Kinetic characteristics of sodium borohydride formation when sodium meta-borate reacts with magnesium and hydrogen

Liu, B.H.; Li, Z.P.; Morigasaki, N.; Suda, S.

doi:10.1016/j.ijhydene.2007.12.033

Cited by 49 publications

(26 citation statements)

References 13 publications

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“…The activation energy obtained in this work is about twice the value obtained for Raney nickel (50.7 kJ/mol) in [13] and Ni-Ru nanocomposite (52.73 kJ/mol) in [25].…”

Section: Kinetic Parameterssupporting

confidence: 42%

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Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

Anderson

Kalu

2013

Crystals

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Catalysts based on electroless nickel and bi-metallic nickel-molybdenum nanoparticles were synthesized for the hydrolysis of sodium borohydride for hydrogen generation. The catalysts were synthesized by polymer-stabilized Pd nanoparticle-catalyzation and activation of Al 2 O 3 substrate and electroless Ni or Ni-Mo plating of the substrate for selected time lengths. Catalytic activity of the synthesized catalysts was tested for the hydrolyzation of alkaline-stabilized NaBH 4 solution for hydrogen generation. The effects of electroless plating time lengths, temperature and NaBH 4 concentration on hydrogen generation rates were analyzed and discussed. Compositional analysis and surface morphology were carried out for nano-metallized Al 2 O 3 using Scanning Electron Micrographs (SEM) and Energy Dispersive X-Ray Microanalysis (EDAX). The as-plated polymer-stabilized electroless nickel catalyst plated for 10 min and unstirred in the hydrolysis reaction exhibited appreciable catalytic activity for hydrolysis of NaBH 4 . For a zero-order reaction assumption, activation energy of hydrogen generation using the catalyst was estimated at 104.6 kJ/mol. Suggestions are provided for further work needed prior to using the catalyst for portable hydrogen generation from aqueous alkaline-stabilized NaBH 4 solution for fuel cells.

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“…The activation energy obtained in this work is about twice the value obtained for Raney nickel (50.7 kJ/mol) in [13] and Ni-Ru nanocomposite (52.73 kJ/mol) in [25].…”

Section: Kinetic Parameterssupporting

confidence: 42%

“…A catalyst is needed to promote hydrogen generation from these alkaline solutions. Another advantage NaBH 4 has over NH 3 BH 3 is that the NaBO 2 by-product can be recycled to synthesize NaBH 4 [12][13][14]. Metal catalysts have been shown to be effective promoters for hydrogen generation from the hydrolysis of NaBH 4 .…”

Section: Introductionmentioning

confidence: 99%

Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

Anderson

Kalu

2013

Crystals

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“…Recently, hydrogen generation from NaBH 4 hydrolysis is proved to be a feasible hydrogen supply method for the PEMFC [1], which can be promoted by using ex situ [1][2][3][4][5][6][7] or in situ [8][9][10][11] synthesized catalysts during the hydrogen generation reaction. Also, the by-product NaBO 2 is environmentally clean and can be recycled for synthesizing NaBH 4 [12]. Therefore, NaBH 4 hydrolysis is regarded as an efficient and environmental friendly hydrogen generation method and catches more and more attention.…”

Section: Introductionmentioning

confidence: 99%

Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

Bai

Danxian

et al. 2011

Catalysis Today

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“…Kojima et al [66] tried to directly react Mg with NaBO2 under hydrogen, but the yield was extremely low, which may have resulted from the produced MgO obstruction. To promote the yield, Kojima et al [66] found that Si addition could remarkably increase the NaBH4 yield and Liu et al [72] found transition metals, like Ni, Fe, and Co, addition could also promote the NaBH4 yield. However, both Si and transition metals keep …”

Section: Nabh4 Regeneration Via the Reaction Between Metal Or Other Hmentioning

confidence: 99%

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang

Zhong

et al. 2018

Inorganics

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NaBH 4 hydrolysis can generate pure hydrogen on demand at room temperature, but suffers from the difficult regeneration for practical application. In this work, we overview the state-of-the-art progress on the regeneration of NaBH 4 from anhydrous or hydrated NaBO 2 that is a byproduct of NaBH 4 hydrolysis. The anhydrous NaBO 2 can be regenerated effectively by MgH 2 , whereas the production of MgH 2 from Mg requires high temperature to overcome the sluggish hydrogenation kinetics. Compared to that of anhydrous NaBO 2 , using the direct hydrolysis byproduct of hydrated NaBO 2 as the starting material for regeneration exhibits significant advantages, i.e., omission of the high-temperature drying process to produce anhydrous NaBO 2 and the water included can react with chemicals like Mg or Mg 2 Si to provide hydrogen. It is worth emphasizing that NaBH 4 could be regenerated by an energy efficient method and a large-scale regeneration system may become possible in the near future.

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Kinetic characteristics of sodium borohydride formation when sodium meta-borate reacts with magnesium and hydrogen

Cited by 49 publications

References 13 publications

Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

Electroless Nickel-Based Catalyst for Diffusion Limited Hydrogen Generation through Hydrolysis of Borohydride

Ni–Co–B catalyst-promoted hydrogen generation by hydrolyzing NaBH4 solution for in situ hydrogen supply of portable fuel cells

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

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