کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760193 | 1498042 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimum conditions to prepare high yield, phase pure α-Ni(OH)2 nanoparticles by urea hydrolysis and electrochemical ageing in alkali solutions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optimum conditions to prepare high yield, phase pure α-Ni(OH)2 nanoparticles by urea hydrolysis and electrochemical ageing in alkali solutions Optimum conditions to prepare high yield, phase pure α-Ni(OH)2 nanoparticles by urea hydrolysis and electrochemical ageing in alkali solutions](/preview/png/9760193.png)
چکیده انگلیسی
Phase pure alpha nickel hydroxide (α-Ni(OH)2) is synthesized by a hydrothermal method using urea and nickel nitrate in an autoclave. Optimum conditions to obtain high yield and phase pure α-Ni(OH)2 are identified by varying experimental parameters such as urea concentration, ramp time, and temperature. In a typical experiment, a 94% yield of phase pure α-Ni(OH)2 is successfully prepared. The nickel content, analyzed by means of atomic absorption spectroscopy, is 44% in all samples. The α-Ni(OH)2 nanoparticles are characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The BET surface area and tap density of the nickel hydroxide nanoparticles are also determined. Electrochemical characterization is undertaken via cyclic voltammetry for which the nanoparticles are immobilized on the surface of paraffin impregnated graphite electrodes in 1.0 M alkali solutions. The ageing of the alpha phase occurs within 27 min (30 cycles) of exposure in alkali solutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 150, 4 October 2005, Pages 272-275
Journal: Journal of Power Sources - Volume 150, 4 October 2005, Pages 272-275
نویسندگان
M. Jayalakshmi, N. Venugopal, B. Ramachandra Reddy, M. Mohan Rao,