Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Making catalytic electrode – process only
Reexamination Certificate
2006-12-19
2006-12-19
Lorengo, J. A. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Making catalytic electrode, process only
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.
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Hitomi Shuji
Yasunaga Yoshinobu
Hailey Patricia L.
Japan Storage Battery Co., Ltd.
Lorengo J. A.
Sughrue & Mion, PLLC
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