Disclosed are a catalyst complex which may suppress cell voltage reversal in a fuel cell and a method for manufacturing the same. The catalyst complex includes a support, a first catalytic active material supported on the support and comprising a platinum component including one or more selected from the group consisting of platinum and a platinum alloy, and a second catalytic active material supported on the support and comprising one or more selected from a noble metal other than platinum and an oxide thereof, and the support includes functional groups including oxygen.

Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.

Catalysts that include a carbon support and a metal, as well as methods of making such catalysts, electrodes including such catalysts, and fuel cells employing such electrodes are provided. The carbon support includes a high surface area porous carbon, a low surface area graphitized carbon, and a low surface area nonporous carbon. The metal includes platinum and/or one or more platinum alloys, where the metal is deposited onto the carbon support. The catalyst can be used in a catalyst ink and can form an electrode along with an ionomer for use in a fuel cell.

The present disclosure relates to a method of manufacturing an electrolyte membrane for fuel cells capable of effectively removing hydrogen and/or air crossing over. Specifically, the method includes coating a slurry including at least an ionomer on a substrate to manufacture an ion transfer layer, manufacturing a laminate including the substrate and the ion transfer layer, and providing a pair of laminates to form an electrolyte membrane, wherein the ion transfer layer has a catalyst region formed at one side thereof based on a width-direction center line thereof, the catalyst region including a catalyst.

A polyelemental catalyst structure. The structure includes a region formed of a first metal material, a first core region formed of a second metal material, and a second core region formed of a third metal material. The first core region has interfacial contact with the region. The second core region has interfacial contact with the first core region. The polyelemental catalyst structure includes platinum (Pt), a first metal M.sub.I, a second metal M.sub.II and a third metal M.sub.III. The first metal M.sub.I is configured to enhance catalytic activity of Pt. The second metal M.sub.II is configured to enhance stability of the polyelemental catalyst structure. The third metal M.sub.III is configured to enhance covalent bonding between Pt, the first metal M.sub.I, the second metal M.sub.II and/or the third metal M.sub.III.

Provided are a fuel cell and a fuel cell system capable of suppressing deterioration of the electrolyte membrane by iron-based foreign substances with a simple structure. The fuel cell includes: a MEGA and a nitrate compound, wherein the MEGA has an electrolyte membrane, an anode catalyst layer disposed on one surface of the electrolyte membrane, a cathode catalyst layer disposed on the other surface of the electrolyte membrane, an anode gas diffusion layer disposed on a surface of the anode catalyst layer which is opposite to a surface of the anode catalyst layer on the electrolyte membrane side, and a cathode gas diffusion layer disposed on a surface of the cathode catalyst layer which is opposite to a surface of the cathode catalyst layer on the electrolyte membrane side, and wherein the nitrate compound is disposed in the MEGA.

The present disclosure relates to a fuel cell catalyst and a manufacturing method thereof. The fuel cell catalyst can be used to manufacture a membrane electrode assembly having a catalyst layer of high density and high dispersion by solving the problem of aggregation of catalyst particles occurring during the formation of the catalyst layer, by using a catalyst including a polydopamine-coated support. In addition, the method for manufacturing the fuel cell catalyst does not require a solvent because the catalyst including the polydopamine-coated support, wherein from 0.1 to 1% of the hydroxy groups contained in catechol groups of the polydopamine are replaced by halide atoms, in solid phase are simply heat-treated by solid-to-solid dry synthesis which allows manufacturing of a fuel cell catalyst in a short time by eliminating the need for a washing process using a solvent and an extraction process for sampling after the synthesis.

A method for depositing a ruthenium-containing film on a substrate by a cyclical deposition process is disclosed. The method may include: contacting the substrate with a first vapor phase reactant comprising a metalorganic precursor, the metalorganic precursor comprising a metal selected from the group consisting of platinum, aluminum, titanium, bismuth, zinc, and combination thereof. The method may also include; contacting the substrate with a second vapor phase reactant comprising ruthenium tetroxide, wherein the ruthenium-containing film comprises at least one of a ruthenium-platinum alloy, or a ternary ruthenium oxide. Device structures including a ruthenium-containing film deposited by the methods of the disclosure are also disclosed.

The present invention concerns a double passivation galvanic displacement (GD) synthesis method for production of high performance, supported noble metal-M alloy composite material, where M is an electrochemically less noble metal, compared to the noble metal, the supported noble metal-M alloy composite material obtained by the synthesis, and the use of such composite material as electrocatalyst material.

A protonated dimeric ionic liquid that enhances and improves the performance of a fuel cell catalyst. The protonated dimeric ionic liquid comprises 9′9′-(butane-1,4-diyl)bis(3,4,6,7,8,9-hexahydro-2H-pyrimido[1,2-a]pyrimidin-1-ium) 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate. Membrane electrode assemblies (MEAs) and polymer electrolyte membrane fuel cells (PEMFCs) employing the protonated dimeric ionic liquid are also disclosed.