Methanol oxidation on carbon-supported Pt–Ru and TiO2 (Pt–Ru/TiO2/C) electrocatalyst prepared using polygonal barrel-sputtering method
✍ Scribed by Kazuki Hirakawa; Mitsuhiro Inoue; Takayuki Abe
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 780 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0013-4686
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✦ Synopsis
Methanol oxidation performance of a carbon-supported Pt-Ru alloy catalyst used at the direct methanol fuel cell (DMFC) anode is improved by adding TiO 2 . However, the methanol oxidation performance of the electrocatalyst described above must be enhanced further to realize practical application in DMFCs. In this study, we used our original surface-modifying technique termed the "polygonal barrel-sputtering method" to prepare a carbon-supported Pt-Ru and TiO 2 (Pt-Ru/TiO 2 /C) electrocatalyst offering higher methanol oxidation performance. The obtained results show that the methanol oxidation performance of the prepared Pt-Ru/TiO 2 /C is superior to that using wet process as the TiO 2 deposition method. Furthermore, for our sputtering method, the peak current of methanol oxidation on the Pt-Ru/TiO 2 /C is enhanced by increasing the TiO 2 deposited amount up to 2.8 wt.%. These results suggest that a Pt-Ru/TiO 2 interface area is increased using the polygonal barrel-sputtering method, providing the high methanol oxidation performance of Pt-Ru/TiO 2 /C.