This work was supported by the National Natural Sci- ence Foundation of China (No.20903002, No.21273211, No.9112T042, and No.21373194) and the Anhui Provin- cial Natural Science Foundation (No.1408085
A series of Mn-doped K-Co-Mo catalysts were prepared by a sol-gel method. The catalyst structure was well characterized by X-ray diffraction, N<sub>2</sub> phys