A membrane electrode assembly can include an anode layer. The anode layer can include a first layer, and a second layer. The second layer can include a cerium oxide. A method of assembling a membrane electrode assembly can include provision of a membrane, a first layer, and a second layer. The second layer can include a cerium oxide. The first layer can be disposed on the second layer to form an anode layer. The anode layer can be disposed on an anode side of the membrane.

The invention relates to a method for producing a supported catalyst material for a fuel-cell electrode, as well as a catalyst material that can be produced using said method. In the method, first, a carbide-forming substance is deposited from the gas phase onto the carbon-based carrier material to produce a carbide-containing layer and, then, a catalytically-active precious metal or an alloy thereof from the gas phase is deposited to form a catalytic layer. By chemical reaction of the carbide-forming substance with the carbon, very stable carbide bonds are formed at the interface, while an alloy phase of the two forms at the interface between carbide-forming substance and precious metal. Overall, a very stable adhesion of the catalytic precious metal to the substrate results, whereby degradation effects are reduced, and the life of the material is extended.

A fuel cell membrane electrode assembly having: a proton exchange membrane, an anode catalyst coating on one side of the membrane, and a cathode catalyst coating on the other side of the membrane. The cathode catalyst coating has at least two carbon catalyst layers, with a low porosity layer adjacent to a high porosity layer. The high porosity layers have a volume fraction that is higher than the volume fraction of the low porosity layers.

Disclosed are a method of manufacturing an anode dual catalyst for a fuel cell so as to prevent a reverse voltage phenomenon and a dual catalyst manufactured by the same. The method may include supporting effectively metal catalyst particles and oxide particles on a conductive support, and thus, a dual catalyst manufactured using the method may be suitably used for controlling a reverse voltage phenomenon that occurs at the anode.

A cathode catalyst layer and an anode catalyst layer used for a membrane-electrode assembly in a polymer electrolyte fuel cell, wherein the cathode catalyst layer and the anode catalyst layer each include catalyst particles, a conductive carrier, a polymer electrolyte, and a fibrous material, the fibrous material includes at least one of an electron conductor and a proton conductor, and the fibrous material has a specific surface area in a range of 40 m.sup.2/g or more and 80 m.sup.2/g or less.

The present disclosure provides a preparation method of a catalyst slurry for a fuel cell membrane electrode assembly (MEA), including the following steps: preparing a slurry mixture with a catalyst, a dispersing solvent, an ionomer, a thickener, and a surfactant according to a certain mass ratio; subjecting the slurry mixture to pre-dispersion several times in an ultrasonic disperser and a high-shear emulsifying machine successively, to obtain a slurry pre-dispersion; and conducting dispersion on the slurry pre-dispersion in a high-pressure homogenizer to obtain the catalyst slurry. In the present disclosure, components of the catalyst slurry and a dispersion process are optimized and innovated, to construct a more effective three-phase interface. The MEA prepared according to the present disclosure has a significantly improved performance and reduced slurrying time; and is thus suitable for mass production.

A method of preparing a mesoporous carbon composite material having a mesoporous carbon phase and preformed metal nanoparticles located within the mesoporous carbon phase. The present invention also relates to a mesoporous carbon composite material and to a substrate having a film of such mesoporous carbon composite material.

Disclosed are a catalyst for an electrochemical cell and a method of manufacturing the catalyst. The catalyst includes a support, a first catalyst supported on the support, wherein the first catalyst is a catalyst for hydrogen oxidation reaction (HOR) or oxygen reduction reaction (ORR), a second catalyst supported on the first catalyst, wherein the second catalyst is a catalyst for oxygen evolution reaction (OER), and a protective layer formed on the first catalyst and the second catalyst.

A bifunctional catalyst and a preparation method therefor are provided. The bifunctional catalyst is prepared by providing carbon matrix, adding 0.01-10 mol/L platinum containing solution, 0.01-10 mol/L palladium containing solution, 0.01-10 mol/L silver containing solution, and 0.01-15 mol/L sodium citrate trihydrate solution to the carbon matrix for reacting at 20° C. to 80° C. for 0.5 h to 24 h to obtain a mixed solution, and adding reducing agent to the mixed solution for reacting for 0.5 h to 30 h, and centrifuging and drying so as to obtain the bifunctional catalyst.

A catalyst for a fuel cell anode comprises an alloy of Pd and at least two other transition metals, at least one of which which binds to hydrogen and/or carbon monoxide at least as strongly as Pd does. Suitable transition metals which bind more strongly are Co, W, Ti, V, Cr, Fe, Mo, Nb, Hf, Ta, Zr and Re. PdCoW is the most preferred alloy. The catalyst is used on the anode of a hydrogen oxidising fuel cell, such as a PEMFC to catalyse the hydrogen oxidation reaction.