Effect of the electrode structure on the electrocatalytic oxidation of low-weight alcohols. Applications to the direct alcohol fuel cell
- Univ. de Poitiers (France)
The use of an electron conducting polymer, such as polyaniline (PAni), as a catalyst support, is a very convenient way to obtain highly dispersed electrodes for the electrooxidation of low-weight alcohols (methanol and ethanol). Such electrodes, containing very low amounts of platinum, can be modified by adding a second metal in order to promote the electrocatalytic activity of pure platinum. With Pt-Ru or Pt-Sn/PAni modified electrodes, a relative large negative shift of the oxidation potential was observed, particularly with ethanol, for which the electrooxidation starts at potentials as low as 0.2 V/RHE. Moreover a significant decrease of the poisoning phenomena was also observed. The nature of the adsorbed species and reaction products was also investigated by on-line liquid chromatography and in situ IR Reflectance Spectroscopy.
- OSTI ID:
- 33602
- Report Number(s):
- CONF-940529-; ISBN 1-56677-080-7; TRN: IM9518%%422
- Resource Relation:
- Conference: 185. Electrochemical Society meeting, San Francisco, CA (United States), 22-27 May 1994; Other Information: PBD: 1994; Related Information: Is Part Of Electrode materials and processes for energy conversion and storage. Proceedings Volume 94-23; Srinivasan, S. [ed.] [Texas A and M Univ., College Station, TX (United States). Energy Research Center]; Macdonald, D.D. [ed.] [Pennsylvania State Univ., University Park, PA (United States)]; Khandkar, A.C. [ed.] [Ceramatec, Salt Lake City, UT (United States)]; PB: 517 p.
- Country of Publication:
- United States
- Language:
- English
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