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Thermal stability of copper-manganese spinel as Zero PGM catalyst for TWC application

  • US 9,731,279 B2
  • Filed: 10/30/2014
  • Issued: 08/15/2017
  • Est. Priority Date: 10/30/2014
  • Status: Expired due to Fees
First Claim
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1. A zero platinum group metal (ZPGM) catalyst system comprising:

  • a substrate,a washcoat layer overlying the substrate,an overcoat layer overlying the washcoat layer, said overcoat layer consisting of ZrO2

    Pr6O11, andan impregnation layer deposited on a surface of the overcoat layer;

    wherein the impregnation layer comprises a spinel according to the formula CuxMn3-xO4 or CuxCoyMn3-x-yO4, wherein X and Y are each independently 0.01 to 1.0, wherein the catalyst system has been aged at about 850°

    C.

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