The present invention provides a method for manufacturing an electro-catalytic honeycomb for controlling exhaust emissions, comprising steps of: providing a honeycomb structural frame including an outer surface, a plurality of airflow channels and a plurality of partition walls, and contacting the outer surface of the honeycomb structural frame with a molten metal to attach the molten metal in the plurality of partition walls to form a reducing environment. Accordingly, through the reducing environment in the partition wall and the oxidizing environment of a lean-burn exhaust contacted by a cathode, the electro-catalytic honeycomb generates an electromotive force between the partition wall and the cathode to drive the nitrogen oxides in the lean-burn exhaust to decompose at the cathode in order to control exhaust emissions.

Provided is a composition comprising a ceria-zirconia mixed oxide, the ceria-zirconia mixed oxide being surface-modified with a perovskite type compound of formula (I); wherein formula (I) is defined by A.sub.x-yA.sub.yB.sub.1-zB.sub.zO.sub.3; where: A is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd, and Gd; A is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd, and Gd; B is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag, and Ir; B is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag, and Ir; x is from 0.7 to 1; y is from 0 to 0.5; and z is from 0 to 0.5.

Provided is a composition comprising alumina, the alumina being surface-modified with a perovskite type compound of formula (I); wherein formula (I) is defined by A.sub.x-yA.sub.yB.sub.1-z B.sub.zO.sub.3; where: A is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd, and Gd; A is an ion of a metal selected from the group consisting of Li, Na, K, Cs, Mg, Sr, Ba, Ca, Y, La, Ce, Pr, Nd, and Gd; B is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag, and Ir; B is an ion of a metal selected from the group consisting of Cu, Mn, Mo, Co, Fe, Ni, Cr, Ti, Zr, Al, Ga, Sc, Nb, V, W, Bi, Zn, Sn, Pt, Rh, Pd, Ru, Au, Ag, and Ir; x is from 0.7 to 1; y is from 0 to 0.5; and z is from 0 to 0.5.

Provided in the present disclosure is a preparation method for a La.sub.1?xMn.sub.1+xO.sub.3 catalyst, comprising the steps: dissolving a lanthanum salt, a manganese salt, and a nonionic surfactant in solvent to obtain a precursor solution; drying the precursor solution to obtain a viscous solid; calcining the viscous solid to obtain a La.sub.1?xMn.sub.1+xO.sub.3 catalyst, wherein 0?x<1. The preparation method for a La.sub.1?xMn.sub.1+xO.sub.3 catalyst of the present disclosure is simple and easily performed, raw materials are easy to obtain, the operation is convenient, and the catalyst is suitable for mass production. Further, the La.sub.1?xMn.sub.1+xO.sub.3 catalyst prepared in the present disclosure has excellent performance in catalyzing oxidation of volatile organic compounds.

A diesel particulate filter coated with selective catalytic reduction includes: a support in which channels are formed from a front side to a rear side, a perovskite catalyst, and a selective catalytic reduction. In particular, the channels include an inlet channel which has an opened inlet and a closed outlet, and an outlet channel which is disposed adjacent to the inlet channel and has a closed inlet and an opened outlet. The perovskite catalyst is provided in an inner surface of the inlet channel, and the selective catalytic reduction is provided in an inner surface of the outlet channel. The perovskite catalyst is represented as La.sub.1-xAg.sub.xMnO.sub.3 (here, 0<X<1).

A noble metal-free lanthanum transition metal perovskite catalyst material. The noble metal-free lanthanum transition metal perovskite catalyst material may include a two phase mixture of a lanthanum transition metal perovskite with an alkali or alkaline earth metal carbonate, a lanthanum transition metal perovskite doped with an alkali or alkaline earth metal, or a combination thereof. The lanthanum transition metal perovskite catalyst material provides direct decomposition of NOx into N.sub.2 and O.sub.2 without the presence of a noble metal and in the presence of excess O.sub.2.

The present teaching rekates to providing a NOx decomposition agent having an excellent NOx decomposition rate. The NOx decomposition agent containing a perovskite oxide represented by ABx-1MxO.sub.3, wherein A represents one or more elements selected from the group consisting of La, Sr, Mg, Ca and Ba, B represents Mn, M represents a combination of one or more first metal elements selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Cr, Mo, W and Ce, and one or two second metal elements selected from the group consisting of Ca and Mg, and x represents a number greater than or equal to 0 and less than 1.

The present technology relates to perovskite materials for oxygen storage. In one aspect, the perovskite material includes at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): La.sub.xMO.sub.3 and formula (b): La.sub.(1-y)Sr.sub.yMO.sub.3, wherein: M is selected from the group consisting of Co, Cu, Fe, Mn and Ni; x is about 0.7 to about 1.1; and y is 0 to about 0.8, and wherein M, x, and y are independently variable for each one of said perovskite compounds. In one exemplary method, the perovskite materials of the technology are employed to treat automotive exhaust gas. In one embodiment, the perovskite materials are included in the washcoat of an automotive catalytic converter.

An exhaust gas purification catalyst includes: a first catalyst unit that consists of a hydrogen generating catalyst including a noble metal and an oxide that contains lanthanum, zirconium and an additional element such as neodymium; a second catalyst unit that consists of an oxygen storage/release material and a perovskite oxide disposed in contact with the oxygen storage/release material and represented by the general formula La.sub.xM1.sub.1-xM2O.sub.3-, where La is lanthanum, M1 is at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M2 is at least one element selected from the group consisting of iron (Fe), cobalt (Co) and manganese (Mn), x satisfies 0<x1, and satisfies 01; and a holding material that holds the first catalyst unit and the second catalyst unit in a mutually separated state.

A method for making a functional structural body includes a skeletal body of a porous structure composed of a zeolite-type compound, and at least one type of metallic nanoparticles present in the skeletal body, the skeletal body having channels connecting with each other, the metallic nanoparticles being present at least in the channels of the skeletal body.