Influence of Alumina Surface Structure on Growth and Adsorption Properties of Pd Particles

I. Stará, V. Gonzalez, I. Jungwirthová, K. Mašek and V. Matolín
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I. Stará: Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague 8, Republic of Czech
V. Gonzalez: Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague 8, Republic of Czech
I. Jungwirthová: Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague 8, Republic of Czech
K. Mašek: Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague 8, Republic of Czech
V. Matolín: Department of Electronics and Vacuum Physics, Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 180 00 Prague 8, Republic of Czech

Surface Review and Letters (SRL), 1998, vol. 05, issue 01, 397-401

Abstract: The partial CO dissociation observed on small Pd particles deposited on γ-alumina and only molecular adsorption of CO on Pd/(0001) α-alumina model catalysts show that the surface structure of alumina can influence the reactivity of supported clusters. To understand the effect of metal–support interaction, Pd particles were deposited on alumina substrates of different surface structure [(0001), (1-102)]. The surface of alumina substrates was investigated by means of reflection high energy electron diffraction (BREED). The growth of Pd particles, their structure and orientation were observed by RHEED. In order to compare the catalytic properties of supported Pd particles, the study of CO and O adsorption was performed by temperature-programmed desorption (TPD) using molecular beam techniques.

Date: 1998
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DOI: 10.1142/S0218625X98000736

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