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The Characterization of Thin Platinum Films on Alumina

Published online by Cambridge University Press:  25 February 2011

E. I. Altman  and
R. J. Gorte
E. I. Altman
Affiliation:
University of Pennsylvania, Department of Chemical Engineering, Philadelphia, Pennsylvania 19104
R. J. Gorte
Affiliation:
University of Pennsylvania, Department of Chemical Engineering, Philadelphia, Pennsylvania 19104
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Abstract

Industrial metal catalysts are usually in the form of small metal particles supported on a porous oxide. The typical size of these metal particles ranges between 1.0 and 10.0 nm and it is well known that the particle size and the oxide substrate can affect the catalytic properties of the metal for some important reactions[1]. Previous work with adsorption on small particles has indicated that desorption temperatures[2–4] and the ability to dissociate CO[5,6] can also be affected by the particle size. To further investigate these size and substrate effects, we have examined the adsorption properties of several simple gases on small Pt particles supported on alumina using temperature programmed desorption (TPD). We will show that the desorption curves for CO, H2, and NO on these particles are very similar to curves measured on single crystals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 83: Symposium J – Physical and Chemical Properties of Thin Metal Overlayers and Alloy Surfaces , 1986 , 141
Copyright
Copyright © Materials Research Society 1987

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References

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