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Preparation of rhodium catalysts on laminar and zeolitic structures by anchoring of organometallic rhodium
Author(s) -
Blanco C.,
Ruiz R.,
Pesquera C.,
González F.
Publication year - 2002
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.263
Subject(s) - rhodium , chemistry , catalysis , inorganic chemistry , dispersion (optics) , norbornadiene , metal , chemisorption , organic chemistry , physics , optics
Rhodium catalysts supported on six different aluminosilicate structures were prepared by hydrogen reduction of a cationic organometallic rhodium complex anchored to the support. The precursor active phase was incorporated in acetone medium through ion exchange using [Rh(Me 2 CO) x (NBD)]ClO 4 as the metal precursor species, in which NBD is 2,5‐norbornadiene and (Me 2 CO) x is acetone. The effect of the structure and characteristics of the support on metal load and dispersion was studied in the heterogeneous catalysts thus prepared. The supports were characterized by X‐ray diffraction, energy‐dispersive X‐ray analysis, volumetric adsorption and surface acidity. For the precursors and catalysts, the metal load was determined by UV–VIS spectra, the reduction temperature was determined by differential scanning calorimetry, and rhodium dispersion was measured by chemisorption. The structure of the materials used as supports had a great influence on the catalyst prepared. A higher metal content was achieved in the supports with laminar structures, whereas better dispersion was shown by the catalysts supported on zeolitic structures. Copyright © 2001 John Wiley & Sons, Ltd.

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