Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Reexamination Certificate
2003-06-03
2008-10-07
Wood, Elizabeth D (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
C502S101000, C502S180000, C502S182000
Reexamination Certificate
active
07432221
ABSTRACT:
Disclosed is an electrocatalyst for fuel cells, in which a porous carbon material including pores having a diameter smaller than a kinetic diameter of carbon monoxide is used as a support body and contact probability between an activated metal and carbon monoxide is decreased, thereby preventing fuel cell performance from being degraded by carbon monoxide. The electrocatalyst is obtained by adsorbing 10-80 parts by weight of an activated metal to 20-90 parts by weight of a porous support body, characterized in that the porous support body has a total surface area of 200-2,500 m2/g including an outer surface thereof and an inner surface of pores thereof, and has a plurality of pores penetrating into an interior of the support body with an average diameter of 2-15 nm and a total volume of 0.4-2.0 m3/g, and the activated metal is alloyed with 20-95 at % of platinum and 5-80 at % of one metal selected from among Ru, Sn, Os, Rh, Ir, Pd, V, Cr, Co, Ni, Fe and Mn. As for such an electrocatalyst, carbon monoxide does not fundamentally come in contact with the activated metal adsorbed to the inner surface of the pores of the support body, thereby minimizing degradation of fuel cell performance, thus overcoming fuel-feeding problems.
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http://www.etek-inc.com/faq.html.
T. Ioroi, N. Fujiwara, Z. Siroma, K. Yasuda, Y. Miyazaki; “Platinum and Molybdenum Oxide Deposited Carbon Electrocatalyst for Oxidation of Hydrogen Containing Carbon Monoxide”; Electrochemistry Communications 4 (2002), pp. 442-446.
Z. Qi, C. He, A. Kaufman; “Effect of CO in the Anode Fuel on the Performance of PEM Fuel Cell Cathode”; Journal of Power Sources, 4880 (2002), pp. 1-9.
Kim Chang-Soo
Kim Young-Gi
Lee Wong-Yong
Park Gu-Gon
Yang Tae-Hyun
DeLio & Peterson LLC
Korea Institute of Energy Research
Peterson Peter W.
Wood Elizabeth D
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