Manufacturing processes of catalyst layer for fuel cell

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Making catalytic electrode – process only

Reexamination Certificate

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C502S183000, C502S184000, C502S185000, C502S325000, C502S328000, C502S329000, C502S330000, C502S331000, C502S337000, C502S338000, C502S339000, C429S047000, C429S047000, C429S047000, C429S047000, C429S047000

Reexamination Certificate

active

07151069

ABSTRACT:
The feature of the process for ultra-low alloy catalyst loading electrode according to this invention is to reduce its alloy formation period of aging process subsequent to hydrogen reduction process of catalyst ions after ion exchange process of proton for their ions in the cluster of the polymer electrolyte on the surface of the carbon powder. The process is able to drastically shorten the aging time with temperature rise beyond 200° C. up to 400° C. under hydrogen atmosphere for the formation of alloy catalyst, for example Pt—Ru binary by the additional processes of pre-treatment of substituting K+, Na+, Li+, Rb+, Cs+, Mg2+, Ca2+, Ba2+, Fe2+, Sr2+, Ra2+, Cu2+, Ag+, Zn2+, Ni2+, or Co2+for proton before the hydrogen reduction process. The further post-treatment of substituting K+, Na+, Li+, Rb+, Cs+, Mg2+, Ca2+, Ba2+, Fe2+, Sr2+, Ra2+, Cu2+, Ag+, Zn2+, Ni2+, or Co2+for proton before the ion exchange process is more preferable. This new process is little harmful to the CO tolerance performance of PEFC.

REFERENCES:
patent: 4328086 (1982-05-01), Takenaka et al.
patent: 4457823 (1984-07-01), LaConti et al.
patent: 5399184 (1995-03-01), Harada
patent: 6344291 (2002-02-01), Hitomi
patent: 6528201 (2003-03-01), Hitomi
patent: 6576363 (2003-06-01), Hitomi
patent: 6730427 (2004-05-01), Hitomi
patent: 6866960 (2005-03-01), Tsumura et al.
patent: 2002/0015878 (2002-02-01), Tsumura et al.
patent: 2003/0066763 (2003-04-01), Watanabe et al.
patent: 60-135434 (1985-07-01), None
“Development of Ultra-low Pt—Ru Binary Alloy Loading Gas Diffusion Electrode for PEFC” pp. 116-117 by Naohiro Tsumura, et al., presented at the 41stBattery Symposium in Japan, Nov. 20-22, 2000.
“CO Tolerance Performance of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Gas Diffusion Electrode for PEFC”, pp. 570-571, by Naohiro Tsumura, et al., presented at the 42ndBattery Symposium in Japan, Nov. 21-23, 2001.
“Development of New Synthesis Process of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Gas Diffusion Electrode for PEFC” pp. 180-181, by Yoshinobu Yasunaga, et al., presented at the 44thBattery Symposium in Japan, Nov. 4-6, 2003.
“Development of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Gas Diffusion Electrode for PEFC”, by Naohiro Tsumura, et al., GS News Technical Report, vol. 62 No. 1 Jun. 25, 2003, pp. 21-25.
“Development of New Manufacturing Process of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Electrode for PEFC”, by Yoshinobu Yasunaga, et al., GS News Technical Report, vol. 62 No. 2, Dec. 25, 2003, pp. 68-72.
Yoshinobu Yasunaga, Naohiro Tsumura, Shuji Hitomi, Hideo Yasuda, and Masanori Yamachi; Development of New Synthesis Process of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Gas Diffusion Electrode for PEFC; The 44thBattery Symposium in Japan, Nov. 4-6, 2003, Sakai, pp. 180-181.
Yoshinobu Yasunaga, Naohiro Tsumura, Shuji Hitomi, Hideo Yasuda, and Masanori Yamachi; Development of New Manufacturing Process of Ultra-Low Pt—Ru Binary Alloy Catalyst Loading Electrode for PEFC; GS News Technical Report, vol. 62, No. 2, Dec. 25, 2003, pp. 68-72.
Swee Chye Yeo and A. Eisenberg; Physical Properties and Supermolecular Structure of Perfluorinated Ion-Containing (Nafion) Polymers; Journal of Applied Science; vol. 21; pp. 875-898; (1977).

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