Please use this identifier to cite or link to this item: https://localhost/jspui/handle/123456789/687
Title: Oxidation kinetics of nickel nano crystallites obtained by controlled thermolysis of diaquabis(ethylenediamine)nickel(II) nitrate
Authors: K K M, Yusuff
Ponminiessary P, Robinson
Chenampilly Ummer, Aniz
Sebastian, Manju
Vasudevan, Arun
Keywords: Ethylenediamine
Oxidation kinetics
Thermolysis
Nano nickel
Issue Date: 8-Jul-2009
Publisher: Springer
Citation: Robinson, P.P., Arun, V., Manju, S. et al. Oxidation kinetics of nickel nano crystallites obtained by controlled thermolysis of diaquabis(ethylenediamine)nickel(II) nitrate. J Therm Anal Calorim 100, 733–740 (2010).
Abstract: The metal complex, [Ni(en)2(H2O)2](NO3)2 (en = ethylenediamine), was decomposed in a static furnace at 200 °C by autogenous decomposition to obtain phase pure metallic nickel nanocrystallites. The nickel metal thus obtained was studied by XRD, IR spectra, SEM and CHN analysis. The nickel crystallites are in the nanometer range as indicated by XRD studies. The IR spectral studies and CHN analyses show that the surface is covered with a nitrogen containing species. Thermogravimetric mass gain shows that the product purity is high (93%). The formed nickel is stable and resistant to oxidation up to 350 °C probably due to the coverage of nitrogen containing species. Activation energy for the oxidation of the prepared nickel nanocrystallites was determined by non-isothermal methods and was found to depend on the conversion ratio. The oxidation kinetics of the nickel crystallites obeyed a Johnson–Mehl–Avrami mechanism probably due to the special morphology and crystallite strain present on the metal.
URI: http://localhost:8080/xmlui/handle/123456789/687
Appears in Collections:5. Chemistry Research Publications

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