Bi-metallic three-way catalyst materials and appurtenant devices and systems
US11446637B2 · kind B2 · utility
1Cited by
12References
20Claims
0Family size
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Key dates
| Filing date | Jun 18, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Dec 16, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Bimetallic three-way catalyst devices include a support body, one or more Rh bulk deposits disposed on the support body, and a plurality of Pt atomic clusters disposed on the surface of each of the Rh bulk deposits. Substantially no Pt is deposited on the support body. At least 85% by weight of the Pt atomic clusters comprise up to 10 atoms and the maximum Pt atomic cluster size is 200 Pt atoms. The combined loading of Rh and Pt can be less than 1.5% by weight relative to the weight of the support body. The molar ratio of Rh in a bulk Rh deposit to Pt disposed on the surface of that deposit is at least 5:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.