کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1492182 | 1510728 | 2005 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Kinetics of gas phase reduction of nickel chloride in preparation for nickel nanoparticles Kinetics of gas phase reduction of nickel chloride in preparation for nickel nanoparticles](/preview/png/1492182.png)
We investigated the chemical kinetics of NiCl2 reduction to apply to the synthesis of nickel nanoparticles in a tubular furnace reactor. The conversion of NiCl2 increased monotonically with reaction temperature up to 99% at 950 °C, and in turn, the rate constant of the reaction increased from 78 to 286 with an increase in the temperature from 800 to 950 °C. The reaction rate was estimated to be the first order with respect to chloride concentration, and the rate constant obeyed the Arrhenius law, of which the activation energy and pre-exponential factor were 103.79 kJ/mol and 7.34 × 106 min−1, respectively. Taking advantage of the kinetics, we synthesized crystalline nickel nanoparticles with average primary particle size ranging from 31 to 106 nm by systematically controlling the reactor temperature and chloride concentration.
Journal: Materials Research Bulletin - Volume 40, Issue 12, 8 December 2005, Pages 2100–2109