Lithium and hydrogen dynamics in Li12C60 and Li12C60Hy are investigated by means of 7Li and 1H solid state NMR (NMR) in the temp. range 80-​550 K. Differential scanning calorimeter characterization on the hydrogen sorption and desorption and X-​rays structural anal. are also reported. In the pure phase, the 7Li results show a thermally activated dynamic that can be assocd. to Li motions within the crystal interstices. Upon hydrogenation, Li ionic motion is considerably hindered by the presence of hydrofullerene mols. The 1H measurements show that C-​H bonds are stable on the local scale up to 400-​450 K. The NMR results at higher temps. are compatible with a H diffusion mechanism which anticipates the H desorption process.

H and Li dynamics in Li12C60 and Li12C60Hy

SARZI AMADE', NICOLA
Writing – Original Draft Preparation
;
MILANESE, CHIARA
Investigation
;
GIRELLA, ALESSANDRO
Investigation
;
CARRETTA, PIETRO
Supervision
;
SANNA, SAMUELE
Supervision
2017

Abstract

Lithium and hydrogen dynamics in Li12C60 and Li12C60Hy are investigated by means of 7Li and 1H solid state NMR (NMR) in the temp. range 80-​550 K. Differential scanning calorimeter characterization on the hydrogen sorption and desorption and X-​rays structural anal. are also reported. In the pure phase, the 7Li results show a thermally activated dynamic that can be assocd. to Li motions within the crystal interstices. Upon hydrogenation, Li ionic motion is considerably hindered by the presence of hydrofullerene mols. The 1H measurements show that C-​H bonds are stable on the local scale up to 400-​450 K. The NMR results at higher temps. are compatible with a H diffusion mechanism which anticipates the H desorption process.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1180764
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