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Formation of Highly Dispersed Rhodium Particles by Chemical and Photochemical Reduction

Published online by Cambridge University Press:  15 February 2011

Zhibang Duan ,
M.J. Hampden-Smith ,
A. Datye ,
P.J. Nigrey ,
C. Quintana  and
A.P. Sylwester
Zhibang Duan
Affiliation:
Department of Chemistry, University of New Mexico, Albuquerque, NM 87131
M.J. Hampden-Smith
Affiliation:
Department of Chemistry, University of New Mexico, Albuquerque, NM 87131
A. Datye
Affiliation:
Department of Chemical Engineering, University of New Mexico, Albuquerque, NM 87131 Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque, NM 87131
P.J. Nigrey
Affiliation:
Division 6211, Sandia National Laboratories, Albuquerque, NM 87185.
C. Quintana
Affiliation:
Division 6211, Sandia National Laboratories, Albuquerque, NM 87185.
A.P. Sylwester
Affiliation:
Division 6211, Sandia National Laboratories, Albuquerque, NM 87185.
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Abstract

Nanometer-sized metal particles have been prepared by chemical and photochemical reduction of homogeneous solutions of metal-organic rhodium(I) compounds. Reduction of [(COD)RhCl]2 with LiBEt3H in THF resulted in the formation of solutions containing crystalline, mono-dispersed Rh particles with average sizes of 2–4nm as determined by TEM and SAXS. The species [(COD)RhH]4 was isolated during the formation of the Rh colloids but was found not to be an intermediate in the reduction of Rh(I) to Rh(0). The catalytic activity of these highly dispersed metals towards pyrene hydrogenation has been investigated. Photochemical reduction of [(ethylene)2Rh(OEt)]2 at room temperature also resulted in formation of Rh as shown by TEM, EDS, ED and X-ray diffraction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 272: Symposium O – Chemical Processes in Inorganic Materials: Metal and Semiconductor Clusters , 1992 , 109
Copyright
Copyright © Materials Research Society 1992

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References

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