Hydrogen generation and storage from hydrolysis of sodium borohydride in batch reactors

Hydrogen (H2) is a clean energy carrier which can help to solve environmental issues with the depletion of fossil fuels. Sodium borohydride (NaBH4) is a promising candidate material for solid state hydrogen storage due to its huge hydrogen storage capacity and nontoxicity. However, the hydrolysis of NaBH4 usually requires expensive noble metal catalysts for a high H2 generation rate (HGR). Here, we synthesized high-aspect ratio copper nanowires (CuNWs) using a hydrothermal method and used them as the catalyst for the hydrolysis of NaBH4 to produce H2. The catalytic H2 generation demonstrated that 0.1 ng of CuNWs could achieve the highest volume of H2 gas in 240 min. The as-prepared CuNWs exhibited remarkable catalytic performance: the HGR of this study (2.7 × 1010 mL min−1 g−1) is ~3.27 × 107 times higher than a previous study on a Cu-based catalyst. Furthermore, a low activation energy (Ea) of 42.48 kJ mol−1 was calculated. Next, the retreated CuNWs showed an outstanding and stable performance for five consecutive cycles. Moreover, consistent catalytic activity was observed when the same CuNWs strip was used for four consecutive weeks. Based on the results obtained, we have shown that CuNWs can be a plausible candidate for the replacement of a costly catalyst for H2 generation.

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CoO-Co2P composite nanosheets as highly active catalysts for sodium borohydride hydrolysis to generate hydrogen

Functional Materials Letters ◽

10.1142/s179360472051025x ◽

2020 ◽

Vol 13 (06) ◽

pp. 2051025

Author(s):

Hongyan Liu ◽

Qianyu Shi ◽

Yumei Yang ◽

Ya-Na Yu ◽

Yan Zhang ◽

...

Keyword(s):

Sodium Borohydride ◽

Hydrogen Generation ◽

Sodium Hypophosphite ◽

X Ray Diffraction ◽

Water Displacement ◽

X Ray ◽

Highly Active ◽

Naoh Solution ◽

Adsorption Desorption ◽

Hydrolysis Of

In this paper, CoO[Formula: see text]Co2P composite nanocatalysts as highly active catalysts were successfully prepared for catalytic hydrolysis of sodium borohydride (NaBH[Formula: see text] to generate hydrogen. For catalyst preparation, pre-synthesized Co(OH)2 nanosheets were uniformly mixed with sodium hypophosphite (NaH2PO[Formula: see text] and then treated through vapor-phase phosphorization process. For characterization, field-emission scanning electron microscopy (FE-SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), N2 adsorption–desorption measurement and X-ray photoelectric spectroscopy (XPS) were carried out, and traditional water-displacement method was performed to measure the hydrogen generation rate (HGR). It was found that component and catalytic activity of the composites were greatly affected by the ratio of Co(OH)2 to NaH2PO2. When the ratio was 2:1, the obtained catalyst composed of CoO and Co2P presented the highest HGR up to 3.94[Formula: see text]L min[Formula: see text] g[Formula: see text] using a 2[Formula: see text]wt.% NaBH[Formula: see text][Formula: see text]wt.% NaOH solution at [Formula: see text]C, and the apparent activation energy was detected as low as 27.4[Formula: see text]kJ mol[Formula: see text]. Additionally, the optimum CoO[Formula: see text]Co2P catalyst still retains 60% of the initial activity after recycling four times.

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Ruthenium supported on ZIF-67 as an enhanced catalyst for hydrogen generation from hydrolysis of sodium borohydride

Chemical Engineering Journal ◽

10.1016/j.cej.2018.06.082 ◽

2018 ◽

Vol 351 ◽

pp. 48-55 ◽

Cited By ~ 49

Author(s):

Duong Dinh Tuan ◽

Kun-Yi Andrew Lin

Keyword(s):

Sodium Borohydride ◽

Hydrogen Generation ◽

Hydrolysis Of

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Hydrogen generation by both acidic and catalytic hydrolysis of sodium borohydride

Catalysis for Sustainable Energy ◽

10.1515/cse-2018-0006 ◽

2018 ◽

Vol 5 (1) ◽

pp. 41-48 ◽

Cited By ~ 4

Author(s):

Olga V. Netskina ◽

Tihon N. Filippov ◽

Oksana V. Komova ◽

Valentina I. Simagina

Keyword(s):

Hydrogen Evolution ◽

Sodium Borohydride ◽

Hydrogen Generation ◽

Hydrogen Release ◽

Catalytic Hydrolysis ◽

Hydrogen Storage Materials ◽

Acidic Solutions ◽

High Concentrations ◽

Sulfuric And Hydrochloric Acids ◽

Hydrolysis Of

Abstract Sodium borohydride tablets have been employed as hydrogen-storage materials. Hydrogen release was performed by acidic hydrolysis where solutions of sulfuric and hydrochloric acids were added to the tablets, and by catalytic hydrolysis where water was added tablets of solid-state NaBH4/Co composite. In acidic solutions hydrogen evolution occurred instantaneously, and at high concentrations of acids the releasing hydrogen contained an admixture of diborane. Hydrogen evolution from the solidstate NaBH4/Co composite proceeded at a uniform rate of 13.8±0.1 cm3·min-1, water vapor being the only impurity in the evolving gas.

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