Abstract
ON the hypothesis of the free-radical structure of heterogeneous catalysts1,2, the mechanism of many catalytic reactions has been deduced in recent years3. In order to explain the action of the γ-aluminium oxide (Al2O3)/platinum contact, the structure of the radical γ-Al2O3 (ref. 4) as an active transient phase with structural defects should be considered. The model formula of the non-active oxide Al2O3 can be represented as follows: O=Al—O—Al=O. The active γ-Al2O3 contains the radicals: O=Al—and—O—Al=O. Though this formula could be written in several similar forms, because Al2O3 is a macro-molecular compound, only two types of radical can be expected, namely, R=Al— (electron donor) and R=Al—O— (electron acceptor).
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Krause, A., and Krach, H., Ber. dtsch. chem. Ges., 69, 2709 (1936). Krause, A., in Alexander's “Colloid Chemistry”, 7, 175 (New York, 1950).
Wolkenstein, T., J. Chim. Phys., 181 (1957).
Krause, A., Przemysl chem., 28, 267 (1949); Przeglad chem., 6, No. 5–6, 129 (1948); Bull. Soc. des Amis Sci. Lettres de Poznan, B, 12, 67 (1953); B, 13, 111, 155 (1956).
Krause, A., Bull. Soc. des Amis Sci. Lettres de Poznan, B, 12, 67 (1953).
Krause, A., Bull. Soc. des Amis Sci. Lettres de Poznan, B, 13, 111 (1956).
Trzebiatowski, W., and Kubicka, H., Roczniki chem., 32, 3 (1958).
Krause, A., Poznanskie Towarzystwo Przyjaciól Nauk, prace Komisji mat.-przyrodniczej, A, V., 3, 163 (1948).
Kobozev, N. I., Yevdokimov, V. B., Zubovitch, I. A., and Malcev, A. N., J. Phys. Chem. U.S.S.R., 26, 1349 (1953). Malcev, A. N., and Kobozev, N. I., ibid., 29, 142 (1955).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
KRAUSE, A. Structure and Mode of Action of the Contact γ-Aluminium Oxide/Platinum. Nature 183, 1615–1616 (1959). https://doi.org/10.1038/1831615b0
Issue Date:
DOI: https://doi.org/10.1038/1831615b0
This article is cited by
-
Struktur und Wirkungsweise des Fe/?-Al2O3/K2O-Katalysators bei der Ammoniaksynthese
Die Naturwissenschaften (1960)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
