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Structure and Reactivity of Granular Noble Metal Catalysts

Published online by Cambridge University Press:  28 February 2011

H. W. Deckman ,
S. C. Fung ,
M. G. Matturro  and
J. A. McHenry
H. W. Deckman
Affiliation:
Corporate Research Laboratory, Exxon Research and Engineering Co., Rt. 22 East Annandale, NJ 08801
S. C. Fung
Affiliation:
Corporate Research Laboratory, Exxon Research and Engineering Co., Rt. 22 East Annandale, NJ 08801
M. G. Matturro
Affiliation:
Corporate Research Laboratory, Exxon Research and Engineering Co., Rt. 22 East Annandale, NJ 08801
J. A. McHenry
Affiliation:
Corporate Research Laboratory, Exxon Research and Engineering Co., Rt. 22 East Annandale, NJ 08801
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Abstract

The deactivation / reactivation behavior of fresh granular Pt metal catalysts supported on alumina is used to obtain information about the nature of catalytically activesites. It is found that relatively fresh catalysts can in some cases be reactivated by evolving only ∼1/100 of a monolayer of molecules off the Pt metal. This implies that either less than ∼1/100 of the surface is catalytically active with a site turnover frequency of greater than ∼100 reactions/(site-sec) orthat the reactivation process does not evolve small cracked molecules from the catalyticsites and involves some other physical or chemical change of the catalyst surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 585
Copyright
Copyright © Materials Research Society 1990

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References

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