This invention provides a preparation method of a catalyst for preferential oxidization of CO in a hydrogen-enriched atmosphere, and a catalyst product obtained from the method and its applications thereof. Particularly, in this invention, a wide-temperature catalyst for preferential oxidization of CO in a hydrogen-enriched atmosphere is obtained by depositing one or more of an iron oxide, cobalt oxide, and nickel oxide as a promoter onto the surface of a supported Pt-group noble metal catalyst precursor via chemical vapor deposition or atomic layer deposition. In the wide-temperature catalyst, the active noble metal component has a content of 0.1 to 10 wt %, and the promoter has a content of 0.1 to 10 wt % in terms of the metal element thereof. In the reaction of preferential oxidation of CO in a hydrogen-enriched atmosphere, the catalyst prepared by this invention can exhibit excellent catalytic performance and can achieve high conversion of CO with high selectivity in a wide temperature range of −80 to 200° C., for example. Also, the catalyst can remain stable for a long time even in a case where steam and CO.sub.2 are present in the hydrogen-enriched atmosphere.

A catalyst for wastewater treatment is disclosed. The catalyst includes a porous carrier, iron oxide impregnated into the pores of the porous carrier, and platinum impregnated into the pores and mixed with the iron oxide in the pores. Also disclosed are a method for preparing the catalyst and a method for wastewater treatment using the catalyst.

Electrocatalysts and methods of forming the same are provided. A hybrid electrocatalyst can be a combination of a platinum (Pt)-based catalyst and a carbon-based non-precious-metal catalyst using a single atom approach. A fuel cell electrocatalyst can include a nitrogen-doped carbon support and a plurality of atoms of both Pt and of a non-precious-metal catalyst dispersed in the support. The dispersed atoms can be isolated from each other within the support.

A three-way catalyst article, and its use in an exhaust system for compressed natural gas engines, is disclosed. The catalyst article for treating exhaust gas from compressed natural gas (CNG) engine comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the first catalytic region comprises a first zeolite; and a second catalytic region beginning at the inlet end, wherein the second catalytic region comprises a second platinum group metal (PGM) component, a second oxygen storage capacity (OSC) material, and a second inorganic oxide; wherein the second PGM component is selected from the group consisting of palladium, platinum, rhodium or a combination thereof.

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.

A hydrocarbon production system capable of efficiently producing hydrocarbon containing a high-calorie gas by securing hydrogen and carbon monoxide required for hydrocarbon synthesis using water and carbon dioxide as raw materials is obtained. The hydrocarbon production system includes an electrolytic reaction unit that converts water and carbon dioxide into hydrogen and carbon monoxide through an electrolytic reaction, a catalytic reaction unit that converts a product generated by the electrolytic reaction unit into hydrocarbon through a catalytic reaction, and branch paths and that branch a portion of an outlet component of the catalytic reaction unit.

The present invention is directed to multifunctional nanomaterials for photothermal heating and catalytic applications. The present invention discloses a method of photothermally heating a solution. The present method also discloses a method of catalyzing a reaction. Both methods require a step of exposing a solution to at least one wavelength of the electromagnetic spectrum. A gold-iron oxide nanomaterial comprising an iron oxide substrate and discrete gold particles deposited on the substrate is also disclosed.

In one embodiment, the present application discloses a catalyst composition comprising: a) a reaction solvent or a reaction medium; b) organometallic nanoparticles comprising: i) a nanoparticle (NP) catalyst, prepared by a reduction of an iron salt in an organic solvent, wherein the catalyst comprises at least one other metal selected from the group consisting of Pd, Pt, Au, Ni, Co, Cu, Mn, Rh, Ir, Ru and Os or mixtures thereof; c) a ligand; and d) a surfactant; wherein the metal or mixtures thereof is present in less than or equal to 50,000 ppm relative to the iron salt.

The present disclosure provides a method for preparing a molecular sieve catalyst. A water-in-oil micro-emulsion including a continuous phase containing an organic solvent and a dispersed phase containing an aqueous solution containing one or more metal salts and a water-soluble organic carbon source is prepared, hydrolyzed, and azeotropically distilled to form a mixture solution. The mixture solution is heated to carbonize the water-soluble organic carbon source to form nanoparticles each having a core-shell structure including a carbon-shelled metal-oxide. The nanoparticles containing the carbon-shelled metal-oxide are dispersed in a molecular sieve precursor solution. A nanoparticle-loaded molecular sieve is formed from the molecular sieve precursor solution containing the nanoparticles, and then calcined to remove carbon there-from to form a metal-oxide loaded molecular sieve.

Disclosed is a process for the preparation of 2,3,3,3-tetrafluoropropene, comprising the following two reaction steps: a. a compound having the formula CF.sub.3-xCl.sub.xCF.sub.2-yCl.sub.yCH.sub.2Cl undergoes gas-phase fluorination with hydrogen fluoride through n serially-connected reaction vessels in the presence of a compound catalyst producing 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane; in said formula, x=1, 2, 3, y=1, 2, and 3≦x+y≦5; b. the 2,3-dichloro-1,1,1,2-tetrafluoropropane, 1,2,3-trichloro-1,1,2-trifluoropropane, and 1,3-dichloro-1,1,2,2-tetrafluoropropane undergo gas-phase dehalogenation with hydrogen in the presence of a dehalogenation catalyst, producing 2,3,3,3-tetrafluoropropene and 3-chloro-2,3,3-trifluoropropene, then separation and refining are performed, producing 2,3,3,3-tetrafluoropropene. The present invention is primarily used to produce 2,3,3,3-tetrafluoropropene.