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- Title
Paramagnetic centers in single-walled carbon nanotubes encapsulated with palladium and their interaction with hydrogen at H/C ≥ 1.0.
- Authors
Lipson, A.; Saunin, E.; Lyakhov, B.; Tsivadze, A.
- Abstract
The nature of paramagnetic centers in a nanostructure based on single-walled carbon nanotubes (SWCNTs) encapsulated with Pd was studied by EPR spectroscopy at 77 and 293 K. It was found that strong charge-transfer π complexes of the (Pd-C x ) type, which manifested themselves as a narrow resonance (Δ H = 6–8 G and g = 2.002 at T = 77 k), were formed in the Pd-SWCNT composite along with impurity centers (Fe3O4 nanoparticles within the nanotubes), which were responsible for a broad EPR signal (Δ H = 75 G and g = 2.065 at T = 293 K). These complexes were found to be predominant adsorption sites responsible for a high gravimetric density of hydrogen (H/C ≥ 1.0) within the single-walled carbon nanotubes.
- Subjects
ELECTRON paramagnetic resonance; CARBON; NANOTUBES; SPECTRUM analysis; GRAVIMETRIC analysis
- Publication
JETP Letters, 2008, Vol 88, Issue 3, p178
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364008150071