FORMATION OF SURFACE DIPOLES FOR SMALL PALLADIUM CLUSTERS DEPOSITED ONα-(0001)Al2O3

S. Ogawa and S. Ichikawa
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S. Ogawa: Advanced Research Laboratory, Hitachi Ltd, Hatoyama, Saitama, 350–03, Japan
S. Ichikawa: Advanced Research Laboratory, Hitachi Ltd, Hatoyama, Saitama, 350–03, Japan;

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 973-977

Abstract: The Kelvin-probe method is utilized to measure the work function of a single-crystal aluminum covered with palladium clusters. It is found that formation of interface dipoles occurs by charge transfer fromAl2O3to Pd clusters, particularly for those less than 2 nm in diameter. These results provide valuable clue to the understanding of metal-support electronic interactions, which is important in catalysis.

Date: 1996
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DOI: 10.1142/S0218625X96001741

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