Exhaust cleaning catalyst
AssigneeCataler Corporation
InventorsSatoru INODA, Akimasa HIRAI, Kenichi TAKI, Satoshi MATSUEDA
Life of this patent
Estimating the term…
Abstract
An exhaust cleaning catalyst, with which precious metal sintering is inhibited and which has greater exhaust cleaning abilities, has a substrate and a catalyst coating layer provided on the substrate. The catalyst coating layer has a precious metal that serves as an oxidation and/or reduction catalyst. The precious metal has Rh-containing metal particles in which rhodium (Rh) coexists with a base metal selected among platinum group elements excluding rhodium. The Rh-containing metal particles have an average rhodium content of 0.1% to 5% by mole with the total amount of the base metal and rhodium being 100% by mole.
Claims8
An exhaust cleaning catalyst comprising a substrate and a catalyst coating layer on the substrate, wherein
- the catalyst coating layer comprises a precious metal that serves as an oxidation and/or reduction catalyst, and a carrier that carries the precious metal,
- the precious metal comprises Rh-containing metal particles in which rhodium (Rh) coexists with a base metal selected among platinum group elements excluding rhodium, and
- the Rh-containing metal particles has an average rhodium content of 0.1% to 5% by mole with the total amount of the base metal and rhodium being 100% by mole based on energy dispersive X-ray spectrometry analysis of a scanning transmission electron microscopy image.
Dependencies are inferred from the claim text.