PALLADIUM SOLID SOLUTION CATAYST AND METHODS OF MAKING
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Abstract
Disclosed are three-way catalysts that are able to simultaneously convert nitrogen oxides, carbon monoxide, and hydrocarbons in exhaust gas emissions into less toxic compounds. Also disclosed are three-way catalyst formulations comprising palladium (Pd)-containing oxygen storage materials. In some embodiments, the three-way catalyst formulations of the invention do not contain rhodium. Further disclosed are improved methods for making Pd-containing oxygen storage materials. The relates to methods of making and using three-way catalyst formulations of the invention.
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Citations
23 Claims
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13. A method of making the oxygen storage material (OSM) comprising a metal oxide doped with at least one transition metal, wherein said transition metal and OSM are present as a solid solution, comprising:
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1) adding an amount of transition metal salt to an aqueous slurry of milled OSM; and 2) adding an amount of base to generate an IWCP-OSM slurry. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. (canceled)
Specification