A method of producing a catalyst including a platinum-transition metal alloy on carbon, more specifically, a method of producing a carbon supported platinum alloy catalyst with high activity and superior durability includes coating a carbon-supported catalyst with an organic polymer as a material for a carbon layer, heat-treating the catalyst under a hydrogen-deficient atmosphere to convert the organic polymer into the carbon layer to prevent growth of catalyst particles caused by heat treatment through the carbon layer, allowing, at the same time, a transition metal supported together with platinum to be diffused into platinum particles to form a catalyst having a core-shell structure including a platinum skin layer on a surface thereof, and removing the carbon layer by ozone treatment after the heat treatment to induce an electrochemical reaction on the surface of the catalyst.

The present invention provides a catalyst composition for producing hydrogen and preparation method and use thereof, wherein the catalyst composition comprises a catalytic component and a supporter having a pyrochlore structure. By using the catalyst composition of the present invention, carbon deposition can be reduced and the oxidative steam reforming of ethanol could be operated for a long period of time with high ethanol conversion rate and selectivity of hydrogen.

A catalyst for catalytic reactors of which the outer shape is a helix with n blades, where n is greater than or equal to 1, wherein the stack void fraction percentage is between 75% and 85% and the surface area/volume ratio is greater than 1000 square meters/square meters.

A catalyst is provided. The catalyst includes a carrier and a metal. The carrier is represented by a formula: M.sub.xAl.sub.(1-x)O.sub.(3-x)/2, where M is an alkaline earth metal, and x is between 0.09 and 0.24. The metal is loaded on the carrier. A method for manufacturing the catalyst is also provided.

A catalyst for exhaust gas purification is described which includes a substrate and a catalyst coating layer provided on the substrate. The catalyst coating layer includes first and second metal oxide particles. The first metal oxide particles have a catalyst metal supported thereon, and the second metal oxide particles do not have a catalyst metal supported thereon. The first and second metal oxide particles have a specific particle size. This is because, when the sizes of the particles supporting the catalyst metal remain relatively large but the sizes of the particles not supporting a catalyst metal are minimized, it is possible to decrease the thickness of the catalyst coating layer while maintaining durability and improving gas diffusibility of the coating layer. Therefore, a thickness of the catalyst coating is decreased without decreasing durability, and the catalyst can exhibit high exhaust gas purification performance even under high load conditions.

An oxidation catalyst for treating an exhaust gas from a compression ignition engine, which oxidation catalyst comprises: a substrate; a first washcoat region comprising palladium (Pd) and a first support material comprising cerium oxide; and a second washcoat region comprising platinum (Pt) and a second support material.

A method of operating a fuel cell having an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, includes feeding the anode with an impure hydrogen stream having low levels of carbon monoxide up to 5 ppm, and wherein the anode includes an anode catalyst layer including a carbon monoxide tolerant catalyst material, wherein the catalyst material includes: (i) a binary alloy of PtX, wherein X is a metal selected from the group consisting of rhodium and osmium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic % and the atomic percentage of X in the alloy is from 20 to 55 atomic %; and (ii) a support material on which the PtX alloy is dispersed; wherein the total loading of platinum group metals (PGM) in the anode catalyst layer is from 0.01 to 0.2 mgPGM/cm.sup.2.

A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow substrate having a first and a second face, and first and second pluralities of channels. The first plurality of channels is open at the first face and closed at the second face. The second plurality of channels is open at the second face and closed at the first face. The monolith filter comprises a porous substrate having a first zone extending from the first face towards the second face and a second zone extending from the second face towards the first face. Each of the zones are less that filter length. A first catalytic material is distributed throughout the first zone of the porous substrate, and a second catalytic material covers at least a portion of the surfaces in the second zone of the porous substrate and is not distributed throughout the porous substrate.

A poison-resistant catalytic converter includes a washcoat having a support material comprised of titania and/or silica and a plurality of platinum group metal particles disposed in the support material. The washcoat is disposed on a substrate having a plurality of cells that define respective apertures. The catalytic converter is resistant to poisoning from sulfur and phosphorous compounds while operating at low temperatures. Applications include spark ignited internal combustion engines in combined heat and power systems, vehicles, combustion turbines, boilers and other applications for utilities, industry and vehicle emissions control.

The problem of the present invention is to provide an exhaust gas purification catalyst which can exhibit sufficient purification performance under a high Ga condition while having a resistance to stress such as high-temperature and poisonous substances. The present invention relates to an exhaust gas purification catalyst comprising two or more catalyst coating layers on a substrate, wherein a lower catalyst coating layer that is present lower with respect to an uppermost catalyst coating layer has a structure where a large number of voids are included and high-aspect-ratio pores having an aspect ratio of 5 or more account for a certain proportion or more of the whole volume of voids, thereby to improve gas diffusivity in the lower catalyst coating layer.