Water electrolysis catalyst for fuel cell anode, anode catalyst composition, and membrane electrode assembly
A water electrolysis catalyst and fuel cell technology, applied in fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve the problems of fuel cell performance and reliability degradation, extreme oxidation and degradation of the anode catalyst layer, etc., and achieve high durability Effect
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[0070] Hereinafter, the present invention will be described based on examples. In addition, this invention is not limited to these Examples. In addition, "parts" and "%" in the examples represent "parts by mass" and "% by mass", respectively, unless otherwise specified.
[0071]
[0072] [Manufacture of Catalyst E-1]
[0073] In a 5L polytetrafluoroethylene beaker, add iridium chloride trivalent adjustment product (IrCl manufactured by Furuya Metal Co., Ltd.) containing 7.19 g of iridium. 3 ·nH 2 O), and a ruthenium chloride trivalent adjustment product containing 8.82 g of ruthenium (RuCl manufactured by Furuya Metal Co., Ltd. 3 ·nH 2 (0), add 2.0L deionized water and stir, while raising the temperature of the liquid to 80°C, and keep stirring at 80°C for 2 hours. Dissolve 1.4 times the amount of NaOH of the neutralization equivalent of the chloride ion of iridium chloride and ruthenium chloride in 9 times the amount of deionized water to make a 10% NaOH solution, and ...
Embodiment 2
[0077] [Manufacture of Catalyst E-2]
[0078] Use iridium chloride trivalent adjustment products containing 9.07g of iridium (IrCl manufactured by Furuya Metal Co., Ltd. 3 ·nH 2 O), and a ruthenium chloride trivalent adjustment product containing 7.16 g of ruthenium (RuCl manufactured by Furuya Metal Co., Ltd. 3 ·nH 2 O), except that, it is processed in the same manner as in Example 1 to obtain a composition of Ir 0.4 Ru 0.6 o 2 19.7 g of black powder (catalyst E-2).
[0079] [XRD measurement]
[0080] In powder X-ray diffraction, the crystallite diameter of the main diffraction peak at 2θ=27.99° is 4.4nm, and there is one maximum diffraction peak at 2θ=66.10° to 67.00°, and the diffraction angle is 66.45°.
[0081]
[0082] [Manufacture of Catalyst E-3]
[0083] Carbon black Vulcan XC-72R (manufactured by Cabot Corporation) was heat-treated at 2000°C for 4 hours in an induction heating vacuum furnace to obtain graphitized carbon (BET specific surface area of 100m ...
Embodiment 3
[0098] [Manufacture of anode catalyst sheet AS-1]
[0099]Weigh 0.13 g of the powder of the catalyst E-3 of Reference Example 1 and 3.25 mg of the powder of the catalyst E-1 of Example 1, add 1.0 g of ultrapure water, 0.48 g of 2-ethoxyethanol, and 0.32 g of 2-propanol g, and 0.87 g of 5% Nafion dispersion (manufactured by Dupont), stirred and mixed with a magnetic stirrer for 5 minutes, then stirred and mixed with an ultrasonic disperser for 1 hour, and finally stirred and mixed with a magnetic stirrer for 2 hours to obtain the anode catalyst paste . A polytetrafluoroethylene sheet with a thickness of 50 μm is closely attached to the glass surface of a wire bar coater with a doctor blade (PM-9050MC, manufactured by SMT), and the anode catalyst paste is added to the surface of the polytetrafluoroethylene sheet. On the top, the scraper is swept with a thickness of 0.230 mm and a sweep speed of 1.00 m / min to coat the anode catalyst paste. The wet sheet was dried in air for 15 ...
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