The catalyst in this present application includes a support and an active component dispersed on/in the support; wherein the support is at least one selected from inorganic oxides and the support contains macropores and mesopores; and the active component includes an active element, and the active element contains an iron group element. As a high temperature stable catalyst for methane reforming with carbon dioxide, the catalyst can be used to produce syngas, realizing the emission reduction and recycling utilization of carbon dioxide. Under atmospheric pressure and at 800° C., the supported metal catalyst with hierarchical pores shows excellent catalytic performance. In addition to high activity and good selectivity, the catalyst has high stability, high resistance to sintering and carbon deposition.

A nitrogen oxide storage material comprising: Mg.sub.1−yAl.sub.2O.sub.4−y, wherein y is a number satisfying 0≤y≤0.2, a noble metal, an oxide of a metal other than the noble metal, and a barium compound, the noble metal, the oxide, and the barium compound being loaded on Mg.sub.1−yAl.sub.2O.sub.4−y. The metal oxide comprises at least one metal oxide selected from zirconium oxide, praseodymium oxide, niobium oxide, and iron oxide.

The present invention relates to a catalyst comprising a carrier substrate of the length L extending between substrate ends a and b and two washcoat zones A and B, wherein washcoat zone A comprises a zeolite having a smallest lower channel width of at least 0.4 nm and extends starting from substrate end a over a part of the length L, and washcoat zone B comprises the same components as washcoat A and palladium and extends from substrate end b over a part of the length L, wherein L=L.sub.A+L.sub.B, wherein L.sub.A is the length of washcoat zone A and L.sub.B is the length of substrate length B.

Disclosed is a dissimilar metal-supported catalyst for the production of aromatics by methane dehydroaromatization. In the dissimilar metal-supported catalyst, a noble metal such as gold (Au), silver (Ag), platinum (Pt), and/or rhodium (Rh) is introduced into a catalyst supported with iron (Fe) on a zeolite support to promote the dehydrogenation of methane and the formation of iron carbide (Fe.sub.3C) as an active species for dehydroaromatization, achieving a greatly improved yield of aromatics. Also disclosed is a method for producing aromatics using the dissimilar metal-supported catalyst.

A battery electrode, a composition for a catalyst layer of a battery electrode, and a battery having excellent characteristics at low cost. The battery electrode includes a catalyst layer containing a non-platinum catalyst and platinum particles not being carried on the non-platinum catalyst, wherein a content of the platinum particles per unit area of the battery electrode is 0.0010 mg/cm.sup.2 or more and 0.1200 mg/cm.sup.2 or less.

The invention discloses a method for in-situ exsolution modification of a surface of a metal material, which comprises steps of : (1) a substrate metal powder are fully mixed with a metal powder for modification to obtain a raw material powder; (2) the raw material powder obtained in step (1) are prepared into a metal material by a preparation method at a non-equilibrium condition; (3) a heat treatment on the metal material prepared in step (2) is performed so that the metal material reaches an equilibrium state; after cooling to room temperature, a doped phase is exsolved to the surface of the metal material to obtain a modified metal material.

A Fe.sub.43.4Pt.sub.52.3Cu.sub.4.3 heterogeneous phase structure polyhedron nanoparticle, a preparing method and an application as an efficient fuel cell oxygen reduction catalyst are provided. The Fe.sub.43.4Pt.sub.52.3Cu.sub.4.3 heterogeneous phase structure polyhedron nanoparticle, includes: three elements of Fe, Pt and Cu; wherein the Fe.sub.43.4Pt.sub.52.3Cu.sub.4.3 heterogeneous phase structure polyhedron nanoparticle has a heterogeneous phase structure in which face-centered cubic and face-centered tetragonal coexist; wherein the heterogeneous phase structure is a face-centered tetragonal phase shell and face-centered cubic core with a high crystal plane index; a surface of the polyhedron nanoparticle has 1 to 2 atomic layers of enriched with Pt; a diameter distribution of the nanoparticles is at a range of 4.5 to 14.5 nm, and an average size is 8.4 nm. In the invention, hexadecylamine, iron acetylacetonate, copper acetylacetonate, platinum acetylacetonate, and 1,2-hexadecanediol are uniformly mixed, and oleylamine and oleic acid are added, condensed refluxed at 320-330° C.

A catalyst for converting a synthesis gas, said catalyst comprising a first catalyst component and a second catalyst component, wherein the first catalyst component comprises, supported on a first porous oxidic substrate, Rh, Mn, an alkali metal M and Fe, and wherein the second catalyst component comprises, supported on a second porous oxidic support material, Cu and a transition metal other than Cu.

Redox catalysts are provided for “low-temperature” methane partial oxidation in absence of gaseous oxidants. Methods of converting the methane to syngas using the catalysts are also provided. In some aspects, the conversion takes place at temperatures of about 400° C. to about 950° C. The methods can be used to convert methane to syngas containing carbon monoxide and hydrogen gas. In some aspects, the methods are carried out in a fixed bed reactor with reverse flow.

Disclosed is a method of preparing an intermetallic catalyst that includes irradiating ultrasonic waves to a precursor admixture including a noble metal precursor, a transition metal precursor, and a carrier to form core-shell particles including a transition metal oxide coating layer; the annealing the core-shell particles to form intermetallic particles including a transition metal oxide coating layer; and the removing the transition metal oxide coating layer from the intermetallic particles.