Oxygen reduction activity of Pt and Pt-Mn-Co electrocatalysts sputtered on nano-structured thin film support |
| |
| Authors: | Arman Bonakdarpour George D Vernstrom Alison K Schmoeckel Jeff R Dahn |
| |
| Affiliation: | a Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada
b 3M Fuel Cell Components Program, 201-2N-19, 3M Center, St. Paul, MN 55144, USA |
| |
| Abstract: | We report on extensive measurements of oxygen reduction activity of Pt and Pt-Co-Mn electrocatalysts using the rotating ring-disk electrode (RRDE) method. The electrocatalysts were prepared by sputtering from Pt or Pt, Co and Mn targets onto 3M's nano-structured thin film support (NSTF) structures. The area specific activity of Pt/NSTF, measured in 0.1 M HClO4 and at room temperature, is similar to that of bulk Pt. The area specific measurements show a 20 mV reduction in the Pt-Co-Mn/NSTF overpotential compared to Pt/NSTF. The corresponding kinetic gain in the area specific activity of the ternary alloy is about a factor of two. This ORR enhancement factor observed in the ternary Pt-Co-Mn/NSTF by RRDE measurements is similar to the results obtained in 50 cm2 H2/air fuel cells. |
| |
| Keywords: | Nano-structured thin film support Ternary Pt-Co-Mn alloy Oxygen reduction RRDE |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
