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- W2007096413 abstract "Abstract CeCl 3 -doped NaAlH 4 was directly synthesized in hydrogenation process using NaH/Al with 2 mol% CeCl 3 under ball-milling. X-ray diffraction was utilized to unveil the nature of cerium during NaAlH 4 synthesis process and succedent cycling. It is found that, CeCl 3 is reduced in the ball-milling process and following cycles, causing the formation of NaCl and Al–Ce alloy with a structure of CeAl 4 . The catalytic enhancement arising upon doping the ball-milled CeAl 4 alloy is quite similar to that achieved in the CeCl 3 -doped sodium alanate. Because the CeAl 4 dopant does not consume the effective hydrogen storage component, the CeAl 4 -doped NaAlH 4 exhibits more hydrogen storage capacity. Moreover, CeCl 3 -doped NaAlH 4 and CeAl 4 -doped NaAlH 4 exhibit similar apparent activation energies estimated from Kissinger's method, suggesting the reactions are all determined by the same rate-limiting step. These results clearly demonstrate that the in situ formed CeAl 4 acts as active species to catalyze the reversible dehydriding/rehydriding of NaAlH 4 ." @default.
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- W2007096413 date "2011-09-01" @default.
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- W2007096413 title "Investigation on the nature of active species in the CeCl3-doped sodium alanate system" @default.
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- W2007096413 doi "https://doi.org/10.1016/j.jallcom.2010.10.065" @default.
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