Title of article :
Catalytic activity of spinel oxides MgCr2O4 and CoCr2O4 for methane combustion
Author/Authors :
Hu، نويسنده , , Jianan and Zhao، نويسنده , , Wenyan and Hu، نويسنده , , Ruisheng and Chang، نويسنده , , Guiying and Li، نويسنده , , Chun and Wang، نويسنده , , Lingjie، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
6
From page :
268
To page :
273
Abstract :
The chrome-containing spinels, MgCr2O4 and CoCr2O4, were prepared via sol–gel method using glucose as a complexing agent after calcination at 1400 °C and investigated as catalysts for catalytic combustion of methane. XRD indicated that single phase spinel oxides of MgCr2O4 and CoCr2O4 had formed. XPS analysis exhibited that Cr3+ was present in both catalysts, whereas a small amount of Cr6+ was only detected in MgCr2O4. The spinel MgCr2O4 proved to be very active and its catalytic activity reached T10 = 400 °C and T90 = 684 °C for methane combustion, which was much superior to that of CoCr2O4 (T10 = 480 °C and T90 = 750 °C). Larger surface area (1.1 m2/g), more flexible reactive surface oxygen species, and appropriate surface and bulk structure of MgCr2O4 may contribute to its excellent catalytic activity toward methane combustion.
Keywords :
A. Composites , B. Sol–gel chemistry , C. X-ray diffraction , D. Catalytic properties
Journal title :
Materials Research Bulletin
Serial Year :
2014
Journal title :
Materials Research Bulletin
Record number :
2105440
Link To Document :
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