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Compositions of lean NO;trap (LNT) systems and methods of making and using same

  • US 9,517,448 B2
  • Filed: 10/22/2014
  • Issued: 12/13/2016
  • Est. Priority Date: 10/22/2013
  • Status: Active Grant
First Claim
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1. A coated substrate comprising:

  • a substrate;

    a washcoat layer comprising oxidative catalytically active micron-particles, the oxidative catalytically active micron-particles comprising oxidative composite nanoparticles bonded to a first micron-sized carrier particle, the oxidative composite nanoparticles comprising a first support nanoparticle and an oxidative catalytic nanoparticle;

    a washcoat layer comprising reductive catalytically active micron-particles, the reductive catalytically active micron-particles comprising reductive composite nanoparticles bonded to a second micron-sized carrier particle, the reductive composite nanoparticles comprising a second support nanoparticle and a reductive catalytic nanoparticle; and

    a washcoat layer comprising NOx trapping particles, the NOx trapping particles comprising a micron-sized cerium oxide-containing material.

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