STM AND ESCA STUDIES OF PALLADIUM PARTICLES DEPOSITED ON A HOPG SURFACE

被引：42

作者：

SARTRE, A ^{[1
]}

PHANER, M ^{[1
]}

PORTE, L ^{[1
]}

SAUVION, GN ^{[1
]}

机构：

[1] ECOLE CENT LYON,F-69131 ECULLY,FRANCE

来源：

APPLIED SURFACE SCIENCE | 1993年 / 70-1卷

关键词：

D O I：

10.1016/0169-4332(93)90465-N

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The preparation of palladium catalyst particles deposited by ion exchange on the activated surface of highly oriented pyrolytic graphite (HOPG) has been investigated by STM and ESCA methods. Each step of the preparation procedure was characterized in a parallel way using the two techniques. After oxidation treatment of the graphite substrate chemical oxidized functions are revealed by ESCA, while STM images indicate that both chemical and physical sites are created. Ion exchange of a palladium salt solution with the activated carbon surface gives isolated particles. It appeared that the preliminary oxidation treatment conditions play an important role in the size and surface distribution of particles. These parameters are further modified by the final hydrogen reduction treatment which induces a migration of palladium which concentrates near physical sites.

引用

页码：402 / 406

页数：5

共 14 条

[1]

DONNET JB, 1976, CARBON BLACK PHYSICS

[2]

EHRBURGER P, 1981, 15TH BIENN C CARB, P254

[3] SCANNING TUNNELING MICROSCOPY OF SILVER, GOLD, AND ALUMINUM MONOMERS AND SMALL CLUSTERS ON GRAPHITE [J].