کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1275524 | 1497564 | 2012 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Application of silica as a catalyst support at high concentrations of methanol for direct methanol fuel cells Application of silica as a catalyst support at high concentrations of methanol for direct methanol fuel cells](/preview/png/1275524.png)
Various silica particles were adopted as catalyst supports, and silica-supported PtRu catalysts were evaluated as catalysts for the anode of direct methanol fuel cells at methanol concentrations of 1–10 M through single cell tests. Compared to a carbon black supported Pt–Ru catalysts, the silica-supported Pt–Ru catalysts exhibited higher performance in MEA, especially with high concentration over 3 M, and the maximum power density reached to 90 mW cm−2 and 60 mW cm−2 with 5 M and 10 M, respectively, which were 1.5 and 3 times higher than the reference carbon black supported catalysts. It was found that the silica particles as a catalyst support have a significant effect on reduction of methanol crossover and control of fuel feeding. Such a high performance in the operation with high concentrations was confirmed in the long-term durability test.
► Various silicas adopted as catalyst supports.
► PtRu/(silicas) prepared by the impregnation method.
► Single cell tests using 1–10 M methanol.
► Silica as a catalyst support was effective to mitigate methanol crossover.
► PtRu/(silicas) show increase of the cell performance at 3–10 M methanol.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 5, March 2012, Pages 4619–4626