Low temperature infrared study of carbon monoxide adsorption on sulfated titania

Autor:	Helmut Knözinger, Helmut Schmelz, F. Lange, Konstantin Hadjiivanov
Rok vydání:	1992
Předmět:	chemistry.chemical_compound Ammonia chemistry Infrared Inorganic chemistry Infrared spectroscopy General Chemistry Lewis acids and bases Sulfate Catalysis Organometallic chemistry Carbon monoxide
Zdroj:	Catalysis Letters. 16:97-107
ISSN:	1572-879X 1011-372X
Popis:	Acidic properties of a TiO2 sample containing approximately 1 wt% S were examined by low-temperature IR spectroscopy of CO and by coadsorption of CO and NH3. Due to the almost negligible OH content of the sample, Bronsted acidity could not be detected. However, Lewis acid sites with enhanced acid strengths as compared to sulfate-free titania could clearly be detected. It is inferred that these sites (namely cus Ti4+ sites) are located in close proximity to sulfate groups and that CO (and NH3) coordinated to the Ti4+ sites interact with the sulfate groups presumably via electronic inductive effects.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8d7ea98c10784acaaa8fb5ef034cf67c https://doi.org/10.1007/bf00764359 Zobrazit plný text záznamu Full text from SpringerLink