A metal-doped graphene and a growth method of the same are provided. The metal-doped graphene includes graphene and metal elements, wherein the metal elements accounts for 1-30 at % based on the total content of the metal-doped graphene. The growth method includes performing a PECVD by using a carbon precursor, a metal precursor, and a group VI precursor in order to grow the metal-doped graphene.

The present disclosure provides a catalyst product having particular three-dimensional plate-like shape and comprising catalyst nanoparticles and a method for manufacturing same. The present product may be useful in fuel cells or battery applications. In certain embodiments the present catalysts show good catalytic activity and durability even at low catalyst loads.

An example of a stable electrode structure is to use a gradient electrode that employs large platinum particle catalyst in the close proximity to the membrane supported on conventional carbon and small platinum particles in the section of the electrode closer to a GDL supported on a stabilized carbon. Some electrode parameters that contribute to electrode performance stability and reduced change in ECA are platinum-to-carbon ratio, size of platinum particles in various parts of the electrode, use of other stable catalysts instead of large particle size platinum (alloy, etc), depth of each gradient sublayer. Another example of a stable electrode structure is to use a mixture of platinum particle sizes on a carbon support, such as using platinum particles that may be 6 nanometers and 3 nanometers. A conductive support is typically one or more of the carbon blacks.

A method for making tungsten-alloy nanoparticles that are useful for fuel cell applications includes a step of combining a solvent system and a surfactant to form a first mixture. A tungsten precursor is introduced into the first mixture to form a tungsten precursor suspension. The tungsten precursor suspension is heated to form tungsten nanoparticles. The tungsten nanoparticles are combined with carbon particles to form carbon-nanoparticle composite particles. The carbon-nanoparticle composite particles are combined with a metal salt to form carbon-nanoparticle composite particles with adhered metal salt, the metal salt including a metal other than tungsten. The third solvent system is then removed. A two-stage heat treatment is applied to the carbon-nanoparticle composite particles with adhered metal salt to form carbon supported tungsten-alloy nanoparticles. A method for making carbon supported tungsten alloys by reducing a tungsten salt and a metal salt is also provided.

Disclosed are a method for preparing a graphene dot-palladium hybrid having a nanosponge structure that includes reducing a palladium precursor in the presence of a carbon dot and sodium bromide, and a graphene dot-palladium hybrid catalyst prepared according to the method. The nanosponge structure of the graphene dot-palladium hybrid is encapsulated by a graphene dot. The carbon dot is doped with at least one heteroatom selected from the group consisting of nitrogen, sulfur, phosphorus, and boron.

The present specification relates to a carrier-nanoparticle complex, a catalyst including the same, an electrochemical cell or a fuel cell including the catalyst, and a method for preparing the same.

A fuel cell component including a fuel cell substrate and a nitride material. The material may be a nitride compound having a chemical formula A.sub.xB.sub.yN.sub.z, where A is a metal, B is a metal different than A, N is nitrogen, x>0, y<7 and 0<z<12. The nitride compound may have a ratio of a stoichiometric factor to a reactivity factor of greater than 1.0. The stoichiometric factor indicates the reactivity of a nitride compound with chemical species as compared to a baseline nitride compound. The reactivity factor indicates the reaction enthalpy of the nitride compound and the chemical species as compared to a baseline nitride compound and the chemical species. The nitride compound may be Fe.sub.3Mo.sub.3N, Ni.sub.2Mo.sub.3N, Ni.sub.2W.sub.3N, CuNi.sub.3N, Fe.sub.3WN, Zn.sub.3Nb.sub.3N, V.sub.3Zn.sub.2N or a combination thereof. The nitride compound may be Si.sub.6Y.sub.3N.sub.11, Ni.sub.2Mo.sub.4N, Fe.sub.3Mo.sub.5N.sub.6 or a combination thereof.

Disclosed is a catalyst, a method for producing the catalyst, an electrode comprising the catalyst, a membrane-electrode assembly comprising the electrode, and a fuel cell comprising the membrane-electrode assembly, the catalyst being highly efficient and having a long service life due to improved interfacial properties with ionomer from having fluoride (F) groups on the surface thereof. The catalyst according to the present invention comprises: a support; metal particles supported in the support; and fluoride (F) groups on the surface of the support and metal particles.

The present invention provides a proton exchange membrane comprising an ion-conducting layer which comprises an ion-conducting polymer and a supported recombination catalyst, wherein the recombination catalyst is supported on graphene.

Disclosed are a catalyst, a method for producing the catalyst, an electrode comprising the catalyst, a membrane-electrode assembly comprising the electrode, and a fuel cell comprising the membrane-electrode assembly, the catalyst having superb catalytic activity that can be obtained by means of a simple post-treatment process of the raw catalyst. The catalyst according to the present invention comprises a support, and metal particles supported therein, wherein the metal particles comprise main particles and an additional metal layer thereon, and the main particles and additional metal layer comprise the same metal elements. The metal particles have a budding structure or a rod structure by having just a particular latticed active surface of the main particles grow to form the additional metal layer, or a core-shell structure by having the entire latticed active surface of the main particles grow to form the additional metal layer.