کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5356580 | 1503611 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and chemical characterization of novel NixZn1âxGa2O4 nanocatalysts at atomic resolution
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
NixZn1âxGa2O4 has already been demonstrated as a noteworthy example of potentially useful catalytic properties such as NOx reduction. In our previous work, it was interesting to find out that the operating temperature of NiGa2O4 catalyst in NOx reduction can be tuned by simple chemical substitution of Ni2+ by Zn2+. It is believed that the mechanism behind such stoichiometry-dependence on operating temperature should be strongly correlated with microstructure, surface morphology as well as the local composition of the nanocatalysts. In the present investigation, NixZn1âxGa2O4 solid solution was synthesized via a hydrothermal ion-exchange reaction, using NaGaO2 and the corresponding acetic salts as the starting materials. By means of a state-of-the-art aberration corrected STEM and high resolution TEM, the structural and chemical characterization at the atomic scale on the NixZn1âxGa2O4 nanocatalyst was carried out, including the crystal structure, size, morphology, surface structure and local composition. It is found that the catalyst was solid solution and most possible exposed facets may be (1Â 1Â 1).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 353, 30 October 2015, Pages 419-424
Journal: Applied Surface Science - Volume 353, 30 October 2015, Pages 419-424
نویسندگان
Qian Xu, Zhaochun Wu, Jinhua Hong, Xiaofeng Chang, Xueji Li, Shicheng Yan, Peng Wang,