Journal article
The effect of loading and particle size on the oxygen reaction in CGO impregnated Pt electrodes
Electrochemistry, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Physical Chemistry, Department of Chemistry, Technical University of Denmark2
Department of Chemistry, Technical University of Denmark3
Microstructures and Interfaces, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
Risø National Laboratory for Sustainable Energy, Technical University of Denmark6
Porous platinum electrodes impregnated with Gd x Ce1−x O2−δ (CGO) are investigated to characterise how nano-sized CGO grains affect the oxygen reaction. Impedance measurements were performed at temperatures between 450 and 750 °C and at oxygen partial pressures of 0.2 and 5 × 10−5 bar for electrodes with various CGO loadings and electrodes annealed at various temperatures.
The morphology was characterised by scanning electron microscopy and the CGO grain size was determined from X-ray diffraction peak broadening. The results showed that the polarisation resistance decreased with increasing CGO loading and increasing annealing temperature. CGO facilitates transport of oxygen ions thereby increasing the effective triple-phase boundary.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2012 |
| Pages: | 1161-1168 |
| Journal subtitle: | Current Research and Development in Science and Technology |
| ISSN: | 14330768 and 14328488 |
| Types: | Journal article |
| DOI: | 10.1007/s10008-011-1489-2 |
| ORCIDs: | Hansen, Karin Vels and Mogensen, Mogens Bjerg |
