Direct methanol fuel cells: The influence of methanol on the reduction of oxygen over Pt/C catalysts with different particle sizes |
| |
| Authors: | W Z Li S Q Song W J Zhou G Q Sun Q Xin C Poulianitis P Tsiakaras |
| |
| Institution: | (1) Direct Alcohol Laboratory, Chinese Academy of Sciences, 116023 Dalian, China;(2) State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China;(3) Department of Mechanical and Industrial Engineering, School of Engineering, University of Thessaly, Pedion Areos, 383 34 Volos, Greece |
| |
| Abstract: | Two Pt/C catalysts with different particle sizes (Pt/C: 2.5 nm, Pt/C-700Ar: 5.1 nm) were investigated by applying a half-cell
configuration —rotating disk electrode (RDE) technique in H2SO4 aqueous solutions in the absence of or in the presence of methanol with different concentrations. Pt/C catalyst exhibited
higher mass activity in H2SO4 aqueous solution without methanol and slightly lower mass activity in H2SO4 plus 0.1 mol/L CH3OH in comparison with that of Pt/C-700Ar catalyst. On the contrary,single direct methanol fuel cell (DMFC) tests showed that Pt/C exhibited higheroxygen reduction reaction (ORR) activity and better cell performance, mainly due to the different kinds of electrolyte properties. Furthermore, it
suggested that a better single DMFC performance could be obtained with a smaller particle size Pt-based cathode catalyst.
Paper presented at the Patras Conference on Solid State Ionics — Transport Properties, Patras, Greece, Sept. 14 — 18, 2004. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
