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US 10,183,276 B2Granted
Rhodium-containing catalysts for automotive emissions treatment
AssigneeBASF SE
InventorsAndrey Karpov, David Preli, Knut Wassermann, Andreas Sundermann, Sang-Il Choi, Younan Xia
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Abstract
Catalytic materials, and in particular, rhodium-containing catalytic materials for exhaust gas purifying catalyst composites are provided herein. Such materials comprise multimetallic Rh-containing nanoparticles, which are present primarily inside aggregated particles of a support (such as alumina). Such catalytic materials can exhibit excellent conversion of hydrocarbons and nitrogen oxides.
Claims40
A catalytic material comprising:
- a porous refractory metal oxide support in the form of aggregated particles;
- and
- a plurality of rhodium-containing multimetallic nanoparticles, wherein at least about 50% by weight of the nanoparticles are located inside the aggregated particles of the support.
A method of making a catalytic material, the method comprising:
- (a) obtaining rhodium-containing multimetallic nanoparticles;
- (b) obtaining a refractory metal oxide support;
- (c) preparing a solution of the nanoparticles of step (a) and the support of step (b) to form a catalytic material solution, wherein the support is in the form of aggregated particles;
- (d) drying and calcining the catalytic material solution of step (c) to form the catalytic material, wherein at least about 50% by weight of the rhodium-containing multimetallic nanoparticles are located inside the aggregated particles of the support and are thermally affixed to the support.
1 more element
Dependencies are inferred from the claim text.