US 2018/0021756 A1 · PLATINUM GROUP METAL (PGM) CATALYSTS FOR AUTOMOTIVE EMISSIONS TREATMENT

Abstract

Catalytic materials for exhaust gas purifying catalyst composites comprise platinum group metal (PGM)-containing catalysts whose PGM component(s) are provided as nanoparticles and are affixed to a refractory metal oxide, which may be provided as a precursor. Upon calcination of the catalysts, the PGM is thermally affixed to and well-dispersed throughout the support. Excellent conversion of hydrocarbons and nitrogen oxides can advantageously be achieved using such catalysts.

Claims23

Dependent claims

A catalytic material comprising:

a porous refractory metal oxide support, wherein the support is in particulate form and has an average primary particle size of about 1 nm to about 100 nm as measured by Transmission Electron Microscopy (TEM);
and
a platinum group metal (PGM) component in nanoparticle form dispersed throughout the support;
wherein the average primary particle size of the PGM component is about 10 nm to about 92 nm as measured by TEM.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/546,953Filed 29 Jan 2016

Priority

29 Jan 2015

Published

25 Jan 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification43 codes

B01J 23/44
Of the platinum group metals: palladium
B01D 53/945
Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]:…
B01J 21/04
Boron or aluminium; Oxides or hydroxides thereof: alumina
B01J 23/40
Of noble metals: of the platinum group metals

Platinum group metal (pgm) catalysts for automotive emissions treatment

Life of this patent

Platinum group metal (pgm) catalysts for automotive emissions treatment

Life of this patent

Abstract

Claims23