کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1281876 | 1497535 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mesoporous carbon supported PtRu as anode catalyst for direct methanol fuel cell: Polarization measurements and electrochemical impedance analysis of mass transport Mesoporous carbon supported PtRu as anode catalyst for direct methanol fuel cell: Polarization measurements and electrochemical impedance analysis of mass transport](/preview/png/1281876.png)
The performance of membrane electrode assembly (MEA) prepared with PtRu nanoparticles supported on a mesoporous carbon as anode catalyst are presented and compared against PtRu synthesized over Vulcan carbon. Polarization and power curves were obtained using 1 M methanol aqueous solution at the anode and O2 at the cathode. The mesoporous carbon supported catalyst shows peak power of 40 mW cm−2 and 67 mW cm−2 at 30 °C and 60 °C respectively, that is, 15–30% higher than the Vulcan supported catalyst, and exhibits a wider range of operating current. Moreover, an improvement in the mass transport is observed for the catalyst supported on mesoporous carbon, yielding a lower voltage drop at high current density. This behavior was confirmed by electrochemical impedance spectroscopy (EIS), where an increases of the Warburg coefficient value by a factor 3–4 for the catalyst supported on mesoporous carbon as compared with that supported on Vulcan, would indicate a more facile diffusion of methanol through the mesoporous carbon.
► PtRu supported on mesoporous carbon as anode catalyst for DMFC.
► Polarization measurements of active feed fuel cell.
► EIS measurements of working fuel cell at high current density.
► Higher peak power density for PtRu/MC than PtRu/C.
► Lower Warburg impedance for PtRu/MC compared to PtRu/C.
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 10, 1 April 2013, Pages 4116–4123