Planar models of alumina based catalysts-ion beam characterization of anion stabilized amorphous alumina Conference Paper uri icon


  • Alumina is one of the most important materials in petroleum processing heterogeneous catalysts. The transitional aluminas have surfaces with chemical defects which are catalytically active or act as attachment sites for active phases. The preparation of aluminas with planar configurations are aiding in the efforts at characterization of the chemistry and structure of alumina surfaces via modern surface probes. Amorphous alumina is of interest since it is expected to have high concentrations of these defects. In our work to discover the means and mechanisms of amorphous alumina stabilization and their preparation in planar configuration we have been examining the incorporation of anionic species into the alumina structure. The catalytically interesting molybdate, tungstate chromate, and rhenate ions have been incorporated into electrochemically grown films. These have been examined by the ion spectroscopies (ISS, SIMS and RBS) and XPS. The surprising nature and distribution of the incorporated species and their role in amorphous phase stabilization will be discussed.

published proceedings

  • Preprints Symposia

author list (cited authors)

  • Cocke, D. L., Kormali, S. M., Murphy, O. J., Schweikert, E. A., Halverson, D. E., Polansky, C., & Leite, C.

complete list of authors

  • Cocke, DL||Kormali, SM||Murphy, OJ||Schweikert, EA||Halverson, DE||Polansky, C||Leite, CVB

publication date

  • December 1984