High‐Resolution Images of Pd Particles Supported on Highly Oriented Pyrolytic Graphite and Glassy Carbon

Ultrafine metal particles dispersed on supporting materials have been developed as catalysts for the oxidation of automobile exhaust gas, the hydrogenation of carbon monoxide, and electrodes of fuel cells. Both activities and selectivities of these reactions depend on the morphology of the dispersed...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1994-09, Vol.141 (9), p.2511-2513
Main Authors: Murakami, Yasushi, Naoi, Katsuo, Yahikozawa, Kiyochika, Takasu, Yoshio
Format: Article
Language:English
Subjects:
400201 - Chemical & Physicochemical Properties
CARBON
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CONVERTERS
CHEMICAL REACTIONS
DATA
DEPOSITION
DIRECT ENERGY CONVERTERS
ELECTROCATALYSTS
ELECTROCHEMICAL CELLS
ELEMENTS
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
FUEL CELLS
INFORMATION
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
METALS
MORPHOLOGY
NONMETALS
NUMERICAL DATA
PALLADIUM
PLATINUM METALS
POLLUTION CONTROL EQUIPMENT
PYROLYTIC CARBON
SURFACE PROPERTIES
TRANSITION ELEMENTS
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Summary:Ultrafine metal particles dispersed on supporting materials have been developed as catalysts for the oxidation of automobile exhaust gas, the hydrogenation of carbon monoxide, and electrodes of fuel cells. Both activities and selectivities of these reactions depend on the morphology of the dispersed metal. The morphology of palladium particles supported on both highly oriented pyrolytic graphite (HOPG) and glassy carbon was studied using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The particles on the HOPG were linked with neighboring particles to agglomerate, while the particles on the glassy carbon were circular. AFM data with tapping mode for the palladium particles on HOPG were consistent with the high-resolution SEM image. Although the lateral resolution of the AFM image was lower than that for the high-resolution SEM data, the AFM image clearly indicated the height distribution of the agglomerates.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2055152