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Abstract
Three-dimensional (3D) ordered mesoporous cubic Co 3 O 4 (denoted as Co-KIT6 and Co-SBA16) were fabricated adopting the KIT-6- and SBA-16-templating strategies, respectively. It is shown that Co-KIT6 and Co-SBA16 possessed large surface areas (118–121 m 2 /g), high oxygen adspecies concentrations, and good low-temperature reducibility. Over Co-KIT6 at space velocity = 20,000 mL/(g h), 90% toluene and methanol conversions were achieved at 180 and 139 °C, respectively. The excellent catalytic performance of Co-KIT6 and Co-SBA16 was associated with their larger surface areas, higher oxygen adspecies concentrations, better low-temperature reducibility, and 3D ordered mesoporous structure. High-surface-area 3D ordered mesoporous Co 3 O 4 (denoted as Co-KIT6 and Co-SBA16) can be fabricated with the KIT-6 and SBA-16-templating strategies, respectively. The Co-KIT6 and Co-SBA16 catalysts possess large surface areas, high oxygen adspecies concentrations, good low-temperature reducibility, and 3D ordered mesoporous structures, which are responsible for their excellent performance for toluene and methanol oxidation. ► Vacuum treatment favors the formation of 3D ordered mesoporous structure. ► 3D ordered mesoporous structure possesses high surface area. ► 3D ordered mesoporous structure exhibits good low-temperature reducibility. ► Mesoporous structure, reducibility, and oxygen species determine catalytic activity.
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