Catalytic articles
AssigneeBASF SE
InventorsShiang Sung, Markus Koegel, Bjoern Neumann, Patrick McCanty
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Abstract
Provided herein is a catalytic article including a catalytic coating disposed on a substrate, wherein the catalytic coating comprises a bottom coating on the substrate and a top coating layer on the bottom coating layer, one such coating layer containing a platinum group metal on a refractory metal oxide support and the other such coating layer containing a ceria-containing molecular sieve. Such catalytic articles are effective toward treating exhaust gas streams of internal combustion engines and exhibit outstanding resistance to sulfur.
Claims32
A catalytic article comprising a catalytic coating disposed on a substrate, wherein the catalytic coating comprises a bottom coating layer on the substrate and a top coating layer on the bottom coating layer, wherein:
- the bottom coating layer comprises a ceria-containing molecular sieve, and the top coating layer comprises a platinum group metal on a refractory metal oxide support;
- or
- the bottom coating layer comprises a platinum group metal on a refractory metal oxide support, and the top coating layer comprises a ceria-containing molecular sieve;
- and wherein the ceria in the ceria-containing molecular sieve is present from 20% to about 50% by weight, based on a total weight of the ceria-containing molecular sieve.
Dependencies are inferred from the claim text.