# US 2014/0194281 A1 · Nox purification catalyst

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0194281 A1
- Document ID: US20140194281A1
- Status: Published application
- Kind: A1
- Application number: 14/209,379
- Filed: 2014-03-13
- Published: 2014-07-10
- Earliest claimed: 2014-03-13
- Assignees: Cambridge Enterprise Limited; Toyota Jidosha Kabushiki Kaisha
- Inventors: Mayuko OSAKI; Hirohito HIRATA; Naoyuki HARA; Brian JOHNSON; Andrew WHEATLEY; Helen SKELTON; Muriel LEPAGE
- Web page: https://patentgrep.com/patent/US20140194281A1

## CPC

- B01J 23/892: {Nickel and noble metals}
- B01D 53/9418: {for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas}
- B01J 35/393: {Metal or metal oxide crystallite size}
- B01J 35/45: Nanoparticles
- B01J 37/0018: {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)}
- B01D 2255/106: Gold
- B01D 2255/20753: Nickel
- B01J 2235/00: Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J 2235/15: X-ray diffraction
- B01J 2235/30: Scanning electron microscopy; Transmission electron microscopy
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES

## Abstract

The invention relates to a catalyst able to exhibit an NOX purification performance at a low temperature and/or in an oxidizing atmosphere, that is, a nitrogen oxide purification catalyst including gold atoms and nickel atoms in a solid and a state of close proximity.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim 8

The nitrogen oxide purification catalyst for purifying NOx in an exhaust gas by concentrating the catalyst with the exhaust gas at a temperature including the range of 350 to 500° C. comprising gold atoms and nickel atoms in a solid supported on a metal oxide carrier and in an alloyed state, wherein an average particle size of said solid is 1.5 to 5.5 nm.

### Claim 9 (depends on 8)

A catalyst as set forth in claim 8, wherein the composition of said gold and nickel in said solid is Au:Ni=7:93-91:9 (at %).

### Claim 10 (depends on 8)

A catalyst as set forth in claim 8, wherein the composition of said gold and nickel in said solid is Au:Ni=20:80-80:20 (at %).

### Claim 11 (depends on 8)

A catalyst as set forth in claim 8, wherein the composition of said gold and nickel in said solid is Au:Ni=40:60-60:40 (at %).