| Autor: |
Yamanaka, Toshiro, Takeguchi, Tatsuya, Wang, Guo-Xiong, Muhamad, Ernee Noryana, Ueda, Wataru |
| Zdroj: |
ECS Transactions; October 2010, Vol. 28 Issue: 23 |
| Abstrakt: |
An anode catalyst for a polymer electrolyte fuel cell should be CO-tolerant, i.e., it should have the function of hydrogen oxidation in the presence of CO, since hydrogen fuel gas generated by the steam reforming process of natural gas contains CO. Our recent results showed that highly dispersed PtRu/C (HD) with small metal particles has much higher CO tolerance than that of poorly dispersed PtRu/C (LD) with large metal particles. CO tolerance is often discussed in connection with activity for CO oxidation, but the mechanism of CO oxidation is not clear. To study the mechanism for CO tolerance and CO oxidation, we have developed an apparatus for variable temperature in-situ FT-IR measurements of CO oxidation. It is expected that electro oxidation and thermal CO oxidation of CO can be distinguished from temperature- and potential-dependence CO2 formation and that these dependence will provide some information on the mechanism of CO tolerance of catalysts. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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