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 NixZn1−xGa2O4 nanocatalysts at atomic resolution
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Structural and chemical characterization of novel NixZn1−xGa2O4 nanocatalysts at atomic resolution
چکیده انگلیسی
NixZn1−xGa2O4 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, NixZn1−xGa2O4 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 NixZn1−xGa2O4 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 (1 1 1).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 353, 30 October 2015, Pages 419-424
نویسندگان
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