| 摘要 |
A cathode catalyst for a fuel cell, a method for preparing the catalyst, a membrane electrode assembly for a fuel cell containing the cathode catalyst, and a fuel cell system containing the membrane electrode assembly are provided to enhance the activity and selectivity to the reduction of an oxidizing agent and the stability of a catalyst under acidic atmosphere by using rhenium-tungsten and/or molybdenum-tellurium alloy. A cathode catalyst comprises a support comprising zeolite; and 5-85 wt% of a rhenium(Rh)-M-tellurium(Te) alloy supported on the support, wherein M is selected from the group consisting of tungsten(W), molybdenum(Mo) and their mixture. Preferably the rhenium-M-tellurium alloy comprises 50-70 atom% of Rh; 25-30 atom% of M; and 5-30 atom% of Te; and the catalyst has an average particle size of 1-4 nm. Preferably the zeolite comprises a cation selected from selected from the group consisting of an alkali metal ion, an alkaline earth metal ion and a hydrogen ion. |
