CATALYTIC ARTICLE WITH SEGREGATED WASHCOAT AND METHODS OF MAKING SAME
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United States of America Patent
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Jul 21, 2016
app pub date -
Feb 3, 2016
filing date -
Feb 3, 2016
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Abstract
Provided herein are catalytic articles and methods of making same using a single coat process. The catalytic article comprises an elongated substrate monolith having a plurality of longitudinally extending passages, each passage having at least a first surface and a second surface opposite the first surface, the first and second surfaces coated with at least a first coating and a second coating, wherein the first coating comprises a first catalyst composition and overlies the second coating on the first surface, the second coating comprises a second catalyst composition and overlies the first coating on the second surface, and wherein the first catalyst composition and second catalyst composition have a difference in surface charge. The washcoat may be applied as one slurry, which then self-segregates into two coatings.
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