Fuel cell

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Halogen or compound containing same

Reexamination Certificate

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Details

C502S036000, C502S056000, C502S339000

Reexamination Certificate

active

08003561

ABSTRACT:
The invention aims at providing a platinum black material, without using an expensive and rare material, which is excellent in CO poisoning inhibiting effect, H2S poisoning inhibiting effect, SO4poisoning inhibiting effect and HCHO poisoning inhibiting effect, and a method for fluorinating platinum black. The platinum black material is characterized by fluorine adsorbed on its surface. The method for fluorinating platinum black is characterized by allowing platinum black to stand in a mixed gas atmosphere of n inert gas and fluorine in a low-pressure chamber to make fluorine adsorbed on the surface of the platinum black.

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patent: 3969267 (1976-07-01), McVicker
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patent: 1867391 (2007-12-01), None
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patent: 2002-151088 (2002-05-01), None
patent: 98/18717 (1998-05-01), None
Yoshida et al., “Tolerance to CO Poisoning on Fluorinated Pt Catalysts for the Anode of Polymer Electrolyte Fuel Cells,” Electrochemistry, vol. 73, No. 4, pp. 298-300 (Apr. 5, 2005).
Bechtold E: Adsorption of fluorine on Pt (111) Appliaction of Surface Science, vol. 7, 1981, pp. 231-240, XP008089597.
Bechtold E et al.: “Adsorption of fluorine on Pt (100)” Surface Science, col. 151, 1985, pp. 521-530, XP002473118.

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