摘要:
An object of the present invention is to provide a platinum catalyst for a fuel cell, the platinum catalyst having platinum particles with a fine particle size which are supported on carbon carriers in a highly dispersed manner. To achieve the above object, the present invention provides a method for producing an electrode catalyst for a fuel cell, the method comprising: an ammonia treatment step of heat-treating carbon carriers in an ammonia gas atmosphere; a platinum salt contact step of mixing the carbon carriers treated with ammonia with a solution prepared by dissolving a platinum salt in a solvent and bringing the platinum salt coming into contact with the carbon carriers in the mixture that has been formed; a recovery step of recovering the carbon carriers by removing the solvent from the mixture; and a heat treatment step of heat-treating the recovered carbon carriers in an inert gas atmosphere.
摘要:
According to the present invention, the catalyst performance of a chelate catalyst comprising a complex of a macrocyclic compound such as a porphyrin derivative is improved. Also, the following method is provided: a method for preparing a fuel cell electrode catalyst comprising a nitrogen-containing metal complex in which a metallic element is coordinated with a macrocyclic organic compound, such method comprising the steps of: adding tin oxalate to the nitrogen-containing metal complex; and baking a mixture of the nitrogen-containing metal complex and tin oxalate in an inert gas atmosphere, wherein elution of metal tin is carried out via acid treatment.
摘要:
A platinum-free chelate catalyst material consisting of at least one unsupported transition metal, a nitrogen-containing organo-metallic transition complex, a further transition metal other than the unsupported transition metal and a chalcogenic compound.
摘要:
According to the present invention, the catalyst performance of a chelate catalyst comprising a complex of a macrocyclic compound such as a porphyrin derivative is improved. Also, the following method is provided: a method for preparing a fuel cell electrode catalyst comprising a nitrogen-containing metal complex in which a metallic element is coordinated with a macrocyclic organic compound, such method comprising the steps of: adding tin oxalate to the nitrogen-containing metal complex; and baking a mixture of the nitrogen-containing metal complex and tin oxalate in an inert gas atmosphere, wherein elution of metal tin is carried out via acid treatment.
摘要:
The present invention provides a method for producing an electrode catalyst for a fuel cell, comprising the steps of: mixing conductive particles loaded with catalyst metal fine particles with an organic compound; and heat treating the mixture formed in the mixing step under an inert gas atmosphere, so as to carbonize the organic compound. According to the present invention, the size increase of catalyst metal fine particles, which lowers catalytic activity, can be suppressed.
摘要:
A method for preparing a platinum-free chelate catalyst material as an intermediate product for selective electrocatalytic reduction of oxygen includes performing a low-temperature plasma treatment on a powdery form of the transition-metal chelate in a plasma reactor chamber having an inert plasma gas disposed therein. A plasma power, a plasma gas pressure, a plasma initialization and a treatment time of the low-temperature plasma treatment are selected so that molecules of the transition metal chelate are fragmented in the plasma and cross-link in a subsequent chemical reaction so as to form a carbon matrix and retain a basic chelate structure in a surrounding of the transition metal.