Investigations on the desorption kinetics of Mm-doped NaAlH4

Cycling properties of Sc- and Ce-doped NaAlH4 hydrogen storage materials prepared by the one-step direct synthesis method

“…A possible solution to this problem might be provided by the recent research progress in the fields of fuel cell membranes [18] and dehydrogenation catalysis [19]. Using the so-called hightemperature PEM fuel cells based on novel polybenzimidazole membranes [18], the temperature of the waste heat might possibly be raised to the level necessary for desorption of hydrogen from both steps of the doped NaAlH 4 storage material.…”

“…At this temperature the dissociation pressure of the NaAlH 4 system should be sufficiently high to allow desorption at a sufficient rate. On the other hand, it has been reported [19] that using mischmetal (2 mol%) with 42 at.% of Ce as a dopant for NaAlH 4 , at normal pressure and 150 • C, 3.7 wt.% of hydrogen can be desorbed in 60 and ∼5 wt.% in 180 min. These results mean that using a high-temperature PEM fuel cell in combination with the mischmetal as a dopant for NaAlH 4 the crucial problem of Fig.…”

Ultrafine Amorphous Co–Fe–B Catalysts for the Hydrolysis of NaBH4 Solution to Generate Hydrogen for PEMFC

“…Recently, great attention has been paid to complex hydrides such as NaBH 4 [8][9][10], LiBH 4 [11][12][13] and NaAlH 4 [14][15][16]. In this wide variety of materials, sodium borohydride (NaBH 4 ) is receiving increasing attention for its high theoretical hydrogen contents of 10.8 wt.-% and stability of solution under high pH value.…”

Microstructure and desorption properties study of catalyzed NaAlH4

“…The catalytic effect is in the following decreasing order: SmCl 3 > CeCl 3 > TiCl 3 > NdCl 3 > GdCl 3 > LaCl 3 > ErCl 3 . The effect of rare-earth elements on hydrogenation/dehydrogenation behavior has been studied by Pukazhselvan et al [12]. Compared to a Ti catalyst, misch metal is more effective for enhancing the desorption kinetics and rehydrogenation of NaAlH 4 .…”