# US 2014/0154160 A1 · Bimetallic catalyst > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154160 A1 - Document ID: US20140154160A1 - Status: Published application - Kind: A1 - Application number: 14/072,942 - Filed: 2013-11-06 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Johnson Matthey Public Limited Company - Applicants: Johnson Matthey Public Limited Company - Inventors: Janet Mary FISHER; David THOMPSETT - Web page: https://patentgrep.com/patent/US20140154160A1 ## CPC - F01N 3/2803: {characterised by structure, by material or by manufacturing of catalyst support} - B01D 53/94: by catalytic processes - B01D 53/944: {Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts (three-way-catalysts [TWC] B01D53/9445)} - B01J 23/52: Gold - B01J 23/66: Silver or gold - B01D 2255/1021: Platinum - B01D 2255/1025: Rhodium - B01D 2255/1026: Ruthenium - B01D 2255/106: Gold - B01D 2255/2042: Barium - B01D 2255/2061: Yttrium - B01D 2255/2063: Lanthanum - B01D 2255/2065: Cerium - B01D 2255/2066: Praseodymium - B01D 2255/2068: Neodymium - B01D 2255/20707: Titanium - B01D 2255/20715: Zirconium - B01D 2255/2073: Manganese - B01D 2255/20738: Iron - B01D 2255/20746: Cobalt - B01D 2255/20753: Nickel - B01D 2255/20761: Copper - B01D 2255/2094: Tin - Y02A 50/20: Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) - 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) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract An emission control catalyst composition comprising a supported bimetallic catalyst consisting of gold and a metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel is disclosed. Also disclosed is a catalytic convertor comprising a substrate monolith coated with the emission control catalyst composition and a lean burn internal combustion engine exhaust gas emission treatment system comprising the catalytic convertor. A variety of processes for preparing the catalyst composition are claimed. ## Claims ### Claim 1 An oxidation catalyst composition for controlling emissions, which composition comprises a support and a bimetallic catalyst consisting of gold and a second metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel, and wherein the bimetallic catalyst is supported on the support. ### Claim 2 (depends on 1) An oxidation catalyst composition according to claim 1 wherein the atomic ratio of the second metal to gold is from 100:1 to 1:100. ### Claim 3 (depends on 2) An oxidation catalyst composition according to claim 2 wherein the atomic ratio of the second metal to gold is from 95:5 to 5:95. ### Claim 4 (depends on 3) An oxidation catalyst composition according to claim 3 wherein the atomic ratio of the second metal to gold is from 95:5 to 25:75. ### Claim 5 (depends on 1) An oxidation catalyst composition according to claim 1 wherein the oxidation catalyst composition comprises a total amount (in weight %) of the second metal and gold of from 0.1 to 10% ### Claim 6 (depends on 1) An oxidation catalyst composition according to claim 1 wherein the second metal is platinum ### Claim 7 (depends on 1) An oxidation catalyst composition according to claim 1 wherein the support is a metal oxide support comprising a non-reducible metal oxide, a reducible metal oxide or a mixture thereof. ### Claim 8 (depends on 7) An oxidation catalyst composition according to claim 7 wherein the support comprises a non-reducible metal oxide selected from the group consisting of alumina, silica-alumina, zirconia, a zeolite and a mixture, composite oxide or mixed oxide of any two or more thereof. ### Claim 9 (depends on 8) An oxidation catalyst composition according to claim 8 wherein the non-reducible metal oxide is doped with 1 to 10% by weight of a basic metal selected from the group consisting of zirconium, lanthanum, aluminium, yttrium, praseodymium, cerium, barium and neodymium. ### Claim 10 (depends on 7) An oxidation catalyst composition according to claim 7 wherein the support comprises a reducible metal oxide selected from the group consisting of an oxide of manganese, an oxide of iron, an oxide of tin, an oxide of copper, an oxide of cobalt, an oxide of titanium and an oxide of cerium. ### Claim 11 (depends on 10) An oxidation catalyst composition according to claim 10 wherein the reducible metal oxide is an oxide of iron and/or an oxide of cerium. ### Claim 12 (depends on 10) An oxidation catalyst composition according to claim 10 wherein the reducible metal oxide is ceria. ### Claim 13 (depends on 10) An oxidation catalyst composition according to claim 10 wherein the support comprises a reducible oxide in combination with a stabiliser or a reducible oxide in combination with a non-reducible metal oxide as a composite or mixed oxide. ### Claim 14 (depends on 7) An oxidation catalyst composition according to claim 7 wherein the metal oxide support comprises a mixed oxide of particulate ceria with alumina or a composite oxide of particulate ceria with alumina. ### Claim 15 (depends on 1) An oxidation catalyst composition according to claim 1 wherein the support has a particle size of up to 50 nm. ### Claim 16 (depends on 1) A catalytic convertor comprising a substrate monolith coated with the oxidation catalyst composition of claim 1. ### Claim 17 (depends on 16) An apparatus comprising a lean burn combustion engine and an exhaust gas emission treatment system for a lean burn combustion engine, which system comprises the catalytic convertor of claim 16. ### Claim 18 (depends on 17) A vehicle comprising the apparatus of claim 17, and wherein the lean burn combustion engine is a lean burn internal combustion engine. ### Claim 19 (depends on 1) A process for preparing the oxidation catalyst composition of claim 1, which process comprises: (a) preparing a first solution comprising gold; (b) preparing a second solution comprising a second metal selected from the group consisting of platinum, rhodium, ruthenium, copper and nickel; and (c) applying the first solution and the second solution to a support. ### Claim 20 (depends on 1) A method of treating carbon monoxide (CO) in an exhaust gas from a lean burn combustion engine, which method comprises passing the exhaust gas over the oxidation catalyst composition of claim 1.