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Li, Chengbin,Oh, Hwa-Yong,Cho, Hye-Jin,Kumarsrininasan, Sivaranjani,Choi, Jong-Ha,Li, Zhenghua,Hong, Gyoung-Hee,Park, Su-Bin,Kim, Ji Man American Scientific Publishers 2016 Journal of nanoscience and nanotechnology Vol.16 No.11
<P>Binary oxide catalyst (Cu0.15Co2.84O4) supported on mesoporous CeO2 has been prepared by an incipient wetness impregnation method. The produced catalysts with different loading of binary oxide (0-30 wt%) have been thoroughly characterized and applied for a water-gas shift (WGS) reaction. The characterization results indicate that the binary oxide catalysts are highly dispersed on the mesoporous CeO2 support without significant loss of mesostructural properties, even though the catalyst loading reaches 30 wt%. The highest catalytic activity towards WGS reaction has been achieved from the 30 wt% Cu0.15Co2.84O4/CeO2 catalyst, showing 100% CO conversion and very low methane yield (nearly zero%) at relatively low temperature (similar to 300 degrees C). The present Cu0.15Co2.84O4/CeO2 catalyst can be recycled more than three times with loss of the activity. Metallic cobalt species are formed during the reaction, whose structural properties are maintained under the repeated WGS reaction conditions. Excellent catalytic activity and durability originate from the highly dispersed binary oxides on the pore surface of mesoporous CeO2, which is probably due to the strong metal-support interaction.</P>