Exhaust purification catalyst
AssigneeCataler Corporation
InventorsKohei Takasaki, Tatsuya Ohashi, Keiichi Narita
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Abstract
The present invention provides an exhaust gas purification catalyst in which platinum group metal migration from a catalyst layer to a base material during high temperature duration is suppressed. The exhaust gas purification catalyst disclosed herein includes a base material, a catalyst layer, and an intermediate layer arranged between the base material and the catalyst layer. The base material contains SiC. The catalyst layer contains a platinum group metal as a catalyst component. The intermediate layer contains substantially no platinum group metal. A product of a thickness of the intermediate layer (μm) and a specific surface area (m2/g) of the intermediate layer is 1100 or more.
Claims3
An exhaust gas purification catalyst comprising:
- a base material;
- a catalyst layer;
- and
- an intermediate layer arranged between the base material and the catalyst layer, wherein
- the base material contains SiC,
- the catalyst layer contains a platinum group metal as a catalyst component,
- the platinum group metal contained in the catalyst layer is Pd,
- the intermediate layer contains substantially no platinum group metal, and
- a product of a thickness (μm) of the intermediate layer and a specific surface area (m2/g) of the intermediate layer is 1100 or more, further comprising an electrode, wherein
- the exhaust gas purification catalyst is an electrically heated catalyst.
Dependencies are inferred from the claim text.