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, CHIARAInvestigation
;GIRELLA, ALESSANDROInvestigation
;CARRETTA, PIETROSupervision
;SANNA, SAMUELESupervision
2017-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
