Journal ArticleDOI
Anatase-rutile transformation in fe/tio2, th/tio2 and cu/tio2 catalysts and its possible role in metal-support interaction
TLDR
In this article, it was shown that the anatase-rutile transformation of the TiO2 support is facilitated by the Fe2+ ions formed during the reduction process.Abstract:
Based onin-situ Mossbauer and X-ray diffraction studies, it is shown that in the Fe/TiO2 catalyst, the anatase-rutile transformation of the TiO2 support is facilitated by the Fe2+ ions formed during the reduction. The transformation occurs at lower temperatures in Th/TiO2 and Cu/TiO2 compared to pure TiO2. In general, the transformation of anatase to rutile seems to occur at or below the temperature (∼770 K) at which strong-metal-support-interaction manifests itself.read more
Citations
More filters
Journal ArticleDOI
Photoassisted hydrogen production from a water-ethanol solution: a comparison of activities of AuTiO2 and PtTiO2
TL;DR: A comparison of the photocatalytic activity for H 2 generation between Au and Pt was made in this paper, where the results showed that the overall activity of Au samples was generally about 30% lower than that of Pt samples.
Journal ArticleDOI
CO2Reforming of CH4over Supported Pt Catalysts
TL;DR: In this article, the kinetics of CO2reforming of CH4 were studied over Pt supported on TiO2, ZrO2 and Cr2O3, and the catalysts were characterized using chemisorption, X-ray diffraction, diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), temperature-programmed hydrogenation (TPH), and temperatureprogrammed surface reaction.
Journal ArticleDOI
Fe:CoTiO2 bimetallic catalysts for the Fischer-Tropsch reaction I. Characterization and reactor studies
TL;DR: In this paper, the effect of different iron loadings (0.1, 1, 5, 10%) on a 10% Co TiO 2 catalyst was studied by a range of surface and bulk characterization techniques, and the characterization studies revealed that the TiO2 systems do not differ significantly from SiO2 and Al2O3 supported, or alloy systems, reported elsewhere in the literature.
Journal ArticleDOI
Photoinduced hydrogen production from an aqueous solution of ethylene glycol over ultrafine gold supported on TiO2
TL;DR: In this paper, the effects of precursor calcination temperature, duration of irradiation, gold loading, concentration of ethylene glycol, initial pH and temperature on H 2 production were investigated.
Journal ArticleDOI
Photocatalytic degradation of o-cresol sensitized by iron–titania binary photocatalysts
TL;DR: In this paper, the degradation of ortho-cresol assisted by Fe/TiO2 photocatalysts was investigated in oxygenated aqueous suspension in a spiral glass flow reactor.
References
More filters
Journal ArticleDOI
Strong metal-support interactions: Occurrence among the binary oxides of groups IIA–VB
Samuel J. Tauster,S.C. Fung +1 more
TL;DR: In this paper, the authors discussed the need for a reducible, transition metal oxide support and on the basis of bonding mechanisms suggested by known compounds, showed that Iridium exhibits normal H2-chemisorption (typical of Ir Al 2 O 3 and Ir SiO 2 ) following reduction at 200 °C.
Journal ArticleDOI
Phase Transformation Studies in TiO2 Supporting Different Defect Mechanisms in Vacuum‐Reduced and Hydrogen‐Reduced Rutile
TL;DR: In this paper, it was shown that the rate of transformation is accelerated in hydrogen atmospheres and retarded in vacuum and this information, interpreted in terms of the defect structure of TiO2, supports data obtained by other investigators indicating that the mechanism by which nonstoichiometric rutile is formed depends upon the atmosphere in which reduction occurs.
Journal ArticleDOI
Mechanism of crystal structure transformations. Part 3. Factors affecting the anatase-rutile transformation
TL;DR: In this paper, the authors studied the kinetics of the transformation of anatase from titanium sulphate to rutile and found that the transformation becomes immeasurably slow below ~695±10°C compared to ~610°C for pure anatase.
Journal ArticleDOI
Behavior of Ti3+ centers in the low- and high-temperature reduction of Pt/TiO2, studied by ESR
T Huizinga,R Roel Prins +1 more
Journal ArticleDOI
The Mössbauer spectra of some spinel oxides containing iron
TL;DR: The Mossbauer spectrum of FeV 2 O 4 and Fe 2 VO 4 has been obtained as mentioned in this paper, which corresponds to that of ferrous iron in tetrahedral coordination, is a single line at 0.91±0.06 mm⧸sec with respect to a stainless-steel radiation source.