Abstract: An exhaust gas-purifying catalyst includes first particles of oxygen storage material, second particles of one or more rare-earth elements other than cerium and/or compounds thereof interposed between the first particles, and third particles of one or more precious metal elements interposed between the first particles, wherein a spectrum of a characteristic X-ray intensity for one of the rare-earth element(s) and a spectrum of a characteristic X-ray intensity for one of the precious metal element(s) that are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a length of 500 nm have a correlation coefficient of 0.68 or more.

Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.

Abstract: A catalyst charge for ammonia oxidation, including the Andrussow process, comprises a first stage ammonia oxidation catalyst capable of oxidizing 20 to 99% of designed ammonia throughput, to produce a first stage product gas comprising unreacted ammonia, oxygen and nitrogen oxides, and a second stage ammonia oxidation catalyst capable of completing the oxidation of unreacted ammonia. Low levels of nitrous oxide are produced an extended campaign lengths may be seen.

Abstract: Exemplary embodiments of the present invention relate to the processing of hydrocarbon-containing feedstreams in the presence of an interstitial metal hydride comprising a surface, with a metal oxide integrally synthesized and providing a coating on the surface of the interstitial metal hydride. The catalysts and processes of the present invention can improve overall hydrogenation, product conversion, as well as sulfur and nitrogen reduction in hydrocarbon feedstreams.

Abstract: Exemplary embodiments of the present invention relate to the processing of hydrocarbon-containing feedstreams in the presence of an active catalyst component comprising a surface, and a metal oxide film coated on the surface of the active catalyst component. The catalysts and processes of the present invention can improve overall hydrogenation, product conversion, as well as improved resistance to catalytic deactivation due to sulfur and nitrogen compounds present in the hydrocarbon feedstreams.

Abstract: According to a first embodiment of a production method of an oxidation catalyst device for exhaust gas purification of the present invention, a plurality of slurries containing a catalyst precursor prepared from mutually different organic acids is coated respectively on a porous filter carrier (2) and calcined. According to a second embodiment of the present invention, the slurry contains the catalyst precursor having a particle diameter distribution ranging from 0.5 to 10 ?m, and the slurry has a viscosity equal to or below 2.0 mPa·s. The oxidation catalyst device of the present invention is composed of a composite metal oxide on a surface of a cell division and a surface of an air pore of the porous filter carrier having a wall-flow structure.

Abstract: An oxidation process employing a mechanically stable catalyst of an active metal or combination of active metals supported on aluminum oxide, which is predominantly alpha-aluminum oxide, is provided. The active metal or metals is optionally one or a mixture of ruthenium, copper, gold, an alkaline earth metal, an alkali metal, palladium, platinum, osmium, iridium, silver, and rhenium. The process is applicable to the oxidation of hydrogen chloride to chlorine in a Deacon process.

Abstract: Catalyst compositions for the treatment of vehicular exhaust gases are based on zirconium and cerium oxides, have a cerium oxide content of at most 50% by weight, a level of reducibility of at least 95% after calcination in air at 600°, and a specific surface area after calcination for 4 hours at 1100° of at least 15 m2/g; such compositions are prepared by forming an aqueous mixture containing zirconium and cerium compounds, by heating this mixture to at least 100° and, after the heating, adjusting it to a basic pH, by adding a surfactant additive to the precipitate obtained from this mixture and by calcinating the precipitate in an inert gas or under vacuum at a temperature of at least 900° and then in an oxidizing atmosphere at a temperature of at least 600°.

Abstract: The invention relates to a multilayer catalyst for the partial oxidation of hydrocarbons in gaseous phase, comprising a monolithic ceramic or metallic substrate having a solid macroporous structure consisting of one or more structures, on which a first active layer with a crystal-line perovskitic structure is deposited, having general formula AxA? 1-xByB? 1-YO3±? wherein: A is a cation of at least one of the rare earth elements, A? is a cation of at least one element selected from groups Ia, IIa and VIa of the periodic table of elements, B is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb, or VIII of the periodic table of elements, B? is a cation of at least one element selected from groups IVb, Vb, VIb, VIIb or VIII of the periodic table of elements Mg2+ or Al3+, x is a number which is such that 0?x?1, y is a number which is such that 0?y?1, and ? is a number which is such that 0???0, 5, a second more external active layer consisting of a dispersion of a noble metal and a possible s

Abstract: In Suzuki Cross-Couplings, a palladium-containing perovskite-type composite oxide represented by the following general formula (1) is used as a catalyst for synthesis reaction: Ln2MyCu1-x-yPdxO4±???(1) wherein Ln represents elements composed of at least one essential element selected from La, Pr, Nd, Sm, Eu, and Gd and at least one optional element selected from Y, Ce, Yb, Ca, Sr, and Ba; M represents at least one element selected from Cr, Mn, Fe, Co, Ni, and Al; x, indicating an atomic proportion, is 0.001?x?0.4; y, indicating an atomic proportion, is 0?y?0.5; and ? indicates an oxygen excess amount or an oxygen deficiency amount.

Abstract: The present invention relates to a fabrication method of a solid oxide fuel cell. The fabrication method of a fuel electrode and electrolyte of a solid oxide fuel cell (SOFC) in which a sheet cell including a fuel electrode sheet and an electrolyte sheet is positioned at an upper side of a surface of a fuel electrode pellet, comprising steps of (a) molding and heat-treating powder, in which a fuel electrode material is mixed with a pore forming agent, so as to prepare a fuel electrode pellet; (b) stacking the fuel electrode sheet containing the fuel electrode material and the electrolyte sheet containing an electrolyte material so as to prepare the sheet cell; and (c) coating an adhesive slurry containing the fuel electrode material on the sheet cell or the pellet and adhering the fuel electrode sheet of the sheet cell and the pellet and then heat-treating it.

Abstract: A catalyst for treating an exhaust gas has at least a carrier and plural layers formed on the carrier, wherein at least one layer of the above plural layers has an interstice in the layer, and at least one layer of the above plural layers contains a catalyst component. The above catalyst for treating an exhaust gas allows the enhancement of the diffusion of an exhaust gas in a catalyst layer, which results in the improvement of catalyst efficiency.

Abstract: Low temperature activity of a vanadium-free selective catalytic reduction catalyst is provided by a mixed metal oxide support containing oxides of titanium and zirconium, the support having a promoter deposited on the surface of the mixed metal oxide support, and further having an active catalyst component deposited over the promoter on the mixed metal oxide support surface. Suitable promoters include oxides of silicon, boron, aluminum, cerium, iron, chromium, cobalt, nickel, copper, tin, silver, niobium, lanthanum, titanium, and combinations thereof. Suitable active catalyst components include oxides of manganese, iron and cerium.

Abstract: A process for preparing supported catalyst in pellet or coated monolith form is disclosed the method includes the steps of: forming a mixed metal carbonate complex having at least two metals by subjecting a first metal carbonate containing compound to ion exchange with desired metal cations; heat treating the resulting mixed metal carbonate complex to form a mixed oxide which consists of active metal oxides supported on a catalyst support; forming the resulting supported catalysts into pellets or coating the resulting supported catalyst onto a monolithic support. The catalysts may be used for treating effluents containing organic material in the presence of an oxidising agent.

Abstract: A method is disclosed of producing stable nanosized colloidal suspensions of particles with limited crystallinity loss, products thereof, use of the products and an apparatus for the method. In particular the present invention relates to a wet milling method with small beads wherein the size of the final particles in suspension are stabilized in the nanorange (D50<75 nm) and at the same time the particles substantially maintain the crystallinity.

Abstract: To provide a process for producing ceria-zirconia solid solution crystal fine particles having high crystallinity, being excellent in uniformity of composition and particle size, having a small particle size and a high specific surface area and being excellent in heat resistance, and such solid solution crystal fine particles. A process comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 5 to 50% of (ZrO2+CeO2), from 10 to 60% of RO (wherein R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba) and from 25 to 70% of B2O3, a step of quenching the melt to obtain an amorphous material, a step of heating the amorphous material at a temperature of from 550 to 1000° C.

Abstract: A catalyst for oxidative dehydrogenation of organic compounds is provided by forming a solution of catalyst precursor components comprised of Fe+3 and Zn+2 cations and at least one other modifier element cation in water to form an aqueous solution of the catalyst precursor components. The modifier element cation has a standard reduction potential of from greater than about ?2.87 E° (V) to less than about ?0.036 E° (V) with a valence of +2. A base is separately and simultaneously added to the aqueous solution in amounts to maintain the pH of the aqueous solution at a pH of from about 8.5 to about 9.5 as the catalyst precursor components. The catalyst precursor components are allowed to react and precipitate out of solution as a precipitate. The resulting precipitate is calcined to form a modified zinc ferrite catalyst compound.

Abstract: Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pt and/or Pd on the substrate; and (b) a second layer comprising Pt on the first layer; these layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals ranges from 0.18 to 2.5 g/in3 calculated as the respective alkali metal oxides M2O and alkaline earth metal oxides MO. Also described is a method for the production of a catalyst, as well as a process for the treatment of a gas stream comprising nitrogen oxide, in particular of an exhaust gas stream resulting from an internal combustion engine.

Abstract: Described is a catalyst comprising a substrate and a catalyst coating of two or more layers: (a) a first layer comprising Pd and Rh on the substrate; and (b) a second layer comprising Pt and/or Pd on the first layer; these layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals ranges from 0.18 to 2.0 g/in3 calculated as the respective alkali metal oxides M2O and alkaline earth metal oxides MO. Also described is a method for the production of a catalyst, as well as a process for the treatment of a gas stream, in particular of an exhaust gas stream resulting from an internal combustion engine.

Abstract: A pyrochlore-type oxide represented by a general formula A2B2O7-Z is prepared by precipitate formation, where A and B each represent a metal element, where Z represents a number of at least 0 and at most 1, where A contains at least one element selected from a group consisting of Pb, Sn, and Zn, and where B contains at least one element selected from a group consisting of Ru, W, Mo, Ir, Rh, Mn, Cr, and Re. Impurities are then sufficiently removed through washing and drying processes, and the pyrochlore-type oxide is calcined under controlled conditions. This allows the crystallinity of the pyrochlore-type oxide, which contained amorphous parts immediately after the production of the precipitate, to be increased so that the resistance to acid can be improved while preventing particle aggregation.

Abstract: An exhaust gas purifying catalyst (1) according to the present invention includes noble metal particles (6), a first compound (7) supporting the noble metal particles (6), and a second compound (9) disposed not in contact with the noble metal particles (6) and having an oxygen storage capacity. An average distance between the first compound (7) and the second compound (9) is between 5 nm and 300 nm.

Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.

Abstract: Nanowires useful as heterogeneous catalysts are provided. The nanowire catalysts are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane to ethylene. Related methods for use and manufacture of the same are also disclosed.

Abstract: The present invention relates to a method of preparing a heteropoly acid catalyst used for the production of methacrylic acid by gas phase oxidation of methacrolein, more precisely a method of preparing a heteropoly acid catalyst comprising the steps of preparing a slurry by adding metal precursors and ammonium salt to protonic acid Keggin-type heteropoly acid aqueous solution and stirring thereof; and drying, molding and firing the slurry to give a catalyst. The present invention provides a method of preparing a heteropoly acid catalyst exhibiting high methacrolein conversion rate and methacrylic acid selectivity without pre-firing process by using high purity protonic acid Keggin-type heteropoly acid and ammonium salt.

Abstract: The composition is based on zirconium oxide and at least one additive selected from zirconium oxide and at least one additive chosen from praseodymium, lanthanum or neodymium oxides, has a specific surface of at least 29 m 2/g after calcination at 1000° C. during a period of 10 hours and is obtained by a method wherein a mixture of zirconium compounds and additive is precipitated with a base; the medium thus obtained, containing a precipitate, is heated and a compound chosen from anionic surfactants, non-ionic surfactants, polyethylene glycols, carboxylic acids and the salts thereof and surfactants such as the ethoxylates of caroboxymethyl fatty alcohols is added to the compound and the precipitate is calcinated; the composition can be used as a catalyst.

Abstract: A method and system for the reduction of pollutant NOx gases from automobile exhaust, as well as a method of reforming hydrocarbons, using a self-sustaining catalyst comprising an ion conductive support, a dispersed cathodic phase, a dispersed anodic phase, and a dispersed sacrificial phase, and a method of forming the self-sustaining catalyst.

Abstract: A heterogeneous catalyst system, a method of preparing the catalyst system and a method of forming a biodiesel product via transesterification reactions using the catalyst system is disclosed. The catalyst system according to one aspect of the present disclosure represents a class of supported mixed metal oxides that include at least calcium oxide and another metal oxide deposited on a lanthanum oxide or cerium oxide support. Preferably, the catalysts include CaO—CeO2ZLa2O3 or CaO—La2O3/CeO2. Optionally, the catalyst may further include additional metal oxides, such as CaO—La2O3—GdOxZLa2O3.

Abstract: A composition comprising an admixture of at least platinum particles and metal nanoparticles of metal that, when in admixture with the platinum particles, beneficially alters the characteristics of the platinum, including metals selected from one or more of the metals in groups 3-16, lanthanides, combinations thereof, and/or alloys thereof. The composition could be used to form an ink that further comprises an ionically conductive material, such as a polymer, capable of ionic networking throughout the ink composition so as to create a substantially structurally coherent mass without significantly impacting the reactivity of a substantial number of the nanoparticles. In one application, the ink may be used to form a catalyst whereby the ink is applied to an electrically conductive backing material, such as carbon paper or fibers.

Abstract: A catalyst for purification of exhaust gas in which a noble metal is supported on a metal-oxide support wherein, in a oxidation atmosphere, the noble metal exists on the surface of the support in high oxidation state, and the noble metal binds with a cation of the support via an oxygen atom on the surface of the support to form a surface oxide layer and, in a reduction atmosphere, the noble metal exists on the surface of the support in a metal state, and an amount of noble metal exposed at the surface of the support, measured by CO chemisorption, is 10% or more in atomic ratio to a whole amount of the noble metal supported on the support.

Abstract: A purifying catalyst includes catalyst powder composed of a transition metal oxide of which an average particle diameter is within 1 nm to 2 ?m and in which an electron binding energy of oxygen is shifted to an energy side lower than 531.3 eV. The purifying catalyst shows good purification performance even when noble metal is not contained as an essential component.

Abstract: The present invention relates to a catalyst for producing gaseous hydrogen current or hydrogen-rich currents through hydrocarbon reforming with water vapor. Said catalyst comprises at least one support, an active phase and at least two promoting agents, and is characterized in that it is a metal-type-supported solid in which the active phase comprises at least one transition metal chosen from group VIII, and at least one promoting agent chosen from the alkaline-earth or transition metals; and the support comprises at least one mixed oxide with a basic nature, and at least one promoting agent chosen from among the lanthanides group. The invention also has as an object the process for preparing the catalyst, as well as its use in the process for obtaining the hydrogen or hydrogen-rich gas from hydrocarbons, in different operating conditions and using various types of hydrocarbons.

Abstract: An exhaust gas treating catalyst further improved in denitrification performance is provided. It is an exhaust gas treating catalyst containing a complex oxide represented by the general formula ABO3, where the A-site is composed of a lanthanoid (La) and barium (Ba), and the B-site is composed of iron (Fe), niobium (Nb) and palladium (Pd).

Abstract: The invention provides a chlorine production catalyst that shows excellent reaction activity in the oxidation reaction of hydrogen chloride with oxygen into chlorine, is inexpensive and can be supplied stably, and is suited for use in a fluidized-bed reactor. The invention also provides a chlorine production process using the catalyst. The chlorine production catalyst of the invention includes spherical particles containing copper element (A), an alkali metal element (B) and a lanthanoid element (C) and having an average sphericity of not less than 0.80. The lanthanoid element (C) has a bond dissociation energy with oxygen at 298 K of 100 to 185 kcal/mol. The content of the copper element (A) in the catalyst is 0.3 wt % to 4.5 wt %.

Abstract: The present disclosure relates to a fluid purification device that has a deactivation resistant photocatalyst having nanocrystallites of less than 14 nanometers (nm) in diameter with at least 200 m2 surface area/cm3 of skeletal volume in cylindrical pores of 5 nm in diameter or larger, with the mode of the pore size distribution 10 nm or more.

Abstract: A method for whisker formation on the surface of aluminum-containing metallic alloy fibers and substrates provides a support structure for many technical, medical and pharmaceutical applications. The novel surface modification of metallic alloy fibers and other metallic substrates involves heating the fiber or substrate in air at temperatures ranging from approximately 800° C. to approximately 1000° C. for a period of time ranging from approximately 10 hours to approximately 100 hours to form whiskers. The use of a metal oxide coating with large ions, such as zirconium oxide, allows the formation of alumina whiskers while preserving the structural integrity of the metallic alloy substrate. Uses of the present invention include, but are not limited to an advanced catalyst support, a highly efficient filter medium, a support for implants and the like.

Abstract: Method for producing a hydrogen storage material that includes a metal hydride and a non-hydrogenated material and that is doped with a metal as a catalyst, includes; mixing a catalyst precursor, which includes the metal, with the non-hydrogenated material so as to provide a first mixture; agitating the first mixture; thermally treating the first mixture so as to form a composite of the non-hydrogenated material and the metal; mixing the composite with the metal hydride so as to provide a second mixture; and grinding the second mixture so as to provide the hydrogen storage material.

Abstract: A quaternary oxide foam, comprises an open-cell foam containing (a) a dopant metal, (b) a dopant nonmetal, (c) titanium, and (d) oxygen. The foam has the advantages of a high surface area and a low back pressure during dynamic flow applications. The inactivation of Escherichia coli (E. coli) was demonstrated in a simple photoreactor.

Abstract: A catalyst 1 has a heat-resistant support 2 selected from among Al2O3, SiO2, ZrO2, and TiO2, and a first metal 4 supported on an outer surface of the support 2, and included by an inclusion material 3 containing a component of the support 2.

Abstract: A nanocomposite particle, its use as a catalyst, and a method of making it are disclosed. The nanocomposite particle comprises titanium dioxide nanoparticles, metal oxide nanoparticles, and a surface stabilizer. The metal oxide nanoparticles are formed hydrothermally in the presence of the titanium dioxide nanoparticles. The nanocomposite particle is an effective catalyst support, particularly for DeNOx catalyst applications.

Abstract: A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R and oxygen and satisfies 0<x?0.4 and 0<y<1.0 when the molar ratio of Ce, Bi and R of the oxide is represented as (1?x?y), x and Y respectively. The composite oxide has an X-ray diffraction peak corresponding to that of a fluorite structure. In the composite oxide, R contains one or two of Pr and Tb. The exhaust gas purification catalyst is favorable for a PM combustion catalyst.

Abstract: The present invention provides a method for preparing a pyrochlore type oxide having a larger specific surface area, a polymer electrolyte fuel cell and a fuel cell system improved in power generation efficiency and capable of being produced more inexpensively, and a method for producing an electro catalyst for a fuel cell, which electro catalyst has a larger specific surface area, is relatively inexpensive, and has high electrode activity per unit mass. A method for preparing a pyrochlore type oxide represented by A2B2O7-Z wherein A and B represent a metal element, Z represents a number of 0 or more and 1 or less, A includes at least one selected from the group consisting of Pb, Sn, and Zn, and B includes at least one selected from the group consisting of Ru, W, Mo, Ir, Rh, Mn, Cr, and Re, wherein the pyrochlore type oxide is produced by a reaction of a halide or nitrate of A with an alkali salt of a metal acid of B.

Abstract: A methanation catalyst, a carbon monoxide removing system, a fuel processor, and a fuel cell including the same, and more particularly a non-supported methanation catalyst including the catalytically active non-precious metal particles and the metal oxide particles, and a carbon monoxide removing system, a fuel processor, and a fuel cell including the same. The methanation catalyst has high selectivity for the methanation of carbon monoxide instead of the methanation of carbon dioxide and the reverse water gas shift reaction of carbon dioxide, which are side reactions of the methanation of carbon monoxide, maintains high concentration of generated hydrogen as small amounts of hydrogen and carbon dioxide are consumed, and effectively removes carbon monoxide at low operating temperatures of 200° C. or less.

Abstract: Disclosed is a catalytic material for purifying an exhaust gas component. The catalytic material comprises a composite oxide which contains, as essential components, zirconium (Zr) and neodymium (Nd), and further contains a rare-earth metal R other than cerium (Ce) and neodymium (Nd), wherein each of the zirconium, neodymium and rare-earth metal R constituting the composite oxide is contained, in the form of oxide, in such a manner that a ratio of Nd2O3/(ZrO2+Nd2O3+RO) is 3 mol % or more, and a ratio of (Nd2O3+RO)/(ZrO2+Nd2O3+RO) is 33 mol % or less. The catalytic material of the present invention can oxidize/burn PM in a short period of time, while suppressing CO emission during the burning of the PM, and can achieve further enhanced NOx conversion performance.

Abstract: The invention provides a catalyst for catalytically removing three components which are carbon monoxide, hydrocarbons and nitrogen oxides from combustion exhaust gas generated by combusting fuel in the neighborhood of the stoichiometric air to fuel ratio by bringing the combustion exhaust gas into contact therewith, the catalyst comprising: (A) a first catalyst component comprising at least one member selected from rhodium, platinum, and palladium in a content of 0.01 to 0.5% by weight; and (B) a second catalyst component, which is the remainder, comprising a composite oxide or a mixed oxide comprising (a) at least one oxide selected from zirconium oxide and titanium oxide, and (b) an oxide of at least one element selected from praseodymium, yttrium, neodymium, tungsten, niobium, silicon, and aluminum, wherein the content of the oxide (a) in the composite oxide or the mixed oxide is in a range of 70 to 95% by weight.

Abstract: A pliable refractory metal carrier (46) may have coated thereon an anchor layer (47) to improve adherence to the carrier (46) of a catalytic coating (48). The conformable catalyst member (26, 82, 82?, 126, 226, 326) may be bent to conform to a curved or bent exhaust pipe (20, 220, 320) within which it is mounted. The pliable metal carrier may be in the form of a tube such as carrier (46) having perforations (54) formed therein, or it may be a metal strip (76) which is folded into accordion pleats (80) and has perforations (78) formed therein. The perforations (54, 78) serve to permit the passage of exhaust gas therethrough. A series of interior closures (58) and annular baffles (60) may be provided to import a serpentine flow path to gases flowed through an exhaust pipe (22) containing a conformable catalyst member (226) therein. A mounting member (68) may be supplied to fasten one end of the conformable catalyst member (226) to the discharge end of an exhaust pipe (220).

Abstract: The present invention relates to processes for converting a mixed alcohol feedstock, including methanol and a higher alcohol, to olefins such as ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate-to-olefin reaction system can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.

Abstract: In a particulate filter, a catalyst layer containing Pt-carried activated alumina particles, CeZr-based mixed oxide particles and ZrNd-based mixed oxide particles is formed, the proportion of the total amount of the CeZr-based mixed oxide particles and the ZrNd-based mixed oxide particles in the total amount of the Pt-carried activated alumina particles, the CeZr-based mixed oxide particles and the ZrNd-based mixed oxide particles is 10% to 60% by mass, both inclusive, and the mass ratio of the CeZr-based mixed oxide particles to the ZrNd-based mixed oxide particles is 20/80 to 80/20, both inclusive. This configuration enhances the particulate burning property and the low-temperature exhaust gas conversion efficiency.

Abstract: The invention contemplates a method of making a catalytic material, and uses of the material. The catalytic material is made by depositing catalytic metals, such as gold or platinum, on substrate materials, such as lanthanum-doped ceria or other oxides. The catalytic metal, which comprises both crystalline and non-crystalline structures, is treated, for example with aqueous basic NaCN solution, to leach away at least some of the crystalline metallic component. The remaining noncrystalline metallic component associated with the substrate exhibits catalytic activity that is substantially similar to the catalyst as prepared. The use of the catalyst in an apparatus such as a reactor or analytic instrument is contemplated, as is the use of the catalyst in efficient, cost-effective reactions, such as removal of carbon monoxide from fuel gases, for example by performing the water gas shift reaction.

Abstract: The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO2:ZrO2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.

Abstract: A particulate inorganic mixed oxide comprising: aluminum; zirconium; cerium; lanthanum and an additional element selected from the group consisting of neodymium and praseodymium, wherein the inorganic mixed oxide has at least 80% of primary particles with article diameters of 100 nm or less, and at least a part of the primary particles have an enriched surface region where the additional element is locally increased in a surface layer portion thereof.