The methanol oxidation property of catalyst supported on the nano-tunneled carbon nanofiber (CNF) was studied to improve the activity of Pt-Ru/CNF catalyst for the performance of the direct methanol fuel cell. A new material composed of CNF, which are highly porous and have a very narrow distribution of nanopores distributed radially within the fiber, was developed. The Pt-Ru catalytic performances of defined parts of carbons, such as nano-pores, edge and basal planes, oxygen functional groups, and Ru content were studied. Measurements of methanol oxidation property were conducted using 60 wt % Pt-Ru (1:1 mole/mole) supported on the nano-tunneled CNF using three-electrode half cell connected cyclic voltammetry system. The anodic performance of catalyst supported on the nano-tunneled CNF was compared to that of the commercial E-TEK catalyst. The methanol oxidation properties of H-CNF and E-TEK catalysts showed almost the same about 120 mA. However, it was improved in the PtRu 60 wt %/CNF catalyst supported on the nano-tunneled CNF to be 280 mA. The improvement of the methanol oxidation capability should be from the increase of the effective surface area of supporting material, contact among the catalyst, proton conducting material and methanol, and decrease of the internal resistance from the micropore. This is an abstract of a paper presented at the ACS Fuel Chemistry Meeting (San Diego, CA Spring 2005).
|ジャーナル||ACS Division of Fuel Chemistry, Preprints|
|出版ステータス||出版済み - 7 26 2005|
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