کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332592 979047 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Degree of order and redox balance in B-site ordered double-perovskite oxides, Sr2MMoO6−δ (M=Mg, Mn, Fe, Co, Ni, Zn)
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Degree of order and redox balance in B-site ordered double-perovskite oxides, Sr2MMoO6−δ (M=Mg, Mn, Fe, Co, Ni, Zn)
چکیده انگلیسی

We have investigated a series of double-perovskite oxides Sr2MMoO6−δ (M=Mg, Mn, Fe, Co, Ni, Zn) for redox stability, oxygen content and crystal structure. Phases with M=Co, Ni and Zn were found to be oxygen-stoichiometric and stable under oxidizing conditions, whereas those with M=Mn and Fe were oxygen-deficient and stable under reducing conditions. The M=Mg phase is stable both under reducing and oxidizing conditions, showing variable oxygen contents within 0.00≤δ≤0.04 depending on the annealing conditions. Structural data indicate somewhat depressed values for the degree of M/Mo cation order and also evidence of electron transfer from MII to MoVI for M=Mn, Fe and Co.

A series of Sr2MMoO6-δ compounds with M=Mg, Mn, Fe, Co, Ni and Zn is investigated for their crystal structure, redox stability and precise oxygen content in order to address systematically the questions concerning the cation (dis)order, oxygen (non)stoichiometry and valence mixing in B-site ordered double-perovskite oxides.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 183, Issue 5, May 2010, Pages 1007–1012
نویسندگان
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