کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781745 | 1511636 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of iron counter-ion environment in bulk and supported phosphomolybdic acid based catalysts
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterization of iron counter-ion environment in bulk and supported phosphomolybdic acid based catalysts Characterization of iron counter-ion environment in bulk and supported phosphomolybdic acid based catalysts](/preview/png/9781745.png)
چکیده انگلیسی
Extended X-ray absorption fine structure (EXAFS) was used to characterize the environment of iron counter-cations in Keggin type phosphomolybdic compounds used as catalysts for oxidation reactions. Iron doped compounds corresponding to bulk acid and to acid supported on the cesium salt were prepared and studied. Iron formed hexa-hydrated complex of both Fe3+ and Fe2+ in the bulk acid, whereas it was present as Fe(OH)2+ hydroxy-cations in the acid supported on the cesium salt. Upon heating the hexa-hydrated complex lost one molecule of water to bind to the Keggin anion through a terminal oxygen. (Fe-O-Mo bond). The environment of the iron hydroxy-cation changed upon heating while its closer coordination append to remained unchanged.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 5, May 2005, Pages 887-894
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 5, May 2005, Pages 887-894
نویسندگان
Q. Huynh, J.M.M. Millet,