Toyota Motor Engineering & Manufacturing North America, Inc.

Toyota Jidosha Kabushiki Kaisha

Krishna R Gunugunuri

Torin C Peck

Charles Alexander Roberts

Hongfei Jia

Chen Ling

Debasish Banerjee

Songtao Wu

Benjamin Alan Grayson

Blake A Graham

Ying Zhang

Li Qin Zhou

Naoto Nagata

Michael Jones

A method for forming a copper coated particles includes combining a precipitating agent with a solution comprising copper nitrate and particles to forming coated particles. The particles are cobalt oxide (CoO) or carbon black. The coated particles are washed to obtain washed coated particles, the washed coated particles are filtered to obtain filtered coated particles, the filtered coated particles are dried to obtain dried coated particles, and the dried coated particles are calcined to obtain the copper coated particles. The copper coated particles have a reflectivity of electromagnetic radiation in a visible spectrum that is less than or equal to 5%, and a reflectivity of electromagnetic radiation in a near-IR and LiDAR spectrum that is greater than or equal to 5%.

Near infrared reflective copper oxide coated particles

Catalyst material comprising a ternary spinel mixed oxide for treatment of an exhaust gas stream via direct decomposition removal of NOx to Nand O. The low temperature (from about 400° C. to about 650° C.), direct decomposition is accomplished without the need of a reductant molecule. In one example, Mn may be incorporated into metal oxide, such as CuCoOspinel oxide, synthesized using co-precipitation techniques.

Catalyst for direct NOx decomposition and a method for making and using the catalyst

A copper oxide coated pigment including a particle having an outer surface, and a layer of copper oxide on the outer surface. The pigment has a reflectivity of electromagnetic radiation in a visible spectrum less than or equal to 5%, and a reflectivity of electromagnetic radiation in a near-IR and LiDAR spectrum greater than or equal to 5%. The particle is cobalt oxide or carbon black. A method for forming copper oxide coated particles includes combining a precipitating agent with a solution of copper nitrate and particles, forming coated particles. The particles are cobalt oxide or carbon black. Washing the particles, obtaining washed coated particles, and filtering the washed coated particles, obtaining filtered coated particles. Drying the filtered coated particles, obtaining dried coated particles, and calcining the dried coated particles to form the copper oxide coated particles.

An oxygen storage material (OSM) includes a zinc manganese iron oxide (ZMF) and an alkali metal base on the ZMF surface. The ZMF has a spinel structure. The alkali metal containing ZMF can be formed to have a weight percent of alkali metal up to about two percent. The alkali metal carbonate is retained on the ZMF surface upon heating to a temperature greater than 1,000&#xb0; C. and stabilizes the ZMF to the cycling of an oxygen rich and oxygen lean atmosphere. The OSM additionally catalyzes the oxidation of hydrocarbons and CO and catalyzes the reduction of NOfor use in catalytic converters.

Zinc manganese-iron spinel with an alkali metal stabilizer as an oxygen storage material resistant to rich/lean aging

Catalyst material composed of a sodium incorporated cerium-zirconium based mixed oxide catalyst material, such as Ce&#x2014;Zr/AlO, for oxygen storage capacity applications. The sodium incorporated cerium-zirconium based mixed oxide catalyst material is synthesized by co-precipitation techniques using sodium carbonate as the precipitating agent and exhibits a high oxygen storage capacity.

Mixed oxide catalyst for oxygen storage applications and a method for making the catalyst

Methods of making an iron based catalyst using microwave hydrothermal synthesis are provided. The methods include dissolving iron(III) nitrate, Fe(NO), in an organic solvent to form a solution. Once dissolved, the methods include a step of neutralizing the solution with an alkaline mineralizing agent to obtain a precipitate. The solution with the precipitate is then subjected to microwave radiation to cause a temperature gradient and a hydrothermal crystallization process to form a synthesized product. The synthesized product is subsequently separated from the mineralizing agent. The method includes washing and drying the synthesized product to obtain particles of sodium iron oxide (NaFeO) catalyst that can be used as a composition for a passive NOadsorber. A two-stage NOabatement device for removal of NOfrom an exhaust gas stream during a cold start operation of an internal combustion engine is also provided.

Microwave synthesis of iron oxide catalysts for cold start NOremoval

Catalyst for oxygen storage capacity applications that include a zinc doped manganese-iron spinel mixed oxide material. The zinc doped manganese-iron spinel mixed oxide material may be synthesized by a co-precipitation method using a precipitation agent such as sodium carbonate and exhibits a high oxygen storage capacity.

Zinc doped manganese-iron spinel catalyst material and method of making and using the same

An improved catalyst system is provided for the direct decomposition removal of NOfrom an exhaust gas stream at temperatures between about 350&#xb0; C. and about 600&#xb0; C. that employs an (amorphous CuO)/CoOcatalyst. The catalyst has an amorphous CuOdeposit on the surfaces of particles of CoOspinel oxide. The catalyst is configured to reduce NOto Nwithout the presence of a reductant. The (amorphous CuO)/CoOcatalyst is formed by the precipitation of the deposit from solution onto a suspension of CoOspinel oxide particles. The catalyst system can be employed in a catalytic converter for the direct decomposition removal of NOfrom an exhaust gas stream flowing at a temperature of less than or equal to about 500&#xb0; C.

Direct no decomposition catalyst

NOabatement compositions include cobalt oxide (CoO) doped with cerium, and have an overall formula CoCeO, with cerium occupying tetrahedral and/or octahedral sites in the spinel structure. The NOabatement compositions possess NOstorage and NOdirect decomposition activity. Dual stage NOabatement devices include an upstream portion having the NOabatement composition to adsorb and store NOat low temperature, and then release the NOat higher temperature to a downstream catalytic conversion portion.

Passive NOx adsorption and decomposition

Passive NOadsorption (PNA) compositions have a formula Pd&#x2014;NiFeOwherein Pd represents a palladium component, such as palladium oxide, that is adsorbed on surfaces of the nickel ferrite. Such compositions can be synthesized by wet impregnation of nickel ferrite with a palladium salt, and exhibit efficient NOadsorption at low temperature, with NOdesorption occurring predominantly at high temperature. Two-stage NOabatement catalysts, effective under engine cold start conditions, include a PNA composition upstream from an NOconversion catalyst.

Palladium oxide supported on spinels for NOx storage

Catalysts including multi-transition metal doped copper-cobalt spinel mixed oxide catalyst materials for direct NOdecomposition with selectivity to Nfrom combustion engine exhaust, while minimizing formation of the NO product. In one example, the catalyst may include a ternary zinc-doped copper-cobalt spinel material or a quaternary manganese+zinc doped copper-cobalt spinel material. The catalysts are effective for reducing NO to Nat suitable temperatures of 350-500&#xb0; C., with and without excess Opresence.

Multi-transition metal doped copper-cobalt spinel catalyst material for NOdecomposition

An oxygen evolution catalyst of the formula: SrMCoOwhere M=Al, Ga wherein M is bonded with four oxygen atoms to form a tetrahedron. The catalyst is operated at a potential of less than 1.58 volts vs. RHE at a current density of 50 &#x3bc;A/cmfor a pH of 7-13. The catalyst is operated at a potential of less than 1.55 volts vs. RHE at a current density of 50 &#x3bc;A/cmand a pH of 13. The oxygen evolution catalyst of the formula: SrGaCoOwherein the catalyst is operated at a potential of less than 1.53 volts vs. RHE at a current density of 50 &#x3bc;A/cmand a pH of 7. The oxygen evolution catalyst of formula: SrGaCoOwherein the catalyst maintains a current within 94% after 300 minutes at a potential of 1.645 volts vs. RHE wherein the current is greater than 1 milliamp and a pH of 7.

Brownmillerite oxides for oxygen evolution catalyst

A method for forming a multilayer thin film having a crystalline metal oxide layer, the method including: encapsulating at least one encapsulated layer of the multilayer thin film in a wet chemical composition by wet chemical methods; and crystallizing the wet chemical composition by microwave hydrothermal treatment to form a crystalline metal oxide layer encapsulating the at least one encapsulated layer of the multilayer thin film.

Methods for forming crystalline metal oxide over structural color film using low heat

NOabatement compositions have a formula MCuFeO, wherein M is a substitution metal cation that can be any of cobalt, nickel, and zinc; and x is greater than zero and less than one. Such compositions can serve as direct decomposition catalysts and/or passive adsorption/storage components. Methods for synthesizing the compositions include alkaline precipitation of solutions containing nitrate salts of copper, iron, and at least one of cobalt, nickel, and zinc.

Modified ferrite catalysts for direct no decomposition and a method of making and using a catalyst

Active catalysts for the treatment of a low temperature exhaust gas stream are provided containing copper oxides dispersed on a spinel oxide for the direct, lean removal of nitrogen oxides from the exhaust gas stream. The low temperature, direct decomposition is accomplished without the need of a reductant molecule. In one example, CuOmay be dispersed as a monolayer on a metal oxide support, such as CoOspinel oxide, synthesized using an incipient wetness impregnation technique. The CuO/CoOcatalyst system converts nitric oxide to nitrogen gas with high product specificity, avoiding the production of a significant concentration of the undesirable NO product.

Growing community of inventors

Canton, MI, United States of America

Krishna R Gunugunuri