High resolution transmission electron microscopy has been used to examine the crystallites in γ-Al2O3 and η-Al2O3. γ-Al2O3 has been found to be nearly hexagonally shaped crystallites whose identity distances and angles of fringe patterns indicate that (110) planes are preferentially exposed. η-Al2O3 showed preferentially exposed surfaces of (100), (110) and super imposed (111)/(211). This information is valuable to the catalyst researcher trying to model the surfaces of these two supports.
This is a preview of subscription content, log in to check access.
K. Wefers and G.M. Bell, Oxides and hydroxides of aluminum, Technical Paper No. 19, Aluminum Company of America, Pittsburgh, Pennsylvania, 1972.
J.B. Peri, J. Phys. Chem. 69 (1965) 220.
J.E. Dabronski, J.B. Butt and H. Bliss, J. Catal. 18 (1970) 297.
J.B. Butt and L.T. Starzec, J. Catal. 32 (1974) 99.
R. Hombek, J. Kijenski and S. Malinowsky, in:Preparation of Catalysts, eds. B. Delmon, P. Grange, P. Jacobs and G. Poncelet (Elsevier, New York, 1979).
B.C. Lippens, Thesis, Delft, 1961.
B.C. Lippens and J.J. Steggerda, in:Physical and Chemical Aspects of Adsorbents and Catalysts, ed. B.G. Linsen (Academic Press, New York, 1970) p. 171.
H. Knozinger and P. Ratnasamy, Catal. Rev.-Sci. Eng. 17 (1978) 31.
D.L. Cocke, E.D. Johnson and R.P. Merrill, Catal. Rev.-Sci. Eng. 26 (1984) 347.
S. Iijima, Japn. J. Appl. Phys., Part 2, 23 (1984) 347.
B.E. Yoldas, J. Appl. Chem. Biotechnol. 23 (1973) 803.
About this article
Cite this article
Reller, A., Cocke, D.L. High resolution transmission electron microscopic (HRTEM) determination of the preferentially exposed faces onγ-Al2O3 andη-Al2O3 . Catal Lett 2, 91–95 (1989). https://doi.org/10.1007/BF00774590
- Electron Microscopy
- Physical Chemistry
- Transmission Electron Microscopy