کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
65268 48387 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Benzaldehyde reduction over Cu–Al–O bimetallic oxide catalyst. Influence of pH during hydrothermal synthesis on the structural and catalytic properties
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Benzaldehyde reduction over Cu–Al–O bimetallic oxide catalyst. Influence of pH during hydrothermal synthesis on the structural and catalytic properties
چکیده انگلیسی


• Cu–Al–O bimetallic oxide was prepared by varying the pH during synthesis.
• The catalytic performance of Cu–Al–O in the reduction of benzaldehyde is studied.
• The basic pH value during preparation has a strong influence on the system activity.
• A high pH enhances both the reducibility of Cu2+ and the dispersion of Cu species.

The Cu–Al–O bimetallic oxide was prepared by varying the pH during synthesis. The samples were characterized by several techniques (BET, TGA, XRD, LRS, EDX and XPS). Their behavior during reduction by hydrogen was examined by in situ X-ray diffraction and by X-ray photoelectron spectroscopy. The catalysts were studied in the reduction of benzaldehyde in the 150–200 °C temperature range. The choice of pH value of the material preparation influenced strongly the textural and structural properties of the bimetallic system, as well as their reactivity. When the catalyst was prepared in highly basic medium (pH = 12), benzyl alcohol was obtained with high selectivity (96%) and at high conversion (78%), while toluene was the only product observed when preparation was carried out at pH = 8. The marked divergence in behavior from the two systems may be accounted for by their acid–base and reducibility properties, dispersion and environment of copper.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 396, January 2015, Pages 207–215
نویسندگان
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