| High Performance of Direct Methanol Fuel Cell with Double Walled Carbon Nanotubes Film Supported Ptru as Anode Catalyst | ||
| Wenzhen Li, Chemical and Environmental Engineering, University of California, Riverside, Bourns Hall A242, Riverside, CA 92521, Xin Wang, Department of Chemical and Environmental Engineering, University of California, Riverside, Department of Chemical and Environmental Engineering, University of California, Riverside, Riverside, CA 92507, Zhongwei Chen, University of California, Riverside, A242 Bourns Hall, Chemical Engineering, Riverside, CA 92507, Mahesh M. Waje, University of California Riverside, 1122 Linden street, # 105, Riverside, CA 92507 and Yushan Yan, University of California, Riverside, Chemical and Environmental Engineering, 900 University Avenue, Riverside, CA 92521 In this presentation, we used a polyol method to prepare 3 types of CNTs (SWNTs, DWNTs and MWNTs) supported PtRu electrocatalysts. XRD and TEM characterizations shows PtRu nano-particles with a very small particle size and shallow size distribution (2-3 nm) are dispersed onto CNTs uniformly. A modified filtration method was employed to prepare compact PtRu/CNTs film as anode catalyst layer for DMFC. The compact layer has a uniform thickness of 7-8 um for MWNTs and 15-20 um for DWNTs. In RDE test, PtRu/DWNTs exhibits an exceptional high methanol oxidation specific activity compare to PtRu/MWNTs and PtRu/XC-72 samples. The compact MWNTs and DWNTs film based MEAs show better DMFC performance than the traditional MEA. This is probably attributed to its higher specific activity towards methanol oxidation reaction and compact film structure, which offers a good mixture with Nafion and will facilitate methanol transportation. The DMFC with a compact PtRu/DMWTs (50wt%) film with a PtRu electrode loading of 0.34 mg/cm2 have the highest power density of 131 mW/cm2, which is 68 % higher that the traditional MEA with a PtRu metal loading of 2.0 mg/cm2. Extended Abstract Status: Not Uploaded | ||