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Compositions for passive NOx adsorption (PNA) systems and methods of making and using same

  • US 9,687,811 B2
  • Filed: 03/19/2015
  • Issued: 06/27/2017
  • Est. Priority Date: 03/21/2014
  • Status: Active Grant
First Claim
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1. A coated substrate comprising:

  • a substrate; and

    a Passive NOx Adsorber (PNA) layer comprising nano-sized platinum group metal (PGM) on a plurality of support particles comprising cerium oxide, wherein the amount of cerium oxide used in the PNA layer is from about 50 g/L to about 400 g/L.

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