Surface structure and acidity of alumina-boria catalysts

Both surface borate structures and acidities of alumina-boria catalysts prepared by supporting B 2O 3 (boria) on an alumina support were investigated by using both 11B magic angle spinning (MAS) NMR measurements and temperature-programmed desorption (TPD) of adsorbed pyridines, together with the cat...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 1995-12, Vol.104 (2), p.171-177
Main Authors: Sato, Satoshi, Kuroki, Masakatsu, Sodesawa, Toshiaki, Nozaki, Fumio, Maciel, Gary E.
Format: Article
Language:English
Subjects:
11B MAS NMR
Acid sites
Alumina-boria
Brønsted acid sites
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Both surface borate structures and acidities of alumina-boria catalysts prepared by supporting B 2O 3 (boria) on an alumina support were investigated by using both 11B magic angle spinning (MAS) NMR measurements and temperature-programmed desorption (TPD) of adsorbed pyridines, together with the catalytic properties of these alumina-boria materials for 1-butene isomerization. The concentrations of tetrahedral oxygen-coordinated borate (BO 4) species as well as number of Brønsted acid sites were found to increase with increasing boria content. The catalytic activity for 1-butene isomerization was found to be caused by the strong Brønsted acid sites generated from BO 4 species on the surface of alumina.
ISSN:1381-1169
1873-314X
DOI:10.1016/1381-1169(95)00105-0