Investigation of the SMSI phenomenon with TiO sub 2 /Ru/SiO sub 2 model-dispersed catalysts. [Strong Metal Support Interaction]

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90051-5· OSTI ID:5679676

Badyal, J P.S.; Lambert, R M; Harrison, K; Riley, C C.A.; Frost, J C ^[1]

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1. Univ. of Cambridge (England) British Petroleum Research Centre, Sunbury-on-Thames, Middlesex (England)

The response of ternary SiO{sub 2}-supported Ru/TiO{sub 2} catalysts to a series of characteristic treatments has been examined in detail by chemisorption measurements, XPS, SIMS, and HREM observations, appropriate comparisons being made with binary Ru/SiO{sub 2} and Ru/TiO{sub 2} reference samples. The SMSI state is shown to be air-sensitive and the active highly dispersed phases on the ternary TiO{sub 2}/Ru/SiO{sub 2} catalysts exhibit SMSI behavior even after low-temperature reduction. SIMS and XPS data indicate that the SMSI condition does not involve intermixing of the Ru and TiO{sub 2} phases. Rather it is associated with highly dispersed metal entities whose XP spectra exhibit significant surface core-level binding energy shifts. Further aspects of the SMSI state are also discussed.

• OSTI ID: 5679676
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 129:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AIR
BINDING ENERGY
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISORPTION
COMPARATIVE EVALUATIONS
CONFIGURATION INTERACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
FLUIDS
GASES
ION MICROPROBE ANALYSIS
MASS SPECTROSCOPY
METALS
MICROANALYSIS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHOTOELECTRON SPECTROSCOPY
PLATINUM METALS
REDUCTION
RUTHENIUM
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SPECTRA
SPECTROSCOPY
SURFACE PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY