Hydrogen generation from deliquescence of ammonia borane using Ni–Co/r-GO catalyst

Chou, Chau-Chang; Chen, Bing‐Hung

doi:10.1016/j.jpowsour.2015.05.091

Cited by 16 publications

(3 citation statements)

References 26 publications

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“…Owing to higher hydrogen content and stability under natural conditions, therefore, chemical hydrides (such as KBH 4 , NaBH 4 , , NH 3 BH 3 identified as AB, and CH 3 NH 2 BH 3 ) as available hydrogen sources have received more attention. Among these chemical hydrides, NaBH 4 was widely used as a hydrogen source in the early stage because of its high content of hydrogen (10.7 wt %), high stability, nontoxic nature, and fire resistance. − Also, AB has been regarded as the more attractive hydrogen source due to its high hydrogen capacity, nontoxic nature, and superior stability − in aqueous solution. Commonly, hydrogen gas can be liberated from AB via thermolysis and hydrolysis.…”

Section: Introductionmentioning

confidence: 99%

In Situ Hydrogen Activation Inspiring Efficient One-Pot Hydrogenation of Halogenated Nitrobenzenes over Ni–Co-Based Composites

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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Selective hydrogenation of halogenated nitrobenzenes (XNBs) to halogenated amines (XANs) is of great importance for practical applications. Non-noble metal-based catalysts have shown prominent advantages in price and reserves accompanying low activity and selectivity toward the hydrogenation of halogenated nitrobenzenes (XNBs) even under harsh conditions. In this work, inexpensive Ni−Co-based composites (N x CC) were prepared for in situ tandem hydrogenation of XNBs to XANs by using hydrogen released from ammonia borane (AB) hydrolysis under ambient pressure. The results show these N x CC samples exhibited superior catalytic performance against Co 3 O 4 or NiO samples. A selected N 0.2 CC catalyst as the mainly screened one can quantitatively convert XNBs to XANs with unprecedented activity with 100% XAN conversion. This catalyst can completely convert m-chloronitrobenzene (m-CNB) to m-chloroaniline (m-CAN), suggesting N 0.2 CC efficiently suppresses the further dichlorination of m-CAN. Recycling test shows the N 0.2 CC possesses higher stability and recyclability. The N 0.2 CC catalyst was found to be a dual catalyst that synergistically catalyzes both the AB dehydrogenation (about 1735 mL min −1 g −1 of hydrogen generation rate) and the subsequent hydrogenation (almost 100% conversion) of XNBs. Notably, it is the first time that the rapid in situ hydrogen activation (IHA) which facilely arouses the efficient hydrogenation of adsorbed substrate on the surface of catalyst has been elaborated. From a unique perspective, distinctive and simple control experiments were innovatively designed for testifying the advantage of tandem hydrogenation in contrast with traditional hydrogenation. This work presents an efficient and environmental strategy to selectively produce XANs from XNBs using highperformance non-noble metal composites.

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Section: Introductionmentioning

confidence: 99%

In Situ Hydrogen Activation Inspiring Efficient One-Pot Hydrogenation of Halogenated Nitrobenzenes over Ni–Co-Based Composites

Zhang

et al. 2021

Ind. Eng. Chem. Res.

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“…Amongst these, the noble-metal catalysts, such as palladium(0) [10], ruthenium(0) [9,11] and rhodium(0) nanoparticles [9,12], have been identified as highly active for the process. However, because of their high costs, less expensive optionsespecially from the first row transition metal grouphave led to the consideration of non-noble metal catalysts such as Nickel (Ni), Iron (Fe) and Cobalt (Co) [13,14,15,16,[17][18][19][20], either singly or in combination with a noble-metal catalyst. Sun et al [21] used 7 nm CoPd nanoparticles on carbon support with catalyst composition Co 48 Pd 52 showing the highest activity.…”

Section: Introductionmentioning

confidence: 99%

Activity of varying compositions of Co–Ni–P catalysts for the methanolysis of ammonia borane

Amoo

Onyeozili

Kalu

et al. 2016

International Journal of Hydrogen Energy

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Various compositions of Co-NiP catalysts supported on a palladium-activated Al 2 O 3 (Pd-Al 2 O 3) substrate were synthesized, characterized and investigated for catalytic methanolysis of ammonia-borane (AB, H 3 NBH 3). The Co-Ni-P/Pd-Al 2 O 3 catalysts were synthesized by polymer-stabilized Pd nanoparticlecatalyzation and activation of the Al 2 O 3 substrate support and the electroless deposition of cobalt-nickel (Co-Ni) metal particles on the surface of the Al 2 O 3 support for a plating time of 30 minutes. The Co-Ni-P/Pd-Al 2 O 3 catalysts are stable enough to be isolated as solid materials and characterized by X-ray Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDS) and Scanning Electron Microscopy (SEM). At 40 0.5°C, the isolable, re-dispersible and reusable catalysts were found active in the methanolytic dehydrogenation of ammonia-borane retaining up to 65 % of its initial activity after five cycles. Rates of hydrogen evolution were used to determine the kinetics of methanolysis reaction. The ranges of examined catalyst particle amounts, AB concentrations and temperatures were 15.75-63 mg, 50-200 mM, and 30-55 °C, respectively. Hydrogen desorption was identified as the rate controlling step in the methanolysis reaction and using the data, the kinetic rate constant (), the hydrogen desorption equilibrium constant (), and the overall equilibrium constant () parameters in a Langmuir-Hinshelwood rate expression were determined to be 1.4 mol/g-cat. s, 1.5918 L/mol and 1.5986 L/mol, respectively. Activation parameters such as enthalpy of activation (∆H), entropy of activation (∆S), and activation energy (E a) that were obtained by Eyring and Arrhenius equations are reported for the various catalyst ratios.

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“…However, limited resources and high cost hinder their widespread application, so considerable effort has been devoted to the exploration of efficient alternatives based on non-noble transition metals. For example, Co-B, Cu-Co, and Ni-Co nanoparticles were reported as active catalysts for AB hydrolysis [9][10][11][12][13][14]. However, metal nanoparticles easily aggregate due to their high surface energy, which reduces their surface area and the number of accessible active sites available for catalytic reactions [15].…”

Section: Introductionmentioning

confidence: 99%

Cobalt-Nickel-Boron Supported over Polypyrrole-Derived Activated Carbon for Hydrolysis of Ammonia Borane

Zou

Gao

Xiang

et al. 2016

Metals

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Abstract:In this study, polypyrrole (PPy) nanofibers were used to synthesize a super-activated carbon material. A highly-dispersed Co-Ni-B catalyst was supported on PPy nanofiber-derived activated carbon (PAC) by chemical reduction. The Co-Ni-B/PAC hybrid catalyst exhibited excellent catalytic performance for the decomposition of ammonia borane (AB) in an aqueous alkaline solution at room temperature. The size of the metal particles, morphology of Co-Ni-B/PAC, and catalytic activity of the supported catalyst were investigated. Ni-B, Co-B, and Co-Ni-B catalysts were also synthesized in the absence of PAC under similar conditions for comparison. The maximum hydrogen generation rate (1451.2 mL´1¨min´1¨g´1 at 25˝C) was obtained with Co-Ni-B/PAC. Kinetic studies indicated that the hydrolysis reaction of AB was first order with respect to Co-Ni-B/PAC, and the activation energy was 30.2 kJ¨mol´1. Even after ten recycling experiments, the catalyst showed good stability owing to the synergistic effect of Co-Ni-B and PAC.

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Hydrogen generation from deliquescence of ammonia borane using Ni–Co/r-GO catalyst

Cited by 16 publications

References 26 publications

In Situ Hydrogen Activation Inspiring Efficient One-Pot Hydrogenation of Halogenated Nitrobenzenes over Ni–Co-Based Composites

In Situ Hydrogen Activation Inspiring Efficient One-Pot Hydrogenation of Halogenated Nitrobenzenes over Ni–Co-Based Composites

Activity of varying compositions of Co–Ni–P catalysts for the methanolysis of ammonia borane

Cobalt-Nickel-Boron Supported over Polypyrrole-Derived Activated Carbon for Hydrolysis of Ammonia Borane

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