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Acid–base Properties of Supported Gallium Oxide Catalysts by A.L Petre; A Auroux; P Gélin; M Caldararu; N.I Ionescu is a Materials Science article available to read on EtoBox.

What is Acid–base Properties of Supported Gallium Oxide Catalysts about?

The acid±base properties of supported gallium oxide catalysts have been investigated by microcalorimetry and FTIR spectroscopy of pyridine (acidity) and CO 2 (basicity) adsorption. Pyridine adsorption microcalorimetry has shown that loading supports such as g-Al 2 O 3 , TiO 2 , and ZrO 2 with gallium oxide in a surface concentration close to the theoretical monolayer, resulted in a decrease of the surface acidity of the catalysts compared to that of the supports, while, in the case of SiO 2 , new Lewis acid sites were created. The number of acid sites for the supported and bulk gallium oxide catalysts was in the following order: This order is related to the degree of dispersion of gallium oxide on the surface of each support and to the interaction between guest and host oxides. Two types of Lewis acid sites were identi®ed by pyridine adsorption, corresponding to the support and the supported gallium oxide, respectively. The catalysts displayed very weak basicity, except for the samples supported on zirconia and alumina.

Who reads Acid–base Properties of Supported Gallium Oxide Catalysts?

Author

A.L Petre; A Auroux; P Gélin; M Caldararu; N.I Ionescu

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0040-6031)

Published

2001

Language

EN

Field

Materials Science (Physical Sciences)