Exhaust gas purifying catalyst and method for manufacturing the same
US6896857B2 · kind B2 · utility
16Cited by
25References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Nov 27, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying catalyst comprises a powder including a porous material having a specific surface area of 150 m2/g or more, cerium and platinum. Cerium and Platinum are loaded on the porous material. The powder has platinum dispersion of 70% or more before baking and platinum dispersion of 50% or more after baking in air at 700° C. Additionally, a reduction rate R of the platinum dispersion after the baking against the platinum dispersion before the baking is below 40%. The reduction rate R is represented by a following equation (1):R=(1−(Pt dispersion after baking)/(Pt dispersion before baking))×100 (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.