| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell power generation system in which a CO poisoning of a catalyst layer of a fuel electrode is controlled and a deterioration of a CO resistance property, caused during a process in which oxygen cross-leaking from an oxidant electrode through a polymer electrolyte membrane or oxygen supplied directly to the fuel electrode is chemically reacted with a large volume of CO adsorbed to the catalyst layer of the fuel electrode, is controlled. <P>SOLUTION: A shutting-down valve controlling unit 4 controls a first fuel gas shutting-down valve 2a and a second fuel gas shutting-down valve 2b to open and supplies purge gas from a purge gas supplying source 2h to a fuel electrode 1a through a fuel gas supplying tube 2d, when the fuel cell power generation system generates power, and a potential controlling unit 5 increase a potential of the fuel electrode 1a against the potential of an oxidant electrode 1b. At this time, the potential of the fuel electrode 1a is controlled so that it is raised more than the potential of the oxidant electrode 1b, preferably, up to 0.8V or higher. <P>COPYRIGHT: (C)2009,JPO&INPIT |
