IR spectroscopic study of the surface of TiO/sub 2/ anatase modified with sulfuric acid

Journal Article · Sat Oct 01 00:00:00 EDT 1988 · Kinet. Catal. (Engl. Transl.); (United States)

OSTI ID:6334729

Khadzhiivanov, K I; Davydov, A A

The elevated activity of anatase modified with sulfuric acid, which is determined by the acidity of the catalyst, has been observed in reactions of acylation, esterification, and isomerization of cyclopropane. It was shown that the formation of surface sulfates in modification of anatase with sulfuric acid causes the appearance of Broensted acid centers which persist up to high dehydration temperatures and an increase in the strength of Lewis acid centers. The symmetry, structure, and sites of the surface sulfates were discussed. The Broensted acid centers are caused by mobile protons bound with sulfate ions.

• OSTI ID: 6334729
• Journal Information: Kinet. Catal. (Engl. Transl.); (United States), Vol. 29:2; Other Information: Translated from Kinet. Katal.; 29: No. 2, 460-465(Mar-Apr 1988)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
INFRARED SPECTRA
TITANIUM OXIDES
CATALYTIC EFFECTS
ABSORPTION SPECTRA
ADSORPTION
BROENSTED ACIDS
CHEMICAL ACTIVATION
LEWIS ACIDS
PH VALUE
STRUCTURAL CHEMICAL ANALYSIS
SULFURIC ACID
SURFACE PROPERTIES
SURFACE TREATMENTS
TITANIUM SULFATES
VIBRATIONAL STATES
CHALCOGENIDES
ENERGY LEVELS
EXCITED STATES
HYDROGEN COMPOUNDS
INORGANIC ACIDS
OXIDES
OXYGEN COMPOUNDS
SORPTION
SPECTRA
SULFATES
SULFUR COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties