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Composition Variation Between Cu-Ni Crystallites using TEM and EDS

Published online by Cambridge University Press:  28 February 2011

Pankaj K. Sinha  and
Timothy S. Cale
Pankaj K. Sinha
Affiliation:
Department of Chemical, Bio and Materials Engineering Arizona State University, Tempe, Arizona 85287
Timothy S. Cale
Affiliation:
Department of Chemical, Bio and Materials Engineering Arizona State University, Tempe, Arizona 85287
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Abstract

The distribution of nickel and copper between crystallites supported on high surface area silica (Cabosil HS5) has been studied using a Philips 400 series transmission electron microscope equipped with super twin lenses, a field emission gun and EDAX energy dispersive X-ray spectroscope. The same Ni-Cu catalysts have previously been characterized and used in cyclopropane hydrogenolysis kinetics. The good intercrystallite homogeneity found in a well reduced sample having 31% nominal copper validates a critical assumption made in these previous studies. Limited data on unreduced and partially reduced samples also highlight the need to carefully control the degree of reduction in kinetic and characterization studies.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 191
Copyright
Copyright © Materials Research Society 1988

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