کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4762810 1422947 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced catalytic performance by oxygen vacancy and active interface originated from facile reduction of OMS-2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced catalytic performance by oxygen vacancy and active interface originated from facile reduction of OMS-2
چکیده انگلیسی


- A facile reduction strategy was applied to enhance the catalytic activity of OMS-2.
- The reduction treatment on OMS-2 produced larger amount of oxygen vacancies.
- The reduction treatment on OMS-2 produced active heterogeneous interface.
- The oxygen vacancy and active interface were favorable for the catalytic activity.
- The OMS-2 catalysts displayed excellent combustion activity for dimethyl ether.

Manganese oxide octahedral molecular sieves (OMS-2) is a kind of excellent redox catalysts, a key challenge still remains to further increase their catalytic performance. Herein, we report a facile reduction method to enhance the catalytic activity of OMS-2 by producing more oxygen vacancy and creating an active interface between the main phase MnO2 and the minor phase Mn3O4. Compared to the pristine OMS-2, the OMS-2 catalyst reduced in a relatively short time exhibits superior performance for dimethyl ether combustion with a starting-off temperature of 163 °C and a complete combustion temperature of 230 °C. Such enhanced activity can be ascribed to the higher reducibility, the more oxygen vacancy, and the active heterogeneous interface. These findings open up a new way to design highly efficient catalysts, especially the metal oxides-based catalysts, for redox reactions.

We report a facile NaBH4 reduction method to enhance the catalytic activity of OMS-2. The moderate reduction treatment can create oxygen vacancies and active interface on the OMS-2 structure. The reduced OMS-2 exhibit substantially enhanced catalytic combustion performance for dimethyl ether.259

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 331, 1 January 2018, Pages 626-635
نویسندگان
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