An electrode catalyst which is for a hydrogen fuel cell anode and in which Pt particles and WO.sub.3 particles are carried on carbon carriers, wherein the WO.sub.3 particles have a monocline system crystalline structure.

A catalyst layer for a fuel cell, wherein the catalyst layer comprises a catalyst-supporting carbon and an ionomer; wherein, in a particle size distribution obtained by the laser diffraction/scattering method, the catalyst-supporting carbon has at least two aggregate particle size peaks at less than 1 ?m and at 1 ?m or more; wherein, when a thickness of the catalyst layer is divided into three equal parts, the catalyst layer has a first region on a gas diffusion layer side, a second region in a middle part, and a third region on an electrolyte membrane side; and wherein a void ratio V.sub.G of the first region is 5% or more higher than a void ratio V.sub.M of the third region.

The present invention relates to an electrode for a fuel cell, comprising a non-platinum catalyst and a graphene layered structure, and a membrane-electrode assembly comprising the same and, more specifically, to a membrane-electrode assembly for a fuel cell and a fuel cell comprising the same, which implement excellent electrode efficiency through relatively inexpensive transition metals while not using platinum, by stacking alternately with a graphene layer, a catalyst layer comprising both a non-platinum catalyst complex including a carbon support, nitrogen, and non-platinum transition metal, and a conductive polymer.

Provided are a catalyst for a fuel cell, a method of manufacturing the same, and a fuel cell including the same. The method of preparing the catalyst for a fuel cell does not use a chemical reducing agent and therefore does not require a separate post-treatment process. In addition, through heat treatment, the structural stability of the catalyst and the active point of the oxygen reduction reaction are improved, and long-term stability can be achieved.

An ink and electrodes fabricated with the ink. The ink includes a dispersion of fibers in at least one solvent. Said fibers have one or more fiber types, where at least one type of said fibers comprises at least one catalyst for an electrochemical reaction and at least one binder polymer.

A nanowire catalyst for a fuel cell has a porous structure in which first and second pores having predetermined pore sizes are uniformly dispersed inside and on the surface thereof at a predetermined volume ratio. This enables the efficient exposure of active sites and efficient mass transfer, thereby improving fuel cell performance.

Disclosed is a process for the manufacture of a catalyst-coated membrane-seal assembly, including: (i) providing a carrier material; (ii-i) forming a first layer, the first layer being formed by: (a) depositing a first catalyst component onto the carrier material such that the first catalyst component is deposited in discrete regions; (b) drying the first layer; (ii-ii) forming a second layer, the second layer being formed by: (a) depositing a first seal component, such that the first seal component provides a picture frame pattern having a continuous region and void regions, the continuous region including second seal component and the void regions being free from second seal component; (b) depositing a first ionomer component onto the first layer, such that the first ionomer component is deposited in discrete regions; and (c) drying the second layer.

A P/Metal-NC hybrid catalyst that includes at least one nitrogen-doped carbonaceous matrix onto which at least one non-precious transition metal is covalently bonded and that includes at least one partially oxidised precious transition metal P of which the weight percentage is less than or equal to 4.0%, and preferably less than or equal to 2.0%, relative to the mass of the P/Metal-NC hybrid catalyst. Further, an electrochemical device that includes such a device, for example a fuel cell with a polymer electrolyte membrane.

Disclosed is a nanotubular intermetallic compound catalyst for a positive electrode of a lithium air battery and a method of preparing the same. In particular, a porous nanotubular intermetallic compound is simply prepared using electrospinning in which a dual nozzle is used, and, by using the same as a catalyst, a lithium air battery having enhanced discharge capacity, charge/discharge efficiency and lifespan is provided.

Provided is a solid electrolyte laminate comprising a solid electrolyte layer having proton conductivity and a cathode electrode layer laminated on one side of the solid electrolyte layer and made of lanthanum strontium cobalt oxide (LSC). Also provided is a method for manufacturing the solid electrolyte. This solid electrolyte laminate can further comprise an anode electrode layer made of nickel-yttrium doped barium zirconate (NiBZY). This solid electrolyte laminate is suitable for a fuel cell operating in an intermediate temperature range less than or equal to 600 C.