Synthesis of Longtime Water/Air-Stable Ni Nanoparticles and Their High Catalytic Activity for Hydrolysis of Ammonia−Borane for Hydrogen Generation

Yan, Jun‐Min; Zhang, Xinbo; Han, Song; Shioyama, Hiroshi; Xu, Qiang

doi:10.1021/ic900921m

Cited by 186 publications

(70 citation statements)

References 57 publications

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“…[58] In addition, the amorphous Co, Ni, and Fe-Ni alloy NPs also exhibit much better catalytic activity than their crystalline counterparts. [61][62][63] The generation of hydrogen from aqueous AB catalyzed by nonnoble metals is summarized in Table 1.…”

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Liquid‐Phase Chemical Hydrogen Storage: Catalytic Hydrogen Generation under Ambient Conditions

et al. 2010

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There is a demand for a sufficient and sustainable energy supply. Hence, the search for applicable hydrogen storage materials is extremely important owing to the diversified merits of hydrogen energy. Lithium and sodium borohydride, ammonia borane, hydrazine, and formic acid have been extensively investigated as promising hydrogen storage materials based on their relatively high hydrogen content. Significant advances, such as hydrogen generation temperatures and reaction kinetics, have been made in the catalytic hydrolysis of aqueous lithium and sodium borohydride and ammonia borane as well as in the catalytic decomposition of hydrous hydrazine and formic acid. In this Minireview we briefly survey the research progresses in catalytic hydrogen generation from these liquid-phase chemical hydrogen storage materials.

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“…[70] The authors also [58] [58] amorphous 60 3 8 0.12 Fe [58] crystalline < 100 ca. 3 160 0.12 Ni in starch [61] amorphous < 10 3 6 0.1 Co [63] amorphous Ni/SiO 2 nanospheres [59] amorphous no data 2.0 76 0.05 Ni/SiO 2 [59] amorphous no data 1.9 120 0.05 Ni@SiO 2 nanospheres [66] no data very small 2.7 23 0.065…”

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Liquid‐Phase Chemical Hydrogen Storage: Catalytic Hydrogen Generation under Ambient Conditions

et al. 2010

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“…The rate of hydrogen generated from ArgÀNiGs catalysts was based on the concentration of NiGs nanoparticles, without considering the weight of arginine. The activation energy for NiGs and ArgÀNiGs catalysed AB hydrolysis was determined from the slope of the Arrhenius plot at varying temperature (25,35,45 ) and AB (200 mmol L À1 ), respectively, to evaluate the effect of AB concentration and catalyst amount on catalytic dehydrogenation of AB.…”

Section: Kinetic Study Of Hydrolytic Dehydrogenation Of Ab By Argànigsmentioning

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Applications of L-arginine functionalised green synthesised nickel nanoparticles as gene transfer vector and catalyst

Pandian

Rameshthangam

2016

Journal of Experimental Nanoscience

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Green synthesised nickel nanoparticles (NiGs) using Ocimum sanctum leaf extract have been stabilised with L-arginine (ArgÀNiGs) and used as gene transfer vector for bacterial transformation and as catalyst for hydrolytic dehydrogenation. Effective binding of L-arginine with NiGs was confirmed by characterisation of ArgÀNiGs. L-arginine coating on NiGs prevented the agglomeration of NiGs and reduced the size of the nanoparticles. Synthesised ArgÀNiGs was conjugated with green fluorescent protein (GFP) inserted pUC 18 (pDNAÀArgÀNiGs) and employed for transforming non-competent Escherichia coli DH5 a. Transformation efficiency of pDNAÀArgÀNiGs was found to be higher (3.8 £ 10 6 mg À1 DNA) than the CaCl 2 -mediated method (2.9 £ 10 5 mg À1 DNA). Fluorescence micrograph of transformants showed enhanced uptake and transformation of pDNAÀArgÀNiGs by bacterial cells. Electrophoretic analysis of expressed GFP confirmed that pDNA could retain its functional activity even after binding with ArgÀNiGs. This biocompatible, efficient and economical method could be exploited for transforming non-competent bacterial cells. ArgÀNiGs catalysed hydrolytic dehydrogenation of ammonia borane (AB) generated 198 mL of hydrogen in 8 min with 128 mg AB and 10 mL of catalyst at 35 C. The hydrogen generation rate of ArgÀNiGs catalysed AB dehydrogenation was determined to be 24.8 mol H 2 min À1 with activation energy (E a ) of 34.05 kJ mol À1 and turnover frequency (TOF) of 12.30 mol H 2 (mol Ni) À1 min À1. ArgÀNiGs retained 89% of its initial catalytic activity even after 10 recycles, indicating its high durability in catalytic reactions. Kinetic studies of AB dehydrogenation by ArgÀNiGs show the first-order kinetics with respect to catalyst concentration and zero-order kinetics with respect to AB concentration. This efficient and durable catalyst could be applied in hydrolytic dehydrogenation of AB for effective hydrogen storage.

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“…The reaction is called ''self-hydrolysis'' and results in a spontaneous release of hydrogen from sodium borohydride. In the presence of a catalyst and a strongly alkaline media, the hydrolysis reaction is significantly enhanced and pure hydrogen is produced with a nearly stoichiometric amount (see for example [33,34] and references herein). Fig.…”

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confidence: 99%

Kinetics at the nanoscale: formation and aqueous oxidation of copper nanoparticles

Alsawafta

Bădilescu

Packirisamy

et al. 2011

Reac Kinet Mech Cat

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A simple method to prepare copper nanoparticles under the ambient atmosphere, in an aqueous environment, is developed utilizing solid sodium borohydride as the reducing agent and sodium citrate as a stabilizer and complexing agent. This constitutes a model system having a stability of several hours, sufficient to allow kinetic measurements. The localized surface plasmon resonance band of copper nanoparticles in the UV-Vis spectrum is used to determine the rate of formation of copper nanoparticles and assess the beginning of the oxidation process. The effect of temperature, copper sulfate and sodium borohydride concentrations on the copper nanoparticle formation rate is investigated. It is found that the kinetic data obey a first order rate law with respect to both sodium borohydride and copper sulfate. Based on the kinetic data, a novel mechanism of the reduction reaction is envisaged, involving three possible pathways. As solid sodium borohydride is an important hydrogen storage material, the results of this work are relevant to the field of portable fuel cells. The optical properties of copper nanoparticles have been simulated by using the Discrete Dipole Approximation method and the Mie theory and a good agreement was found between the theoretical and experimental characteristics of the copper plasmon band. The data obtained in this work provide valuable information on the kinetics of reactions at the nanoscale.

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Synthesis of Longtime Water/Air-Stable Ni Nanoparticles and Their High Catalytic Activity for Hydrolysis of Ammonia−Borane for Hydrogen Generation

Cited by 186 publications

References 57 publications

Liquid‐Phase Chemical Hydrogen Storage: Catalytic Hydrogen Generation under Ambient Conditions

Liquid‐Phase Chemical Hydrogen Storage: Catalytic Hydrogen Generation under Ambient Conditions

Applications of L-arginine functionalised green synthesised nickel nanoparticles as gene transfer vector and catalyst

Kinetics at the nanoscale: formation and aqueous oxidation of copper nanoparticles

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