Synthesis of carbon nanotubes on La0.6Sr0.4CoO₃ as substrate
- Thiele, Doreen University of Fribourg, Physics Department, Switzerland - Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Hydrogen and Energy, Dübendorf, Switzerland
- Colmenarejo, E. Lopez-Camacho Instituto de Ciencia de Materials de Madrid, Spain
- Grobéty, Bernard University of Fribourg, Department of Geoscience, Switzerland
- Züttel, Andreas University of Fribourg, Physics Department, Switzerland - Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Hydrogen and Energy, Dübendorf, Switzerland
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22.08.2008
Published in:
- Diamond and Related Materials. - 2009, vol. 18, no. 1, p. 34-38
English
A carbon nanotube/perovskite composite material was developed as material for air electrodes in fuel cells or zinc-air batteries. For this purpose, carbon nanotubes were directly grown on the perovskite La0.6Sr0.4CoO₃ impregnated with Fe solution which acted as substrate. The synthesis was carried out in a fluidised bed reactor. The carbon source was acetylene. The influence of the temperature on the growth of carbon nanotubes and on the stability of the perovskite was investigated. All samples contained multi-wall carbon nanotubes; however, at a temperature above 675 °C the perovskite was reduced by hydrogen originating from acetylene. The samples with the intact perovskite were further processed to air electrodes to catalyze the oxygen reduction reaction. These electrodes showed an improved performance compared to electrodes made of acetylene black and perovskites.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique, Département de Géosciences
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 11193
- DOI 10.1016/j.diamond.2008.08.001
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300806
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