کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
60482 47534 2016 11 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Zinc influence on the formation and properties of Pt/Mg(Zn)AlOx catalysts synthesized from layered hydroxides
ترجمه فارسی عنوان
تاثیر فلز روی بر شکل گیری و خواص کاتالیزور Pt/Mg(Zn)AlOx سنتز شده از هیدروکسیدهای لایه بندی شده
کلمات کلیدی
هیدروکسیدهای دوگانه لایه لایه حاوی روی ؛ کاتالیزور پلاتین؛ هیدروژن زدایی پروپان. XPS؛ EXAFS
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Zinc containing layered double hydroxides (LDH) synthesis.
• Propane dehydrogenation on the platinum catalysts based on Mg(Zn)Al-LDH.
• Electronic state of platinum in the Pt/Mg(Zn)AlOx catalysts.

Layered double hydroxides (LDH) containing Al3+, Mg2+ and Zn2+ cations with the ratios of Zn/(Mg + Zn) = 0, 0.05, 0.1, 0.2, 0.5, 0.7, and 1.0 were synthesized. The effect of zinc content on the phase composition of LDH and on the structural parameters, textural characteristics and acid–base properties of the corresponding mixed oxides were studied. This type of supports was used to obtain the non-acid platinum Pt/Mg(Zn)AlOx catalysts. The formation of supported platinum particles, their composition, dispersion and electronic state were examined by means of TPR, TEM, XPS, and EXAFS. The possibility to obtain the bimetallic PtZn particles, whose structure and strength of interaction with the support depend on the zinc content of the support, was demonstrated. It was found that the presence of zinc atoms in the platinum environment decreases the particle size of active metal and stabilizes platinum in the active metallic state ensuring a high activity of the catalyst in dehydrogenation of propane with the selectivity for propylene above 99%.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 341, September 2016, Pages 13–23
نویسندگان
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