The effect of rhodium precursor on Rh/Al2O3 catalysts
- 1 January 1982
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 76 (1), 20-25
- https://doi.org/10.1063/1.442760
Abstract
The infrared spectra of the CO/Rh/Al2O3 system have been examined following several different means of preparing the supported rhodium catalyst. Rhodium precursor materials including RhCl3 ⋅ 3H2O, Rh(NO3)3 ⋅ 2H2O, Rh6(CO)16, [Rh(OCOCH3)2]2, and Rh2(SO4)3 have been compared as to their tendencies to produce upon reduction the various CO/Rh/Al2O3 species generally attributed to this catalytic system. The nitrate and carbonyl precursors are most easily reduced to rhodium metal. The acetate and sulfate anions poison the Rh/Al2O3 surface through decomposition during reduction leading to very minimal CO adsorption. The catalytic properties of Rh/Al2O3 could be quite dependent upon the nature of rhodium precursor chosen.Keywords
This publication has 20 references indexed in Scilit:
- Site distribution studies of Rh supported on Al2O3—An infrared study of chemisorbed COThe Journal of Chemical Physics, 1981
- CO hydrogenation over clean and oxidized rhodium foil and single crystal catalysts. Correlations of catalyst activity, selectivity, and surface composition*1Journal of Catalysis, 1980
- A chemical and physical characterization of alumina-supported Rh6(CO)16Journal of Catalysis, 1980
- Surface interaction between H2 and CO2 on Rh/Al2O3, studied by adsorption and infrared spectroscopic measurementsJournal of Catalysis, 1980
- An ESCA study of rhodium(III)-exchanged zeolite catalystsJournal of Catalysis, 1980
- Formation of a supported-metal catalyst by aggregation of rhodium complexesJournal of Catalysis, 1980
- Infrared spectroscopic study of activated surface processes: CO chemisorption on supported RhThe Journal of Chemical Physics, 1979
- Surface-supported metal cluster carbonyls. Chemisorption decomposition and reactivity of hexadecacarbonylhexarhodium supported on alumina, silica-alumina, and magnesiaInorganic Chemistry, 1979
- Ultradispersed rhodium rafts: Their existence and topologyJournal of Catalysis, 1979
- Infrared spectra of chemisorbed CO on Rh/γ–Al2O3: Site distributions and molecular mobilityThe Journal of Chemical Physics, 1978