The influence of submonolayer silica on the surface properties of Y-alumina

I. Bertóti, G. Mink, G. Varsányi, T. Székely

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Silica was deposited onto the surface of calcined Y-alumina at 870-1140 K by the reaction with SiCl 4(g). The solid product was analysed by XPS and AAS. Comparison of the surface and bulk compositions revealed that deposited silica is located in the outermost layer. With increasing silica-content an increase of the O(1s), Si(2p) and Al(2p) binding energies occurs, indicating a continuous change of the electronic state of the surface. The Si-Auger parameter exhibits a maximum at about 3 at% Si/(Si+Al). Enhanced catalytic activity in n-hexane cracking reaction was observed for the samples with low Si-content. Correlation is established between the electronic state of Si and the catalytic activity of the samples.

Original languageEnglish
Pages (from-to)141-143
Number of pages3
JournalVacuum
Volume37
Issue number1-2
DOIs
Publication statusPublished - 1987

Fingerprint

Aluminum Oxide
Silicon Dioxide
surface properties
Surface properties
Alumina
aluminum oxides
Silica
Electronic states
silicon dioxide
catalytic activity
Catalyst activity
Hexane
Binding energy
electronics
X ray photoelectron spectroscopy
binding energy
products
Chemical analysis

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

The influence of submonolayer silica on the surface properties of Y-alumina. / Bertóti, I.; Mink, G.; Varsányi, G.; Székely, T.

In: Vacuum, Vol. 37, No. 1-2, 1987, p. 141-143.

Research output: Contribution to journalArticle

Bertóti, I. ; Mink, G. ; Varsányi, G. ; Székely, T. / The influence of submonolayer silica on the surface properties of Y-alumina. In: Vacuum. 1987 ; Vol. 37, No. 1-2. pp. 141-143.
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