| 简介 |
PROBLEM TO BE SOLVED : To improve the initial performance and durability of the catalyst in a PEFC fuel cell system equipped with a hydrogen production apparatus by optimizing the amount of an Ni ingredient and that of rare earth elements carried by an inorganic oxide support.
SOLUTION : The catalyst contains Ni element and at least one rare earth ingredient, carried in an inorganic oxide support. The Ni to rare earth atomic mole ratio is 0.05-0.3, and the ratio of the mole of rare earth atoms to that of molecules in the oxide support is 0.015-0.07. Preferably, the content of the Ni ingredient is 5-50 wt.%, based on the content of the metal oxide, and that of rare earth ingredients is 1-25 wt.%, based on the metal oxides. The catalyst is available in fuel cell systems equipped with a fuel-modifying device having a catalyst for hydrogen production, e.g. domestic and business PEFC systems, permits reduction of the starting time and can maintain a high performance over a long period. |
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