2014
DOI: 10.1155/2014/193162
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Synthesis of Nickel and Nickel Hydroxide Nanopowders by Simplified Chemical Reduction

Abstract: Nickel nanopowders were synthesized by a chemical reduction of nickel ions with hydrazine hydrate at pH ∼12.5. Sonication of the solutions created a temperature of 54-65 ∘ C to activate the reduction reaction of nickel nanoparticles. The solution pH affected the composition of the resulting nanoparticles. Nickel hydroxide nanoparticles were formed from an alkaline solution (pH∼10) of nickel-hydrazine complexed by dropwise titration. X-ray diffraction of the powder and the analysis of the resulting Williamson-H… Show more

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Cited by 123 publications
(49 citation statements)
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“…The apparent onset potential for OER is also only slightly decreasing from 1.55 and 1.53 to 1.52 V when measuring one, three and five half‐layer Hi−Ni electrodes, for the same reasons as mentioned above (Figure b and Table ). To further evaluate the performance of these electrodes we estimate the driving force necessary to achieve a current density of 10 and 100 mA cm −2 , which are values comparable to what is used in solar to fuel conversion systems . Generally, flat Ni requires an operating potential of 1.63 V, or more than 1.80 V to obtain a current density of 10 mA cm −2 and 100 mA cm −2 , respectively.…”
Section: Resultsmentioning
confidence: 99%
“…The apparent onset potential for OER is also only slightly decreasing from 1.55 and 1.53 to 1.52 V when measuring one, three and five half‐layer Hi−Ni electrodes, for the same reasons as mentioned above (Figure b and Table ). To further evaluate the performance of these electrodes we estimate the driving force necessary to achieve a current density of 10 and 100 mA cm −2 , which are values comparable to what is used in solar to fuel conversion systems . Generally, flat Ni requires an operating potential of 1.63 V, or more than 1.80 V to obtain a current density of 10 mA cm −2 and 100 mA cm −2 , respectively.…”
Section: Resultsmentioning
confidence: 99%
“…Category III spatter primarily consists of droplet spatter with its surface covered by agglomerated powder. The evidence clearly shows powder oxidation strongly affects powder agglomeration, pore formation, and pore stabilisation[68].…”
mentioning
confidence: 99%
“…The existence of (220), (311), (400), (422), (511), and (440) planes in the patterns assures crystallization of a pure cubic phase [9,10]. Fig.2 shows the XRD pattern of a pure nickel metal characterized by the three peaks with hkl identified as (111), (200) and (220) indicating that the resulting powders are face-centered cubic (fcc) nickel [11]. Fig.3 shows the SEM micrograph of the ferrite sample.…”
Section: Methodsmentioning
confidence: 99%