O2) at elevated temperatures was observed by scanning tunneling microscopy (STM). Au nanoparticles were grown larger by the thermal treatment in O2 or O2+CO atmosphere. In-situ STM in such oxidative atmosphere revealed that the migration of Au nanoparticles occurs associated with the oxidation of a TiO2 surface from cross-linked (1×2) to (1×1) structure. These results imply that the Au-Ti interaction is made unstable in real atmosphere of catalytic reactions, even if the unsaturated Ti species act as the initial nucleation sites.

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Electronic structures of Au supported on TiO2

Cited by 98 publications

References 55 publications

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

Catalytic Oxidative Decomposition of Hydrazine in Vapor Phase over Nanosized Au/γ‐Al₂O₃

Migration of Au Nanoparticles on a TiO2(110) Surface in Reactant Gases Observed by In-Situ STM at Elevated Temperatures

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Electronic structures of Au supported on TiO2

Cited by 98 publications

References 55 publications

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

Probing Oxide Reduction and Phase Transformations at the Au-TiO2 Interface by Vibrational Spectroscopy

Catalytic Oxidative Decomposition of Hydrazine in Vapor Phase over Nanosized Au/γ‐Al2O3

Migration of Au Nanoparticles on a TiO2(110) Surface in Reactant Gases Observed by In-Situ STM at Elevated Temperatures

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Catalytic Oxidative Decomposition of Hydrazine in Vapor Phase over Nanosized Au/γ‐Al₂O₃