Paramagnetic centers in single-walled carbon nanotubes encapsulated with palladium and their interaction with hydrogen at H/C ≥ 1.0

Autor:	Boris F. Lyakhov, E. I. Saunin, A. Yu. Tsivadze, Andrei Lipson
Rok vydání:	2008
Předmět:	Nanostructure Materials science Physics and Astronomy (miscellaneous) Hydrogen chemistry.chemical_element Carbon nanotube Resonance (chemistry) law.invention Paramagnetism Crystallography Nuclear magnetic resonance chemistry law Gravimetric analysis Electron paramagnetic resonance Palladium
Zdroj:	JETP Letters. 88:178-182
ISSN:	1090-6487 0021-3640
DOI:	10.1134/s0021364008150071
Popis:	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-Cx) type, which manifested themselves as a narrow resonance (ΔH = 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 (ΔH = 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::05c77bdcbafb8505eb9c61b5b850974e https://doi.org/10.1134/s0021364008150071 Zobrazit plný text záznamu Plný text ve formátu PDF