Kinetics of NaBH4 hydrolysis on carbon-supported ruthenium catalysts

Zou, Yongjin; Nie, Minfang; Huang, Yongmin; Wang, J.Q.; Liu, H.L.

doi:10.1016/j.ijhydene.2011.06.138

Cited by 54 publications

(14 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact indicates that OH À played dual roles during the hydrolysis of NaBH 4 . Similar phenomenon has been reported for Co [1,26,27] and Ni [4] catalyzed NaBH 4 hydrolysis system, but a negative effect on HGR was always observed for Ru catalyzed system with respect to NaOH at any given concentration [8,37]. Therefore, effect of NaOH concentration on hydrogen generation greatly depends on the catalysts used.…”

Section: Effect Of Naoh Concentration On Hydrogen Generation Performancesupporting

confidence: 80%

Fast hydrogen generation from NaBH4 hydrolysis catalyzed by carbon aerogels supported cobalt nanoparticles

Zhu

Niu

et al. 2013

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Section: Effect Of Naoh Concentration On Hydrogen Generation Performancesupporting

confidence: 80%

Fast hydrogen generation from NaBH4 hydrolysis catalyzed by carbon aerogels supported cobalt nanoparticles

Zhu

Niu

et al. 2013

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…[19] Among metal borohydrides, sodium borohydride (NaBH 4 ) has high hydrogen producing capacity (about 21.2 wt.%, without water included), but the hydrolysis kinetics of NaBH 4 in pure water is sluggish, and expensive catalysts are required. [20,21] In contrast, the hydrolysis kinetics and hydrogen yield of metal/metal hydride are excellent. Various kinds of metal/metal hydride have been investigated for hydrolysis, such as Mg, [22] LiH, [23,24] H-CaMg 2 .…”

Section: Introductionmentioning

confidence: 99%

Controllable Hydrolysis Performance of MgLi Alloys and Their Hydrides

et al. 2019

View full text Add to dashboard Cite

Theoretically, the hydrolysis of MgLi and MgH 2 À LiH can produce 9.6 and 17.5 wt.% hydrogen (water is not included in the calculation), respectively. The ball-milling method is commonly used to refine the particle size and thus may improve hydrolysis kinetics. However, Mg and Li will be easily agglomerated, which means that direct ball-milling could not refine MgLi. In this work, we introduced 10 wt.% expanded graphite into the ballmilling process to synthesize refined MgLi alloy samples. Further studies showed that MgLi-10 wt.% expanded graphite can produce 966 mL/g hydrogen within 3 min in 0.5 M MgCl 2 solution. The MgLi hydrides were synthesized by reactive ball milling under 3 MPa H 2 and their hydrolysis performance was investigated. Moreover, the sawed powder was milled in 3 MPa H 2 for 6 h and then hydrogenated in 3 MPa H 2 at 380°C; it can produce 1542 and 1773 mL/g (15.8 wt.%) hydrogen in 5 and 30 min with mild kinetics, respectively, and the activation energy of the hydrolysis reaction is 24.6 kJ/mol in 1 M MgCl 2 solution. The findings here open a new avenue to the development of refined MgLi alloys and hydrides for hydrogen generation through a controllable hydrolysis process.

show abstract

“…Hydrolysis reaction rate of NaBH 4 solution can be effectively enhanced by using transition metals [12]. Though noble metal catalysts like Ru [13], Pt [14] and Pd [15] have been reported to exhibit high catalytic activity for the hydrolysis of NaBH 4 , non-noble metal catalysts like CoeNieP [16], CoeB [17,18], NieCoeB [19] and CoeNiePeB [20] have been more widely applied to catalytic hydrolysis of NaBH 4 solution because of their low cost and good catalytic activity. Among the non-noble metal catalysts, Coebased catalysts show higher catalytic properties than Niebased catalysts [21], and Coebased catalysts prepared with the addition of transition metals such as W, Mo, Cu, Fe and Cr exhibit superior catalytic activity in hydrogen generation by hydrolysis of alkaline NaBH 4 solution [22].…”

Section: Introductionmentioning

confidence: 99%