Catalyst for solid polymer fuel cell and method for selecting catalyst for solid polymer fuel cell
A solid polymer and fuel cell technology, applied in the direction of solid electrolyte fuel cells, fuel cells, chemical instruments and methods, etc., can solve problems such as activity reduction
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Embodiment 1
[0092] Embodiment 1 (Pt catalyst) :
[0093] [Manufacture of Pt catalyst]
[0094] 996.42 mL of dinitrosodiammine platinum nitric acid solutions (Pt content: 50.00 g) and 3793 mL of pure water were put into the manufacturing container. Then, while the carbon fine powder (specific surface area 800m 2 / g, trade name: KB) 50.00 g was crushed and added. Then, 540 mL (10.8 volume %) of modified alcohol (95% ethanol + 5% methanol) was added and mixed as a reducing agent. The mixed solution was refluxed at about 95° C. for 6 hours to reduce Pt. Thereafter, filtration, drying (60° C. for 15 hours), and washing were performed.
[0095] [heat treatment]
[0096] The Pt catalyst is heat-treated. Regarding the heat treatment, the heat treatment temperature was set to 1050° C. for 2 hours in 100% hydrogen gas. Through this heat treatment, the Pt catalyst as Example 1 was obtained. The loading density of the platinum catalyst was 52%. The average particle diameter of the catalyst...
Embodiment 2
[0097] Embodiment 2 (Pt-Co alloy catalyst):
[0098] The Pt—Co alloy catalyst was produced by supporting Co on the Pt catalyst which was a precursor before heat treatment obtained in the production process of the Pt catalyst in Example 1, and performing alloying.
[0099] [Load of Co]
[0100] The Pt catalyst as a precursor was impregnated with cobalt chloride (CoCl 2 ·6H 2 O) 1.6 g was dissolved in a metal salt solution obtained by dissolving 100 mL of ion-exchanged water, and stirred with a magnetic stirrer. Then, 500 mL of a sodium borohydride (SBH) solution having a concentration of 1% by mass was added dropwise to the solution, stirred, and subjected to a reduction treatment to support Co on the Pt catalyst. Then, filter, wash, and dry.
[0101] [Alloying heat treatment]
[0102] Heat treatment for alloying is performed on the Co-loaded Pt catalyst. Regarding this heat treatment, the heat treatment temperature was set to 1000° C. in 100% hydrogen gas, and the heat...
Embodiment 3
[0106] Embodiment 3 (Pt-Co-Mn alloy catalyst) :
[0107] The Pt—Co—Mn alloy catalyst was produced by supporting Co and Mn on the Pt catalyst precursor of Example 1, alloying it, and treating it with a fluorine compound to form a water-repellent layer.
[0108] [Load of Co and Mn]
[0109] The precursor Pt catalyst was impregnated with cobalt chloride (CoCl 2 -6H 2 O) 1.6g and manganese chloride (MnCl 2 4H 2 O) 0.8 g of both were dissolved in a metal salt solution obtained by dissolving 100 mL of ion-exchanged water, and stirred with a magnetic stirrer. Then, 500 mL of a sodium borohydride (SBH) solution having a concentration of 1% by mass was added dropwise to the solution, stirred, and subjected to a reduction treatment to support Co and Mn on the Pt catalyst. Then, filter, wash, and dry.
[0110] For the Pt catalyst loaded with Co and Mn, alloying heat treatment was performed under the same conditions as in Example 2. Furthermore, the oxidative solution treatment w...
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