The synthesis of nickel nanoparticles by hydrazine reduction

Wu, Zhi Gang; Muñoz, Marı́a; Montero, Ovidio Almanza

doi:10.1016/j.apt.2009.10.012

Cited by 146 publications

(77 citation statements)

References 28 publications

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“…The different anodes were used as working electrodes, a ca. 15 cm 2 Pt wire as counter and Ag/AgCl nanoparticles show a quasi-spherical morphology and a particle size of about 2 nm, which is in agreement with previous work reporting the preparation of NiNP using NaBH 4 as reducing agent [33,34] In addition, good particle dispersion on the carbon is observed, although a certain, but low degree of agglomeration is also detected. For a comparative study, representative TEM images of PSNi-0.24 and PSNi-6.7…”

Section: Electrooxidation Of Propargyl Alcoholsupporting

confidence: 79%

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Electrocatalytic activity of Ni-doped nanoporous carbons in the electrooxidation of propargyl alcohol

García‐Cruz

Sáez

Ania

et al. 2014

Carbon

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Please cite this article as: García-Cruz, L., Sáez, A., Ania, C.O., Solla-Gullón, J., Thiemann, T., Iniesta, J., Montiel, V., Electrocatalytic activity of Ni-doped nanoporous carbons in the electrooxidation of propargyl alcohol, Carbon (2014), doi: http://dx.doi.org/10.1016/j.carbon. 2014.02.066 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Ni-doped nanoporous carbons provided similar propargyl alcohol conversions for very low metallic contents. Nanoparticulated Ni on various carbon supports gave rise to the highest electrocatalytic activity in terms of product selectivity, with a clear dependence on Ni content. The results point to the importance of controlling the dispersion of the Ni phase within the carbon matrix for a full exploitation of the electroactive area of the metal. Additionally, a change in the mechanism of the propargyl alcohol electrooxidation was noted, which seems to be related to the physicochemical properties of the carbon support as well. Thus, the stereoselectivity of the electrooxidative reaction can be controlled by the active nickel content immobilized on the anode, with a preferential oxidation to (Z)-3-(2-propynoxy)-2-propenoic acid with high Ni-loading, and to propiolic acid with low loading of active Ni sites. Moreover, the formation of (E)-3-(2-propynoxy)-2-propenoic acid was discriminatory irrespective of the experimental conditions and Ni loadings on the carbon matrixes.

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Section: Electrooxidation Of Propargyl Alcoholsupporting

confidence: 79%

“…elsewhere [33,34]. Briefly, an ethanol solution containing NaOH/NaBH 4 was added to an ethanolic solution of NiCl 2 .…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic activity of Ni-doped nanoporous carbons in the electrooxidation of propargyl alcohol

García‐Cruz

Sáez

Ania

et al. 2014

Carbon

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“…ions defines the number of particles and their size as well [16]. A high concentration of Ni 2+ ions together with a fast heating up to 80°C leads to an increased number of formed nuclei [16,14,27]. The initial particle size is decreased, but the particle size measurements detect increased agglomerated particles.…”

Section: Resultsmentioning

confidence: 99%

“…The main reason to keep the temperature below 80°C is the sudden outgassing initiated by the sudden autocatalytic start of the reaction. ions defines the number of particles and their size as well [16]. A high concentration of Ni 2+ ions together with a fast heating up to 80°C leads to an increased number of formed nuclei [16,14,27].…”

Section: Resultsmentioning

confidence: 99%

“…Mainly two types of chemical processes are in use: polyol-process [7][8][9][10] and the reduction with strong reducing compounds like hydrazine [11] or borhydride [12,13]. Chemical reduction is the method of choice for producing nonagglomerated nickel particles due to the possibility to control particle size and morphology by changing reactant and surfactant concentration, pH-value, or temperature [14][15][16][17][18][19][20]. All named processes produce Ni(0) nanoparticles in a batch reactor, but the possibilities for a scale-up to pilot production are very restricted.…”

Section: Introductionmentioning

confidence: 99%

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Continuous-Flow Synthesis of Ni(0) Nanoparticles Using a Cone Channel Nozzle or a Micro Coaxial-Injection Mixer

Schülein¹,

Minrath²,

Pommersheim³

et al. 2014

J Flow Chem

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To synthesize nickel(0) nanoparticles by wet chemical reduction using hydrazine with an average size distribution below 100 nm, two different reactor concepts were developed. With a cone channel nozzle, the reactant solutions were sprayed into a batch for further processing and reduction at elevated temperatures. Another concept uses a microcoaxial injection mixer connected to a heated tube to establish a fully continuously operating reactor. To shorten the time for reduction of the nickel, salt temperatures up to 180°C are applied. To avoid uncontrolled residence time, the whole system was pressurized up to 80 bar. Approximately 80 L reactant solution, i.e., 1 kg nickel(0) nanoparticles, could be processed within 30 h.

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Green Synthesis and Applications of Magnetic Nanoparticles

Rossi

Parize

Rubim

2012

Handbook of Green Chemistry

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The sections in this article are Introduction Green Synthesis of Magnetic Nanoparticles Background Thermal Decomposition Methods Microemulsion Methods Preparation of Magnetic NPs Using Renewable Resources Synthesis of Magnetic NPs in Ionic Liquids Other Methods Magnetic Separation as a Green Separation Tool Background Oil Spill Containment and Recovery Heavy Metal Recovery Catalyst Recovery and Recycling Metal Complex Catalysts Metal Nanoparticle Catalysts Organocatalysts Conclusion

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The synthesis of nickel nanoparticles by hydrazine reduction

Cited by 146 publications

References 28 publications

Electrocatalytic activity of Ni-doped nanoporous carbons in the electrooxidation of propargyl alcohol

Electrocatalytic activity of Ni-doped nanoporous carbons in the electrooxidation of propargyl alcohol

Continuous-Flow Synthesis of Ni(0) Nanoparticles Using a Cone Channel Nozzle or a Micro Coaxial-Injection Mixer

Green Synthesis and Applications of Magnetic Nanoparticles

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