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Mössbauer and Exafs Study of 57Fe Labelled Pt/SiO2 Catalysts

Published online by Cambridge University Press:  28 February 2011

J. A. Sawicki ,
J. H. Rolston ,
S. R. Julian ,
T. Tyliszczak  and
K. D. McCrimmon
J. A. Sawicki
Affiliation:
Chalk River Nuclear Laboratories, Chalk River, Ontario KOJ 1JO, Canada
J. H. Rolston
Affiliation:
Chalk River Nuclear Laboratories, Chalk River, Ontario KOJ 1JO, Canada
S. R. Julian
Affiliation:
Department of Physics, University of Toronto, Toronto, Ontario MSS 1A7, Canada
T. Tyliszczak
Affiliation:
Materials Science Center, McMaster University, Hamilton, Ontario L8S 4M1, Canada
K. D. McCrimmon
Affiliation:
Chalk River Nuclear Laboratories, Chalk River, Ontario KOJ 1JO, Canada
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Abstract

Specimens of highly dispersed Pt/Silicalite catalyst, decorated with 57Fe by impregnation in aqueous ferric nitrate solution, have been studied after decoration, and various pretreatments including exposure to carbon monoxide, by in situ Mössbauer spectroscopy. The form of Pt was followed by EXAFS analysis near the Pt LIII edge. The microstructural studies were combined with CO chemisorption and infrared absorption measurements. It is observed that iron in Pt clusters is very reactive even at ambient temperatures and that the interaction of Fe with CO is strongly accelerated by platinum.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 65
Copyright
Copyright © Materials Research Society 1988

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