Abstract
The effect of base metal oxide (nonnoble metal oxide) in a Pt-Cr-Cu alloy catalyst is investigated for the oxygen reduction reaction in a solid-polymer-electrolyte fuel cell. The cathode mass activities at 0.9 V for Pt, Pt-Cr alloy, Pt-Cr-Cu alloy, and a mixture of Pt-Cr-Cu alloy with base metal oxide are compared. The enhancement factor is largest (about 6 times) for the mixture of Pt-Cr-Cu alloy with base metal oxide, compared to Pt-Cr and Pt-Cr-Cu alloys (about 2 times). The higher electrocatalytic activity of this material may be due to the combined effects of the Pt-Cr-Cu alloy and the base metal oxide. The physical and electrochemical characterizations are carried out using various techniques like x-ray diffraction, transmission electron microscopy, cyclic voltammetry, polarization, and ac impedance.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 968-975 |
| Number of pages | 8 |
| Journal | Journal of the Electrochemical Society |
| Volume | 141 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1994 |
| Externally published | Yes |
Keywords
- catalysis
- catalysts
- electrochemical analysis
- electrochemistry
- proton exchange membrane fuel cells
- reduction (chemical)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry