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Cylinder- and cake-like Cr2O3 with a rhombohedral structure were fabricated using the hydrothermal and microemulsion methods, respectively. It is found that surface areas, surface Cr6+ and oxygen adspecies concentrations, and low-temperature reducibility of cake-like Cr2O3 were much higher or better than those of the bulk counterpart. The cake-like Cr2O3 sample showed the best catalytic performance for toluene combustion, giving the T-50% and T-90% of 229 and 240 degrees C at SV = 20,000 mL/(g h), respectively. The excellent catalytic performance of cake-like Cr2O3 was associated with its oxygen adspecies concentration and good low-temperature reducibility. (C) 2013 Elsevier B.V. All rights reserved.
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