scholarly journals Synthesis of Fe-Fe2B catalysts via solvothermal route for hydrogen generation by hydrolysis of NaBH4

2018 ◽  
Author(s):  
Mustafa BARIŞ ◽  
Tuncay Şimşek ◽  
Hatice Taşkaya
Keyword(s):  
Hydrogen Generation ◽  
Solvothermal Route ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

Thin-film CoB catalyst templates for the hydrolysis of NaBH4 solution for hydrogen generation

2009 ◽  
Vol 86 (3-4) ◽  
pp. 137-144 ◽  
Author(s):  
Palanichamy Krishnan ◽  
Suresh G. Advani ◽  
Ajay K. Prasad
Keyword(s):  
Thin Film ◽  
Hydrogen Generation ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

scholarly journals Copper Nanowires as Highly Efficient and Recyclable Catalyst for Rapid Hydrogen Generation from Hydrolysis of Sodium Borohydride

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1153 ◽  
Author(s):  
Aina Shasha Hashimi ◽  
Muhammad Amirul Nazhif Mohd Nohan ◽  
Siew Xian Chin ◽  
Poi Sim Khiew ◽  
Sarani Zakaria ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Sodium Borohydride ◽  
Fossil Fuels ◽  
Hydrogen Generation ◽  
Clean Energy ◽  
Catalytic Performance ◽  
Copper Nanowires ◽  
H2 Generation ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

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.

Sustainable Hydrogen Generation by Catalytic Hydrolysis of NaBH4 Using Tailored Nanostructured Urchin-like CuCo2O4 Spinel Catalyst

2019 ◽  
Vol 150 (2) ◽  
pp. 586-604 ◽  
Author(s):  
Komal N. Patil ◽  
Divya Prasad ◽  
Jayesh T. Bhanushali ◽  
Hern Kim ◽  
Amol B. Atar ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

Hydrogen generation by hydrolysis of NaBH4 using nanocomposites

2021 ◽  
pp. 231-248
Author(s):  
Nurgul Kızıltas ◽  
Yasar Karatas ◽  
Mehmet Gulcan ◽  
Sibel Demiroglu Mustafov ◽  
Fatih Sen
Keyword(s):  
Hydrogen Generation ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

Hydrogen Production by Hydrolysis of NaBH4 with Cr-Ni-W-B Catalyst: Effects of Cold Plasma and Chromium Content

2016 ◽  
Vol 14 (1) ◽  
pp. 351-359 ◽  
Author(s):  
Ömer Şahin ◽  
Cafer Saka ◽  
Arzu Ekinci ◽  
Asım Balbay
Keyword(s):  
Cold Plasma ◽  
Hydrogen Generation ◽  
Area Measurement ◽  
Bet Surface Area ◽  
Temperature Plasma ◽  
Catalyst Composition ◽  
Surface Area Measurement ◽  
Carbon Dioxide Plasma ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

AbstractIn this study, the hydrogen generation from the hydrolysis of NaBH4 with Cr0.0125-Ni-W-B catalyst prepared in the presence of cold plasma was investigated based on Cr content, NaBH4 concentration, NaOH concentration, temperature, plasma applying time and plasma gases effects. The results of the activity tests indicate that the choice of Cr and the catalyst composition greatly influenced the activity as well as the selectivity for hydrogen generation from the hydrolysis of NaBH4. The Cr0.0125-Ni-W-B catalyst was treated with argon, nitrogen and carbon dioxide plasma at different treatment times. The catalysts were characterized using SEM, BET surface area measurement and XRD.

scholarly journals Electrosynthesis of Ni-Co/Hydroxyapatite as a Catalyst for Hydrogen Generation via the Hydrolysis of Aqueous Sodium Borohydride (NaBH4) Solutions

2021 ◽  
Vol 15 (3) ◽  
pp. 389-394
Author(s):  
Adrian Nur ◽  
◽  
Anatta W. Budiman ◽  
Arif Jumari ◽  
Nazriati Nazriati ◽  
...  
Keyword(s):  
Current Density ◽  
Hydrogen Generation ◽  
Carbon Anode ◽  
Bipolar Membrane ◽  
Dc Power ◽  
Production Of Hydrogen ◽  
Catalyst Formation ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4 ◽  
A Current

To generate hydrogen from its storage as NaBH4, a catalyst was synthesized via an electrochemical method. The catalyst, Ni-Co, had hydroxyapatite as a support catalyst. The electrochemical cell consisted of a DC power supply, a carbon anode and cathode, and a bipolar membrane to separate the cell into two chambers. The current density was adjusted to 61, 91, and 132 mA/cm2. The electrolysis time was 30, 60, and 90 min. The particles produced were analyzed by XRD and SEM/EDX and tested in the hydrolysis of NaBH4 for hydrogen generation. The Ni-Co/HA catalyst test concluded that the period of time used for electrolysis during catalyst formation was positively correlated with the rate of NaBH4 hydrolysis in the production of hydrogen. The highest rate of hydrogen production was obtained using the synthesized catalyst with a current density of 92 mA/cm2. The NaBH4 hydrolysis reaction followed a first-order reaction with the rate constant of (2.220–14.117)•10-3 l/(g•min). The Arrhenius equation for hydrolysis reactions within the temperature range of 300–323 K is k = 6.5•10-6exp(-6000/T).

Hydrogen generation from hydrolysis of NaBH4 based on high stable NiB/NiFe2O4 catalyst

2017 ◽  
Vol 42 (7) ◽  
pp. 3971-3980 ◽  
Author(s):  
Zhihua Liang ◽  
Qiming Li ◽  
Fang Li ◽  
Shiduo Zhao ◽  
Xin Xia
Keyword(s):  
Hydrogen Generation ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

Ni-, Co- and Pt-based nanocatalysts for hydrogen generation via hydrolysis of NaBH4

2021 ◽  
pp. 94-104
Author(s):  
V. Yartys ◽  
◽  
I. Zavaliy ◽  
A. Kytsya ◽  
V. Berezovets ◽  
...  
Keyword(s):  
Metallic Nanoparticles ◽  
Hydrogen Generation ◽  
Bimetallic Nanoparticles ◽  
Exchange Capacity ◽  
Polyol Synthesis ◽  
Efficient Catalyst ◽  
Co Nanoparticles ◽  
Modified Polyol Method ◽  
Hydrolysis Of ◽  
Hydrolysis Of Nabh4

Ni-, Co- and Pt-based nanostructures were prepared via different physical-chemical methods and tested as the catalysts of hydrolysis of NaBH4. Ni-Co bimetallic nanoparticles with different Ni-Co ratios were synthesized by the modified polyol method via the reduction of in situ precipitated slurries of Ni and Co hydroxides by hydrazine in ethylene glycol solutions. It was found that a Ni- Co nanoparticles with the equal Ni/Co content and mean size of 130 nm are a more active catalyst as compared to Ni75Co25 and Ni25Co75 nanopowders and provide a constant rate of hydrogen evolution up to the full conversion of NaBH4. Zeolite supported Ni- and Co-based nanostructures (Ni-Z and Co-Z) as a convenient in use alternative to the metallic nanoparticles were synthesized via two-stage procedure consisted of adsorption of Ni2+ or Co2+ ions by zeolite from the aqueous solutions followed by the reduction of the adsorbed cations by NaBH4. Using SEM and EDX it was found that such method of synthesis provide the uniform distribution of 50 – 100 nm metallic nanopaticles both on the surface and in the bulk of the carrier due to the high cation-exchange capacity of the aluminosilicates. It was found that Co-Z catalyst is more active compared to Ni-Z and in studied conditions provides the H2 evolution rate close to 1450 mL/min per 1 g of precipitated metal. Various Pt-based nanocomposites were obtained by polyol synthesis and subsequently deposited on the carriers (carbon cloth or cordierite) as well as via a platinum electrodeposition on the titanium crump. It was found that the most efficient catalyst of the hydrolysis of NaBH4 is a cordierite-supported nanodispersed Pt which is able to maintain operation of a 30 W battery of fuel cells for 9-10 hours when using for the hydrolysis 1.1 L of 10 % NaBH4 solution.

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