Sonochemical doping of Ti-catalyzed sodium aluminum hydride

Preparation of a new Ti catalyst for improved performance of NaAlH4

“…These results were similar to results reported in previous studies by Ritter and co-workers on the sonochemical doping of Ti-doped NaAlH 4 [25], on the dehydrogenation and hydrogenation cycling of LiAlH 4 [8], and on the direct synthesis of Na and Li alanates [9]. In the sonochemical doping study [25], they showed that the Ti catalyst obtained when using THF during the sonochemical pretreatment was more effective at improving the dehydrogenation and hydrogenation performance than that obtained when using Et 2 O during the sonochemical pretreatment.…”

“…In the sonochemical doping study [25], they showed that the Ti catalyst obtained when using THF during the sonochemical pretreatment was more effective at improving the dehydrogenation and hydrogenation performance than that obtained when using Et 2 O during the sonochemical pretreatment. It was surmised that THF produced smaller catalyst particles than Et 2 O.…”

“…A wet/dry sonochemical doping technique with TiCl 3 was also developed [25] that resulted in a dehydrogenation and hydrogenation performance similar to that reported for Ti nanoclusters [13], graphite, Al and TiCl 3 [20], CeCl 3 [18], and ScCl 3 [19]. However, for many reasons, including cost, availability, manufacturing, and ease of use, the dry and wet/dry doping techniques with HEBM have emerged as the most preferred methods for doping NaAlH 4 , and TiCl 3 has emerged as the most preferred precursor [3].…”

Amorphous Al1−xTix, Al1−xVx, and Al1−xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems

“…Later studies have shown that the hydrogenation rates for low mol% TiCl 3 (2-4 mol%) enhanced NaAlH 4 can dramatically increase (up to ca. 27-65 wt.% H/hour for desorption [4,5]) if a pre-milling step utilizing Tetrahydrofuran is utilized. This suggests that poor mixing/distribution of the TiCl 3 additive occurs when only dry milling of NaAlH 4 + xTiCl 3 is performed.…”

Ultrasound-assisted preparation of titania–alumina support with high surface area and large pore diameter by modified precipitation method

“…They found that synthesis route effectively could reduce the total synthesis time from days to a few hours and the resultant materials exhibited a hexagonally ordered mesostructure with high surface area over 560 m 2 /g, pore volume over 0.6 mL/g and large pore diameter in the range of 4.1-4.9 nm. The sonochemical processing has been developed to be a useful technique for the nanomaterial preparation [11][12][13][14][15][16][17]. Many nanomaterials such as TiO 2 [18,19], WO 3 [20], MoS 2 [21], Fe 2 O 3 [22,23] and Al 2 O 3 [24] have been prepared using this process.…”