Metal-organic framework derived hexagonal layered cobalt oxides with {1 1 2} facets and rich oxygen vacancies: High efficiency catalysts for total oxidation of propane |
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Affiliation: | 1. School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China;2. School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China;3. Key Laboratory of Beijing on Regional Air Pollution Control, Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing 100124, China |
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Abstract: | A cobalt-based metal–organic framework was used as a precursor to synthesize Co3O4 catalysts exhibiting a hexagonal layered morphology by calcination at varying temperatures. Various characterization techniques, such as XRD, SEM, Raman, H2-TPR, O2-TPD and N2 adsorption–desorption, were used to study the effects of calcination temperature on the grain size, surface area, and pore volume of the catalysts. The Co3O4 catalyst obtained by calcination at 350 °C (Co3O4-350) exhibited the highest catalytic activity for the total oxidation of propane. Furthermore, the small grain size and layered structure of Co3O4-350 allowed it to possess a high specific surface area, a highly exposed {1 1 2} facets, and abundant oxygen defects that facilitated a favorable low-temperature reducibility and oxygen mobility, thereby improving catalytic activity. This research offers a simple strategy for synthesis of Co3O4 with layered structure, highly exposed {1 1 2} facets and rich oxygen defects. |
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Keywords: | Metal organic frameworks Oxygen vacancy Catalytic propane oxidation MOFs" },{" #name" :" keyword" ," $" :{" id" :" k0035" }," $$" :[{" #name" :" text" ," _" :" Metal-organic frameworks VOCs" },{" #name" :" keyword" ," $" :{" id" :" k0045" }," $$" :[{" #name" :" text" ," _" :" Volatile organic compounds WHSV" },{" #name" :" keyword" ," $" :{" id" :" k0055" }," $$" :[{" #name" :" text" ," _" :" weight hourly space velocity DSC" },{" #name" :" keyword" ," $" :{" id" :" k0065" }," $$" :[{" #name" :" text" ," _" :" differential scanning calorimetry DMF" },{" #name" :" keyword" ," $" :{" id" :" k0075" }," $$" :[{" #name" :" text" ," _" :" dimethylformamide SAED" },{" #name" :" keyword" ," $" :{" id" :" k0085" }," $$" :[{" #name" :" text" ," _" :" selected area electron diffraction BTC" },{" #name" :" keyword" ," $" :{" id" :" k0095" }," $$" :[{" #name" :" text" ," _" :" trimesic acid |
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