کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4762810 | 1422947 | 2018 | 10 صفحه PDF | دانلود رایگان |

- 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
Journal: Chemical Engineering Journal - Volume 331, 1 January 2018, Pages 626-635