Abstract
Double oxides of Rh and Ni have been prepared by chemical mixing methods. Silica-supported and unsupported RhNbO 4 and NiNb 2O 6 catalysts exhibited strong metal-oxide interaction behaviors in ethane hydrogenolysis activities after the decomposition of the double oxides by H 2 reduction at 500°C. Silica-supported and zeolite-supported RhVO 4 catalysts showed high activity and selectivity for dehydrogenation of cyclohexane after the decomposition in H 2. The double-oxide catalyst systems can be used as starting materials to obtain high-performance metal catalysts (redispersion of metals by H 2 reduction and regeneration of catalysts by calcination at a high temperature).
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