Surface chemical sensitivity of polyaniline doped with palladium or platinum compounds
✍ Scribed by J. W. Sobczak; A. Kosiński; A. Biliński; J. Pielaszek; W. Palczewska
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 143 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1616-301X
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✦ Synopsis
The chemical and structural surface-aging effects brought about by the presence of water in emeraldine base (EB) polyaniline (PANI) doped with Pd or Pt protonic acids were studied. IR spectroscopy, XRD, XPS and heterogeneous catalytic hydrogenation (alkyne 3 alkene 3 alkane) were applied to characterise the PANI-Pd and PANI-Pt. Interpretation of the results gave the surface characteristics, structure, chemical catalytic activity and stability mainly of PANI-Pd specimens. The unique form of catalytically active centres therein was the surface complex [PdCl 4 ] 2À with Pd 3d 5/2 BE 337.7 eV. The most promising among the PANI-Pd catalysts studied were those dried in a slow, long procedure (3 months, zeolite 5A). *