Exhaust gas control catalyst
US11426710B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 4, 2020 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Nov 4, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y30/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure relates to an exhaust gas control catalyst including a base and a catalyst coating layer having a two-layer structure on the base. The catalyst coating layer includes a lower layer on the base, and an upper layer on the lower layer. The upper layer of the catalyst coating layer contains Rh particles in which a mean particle diameter measured by observation using a transmission electron microscope is 1.0 nm or more and 2.0 nm or less and a particle-diameter standard deviation σ is 0.8 nm or less. A length of the upper layer from an end face on a downstream side in an exhaust gas flow direction falls within a range of 70% or more and 100% or less of a total length of the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.