Abstract
A series of Pt catalysts supported on SO42− group modified Al2O3 were synthesized and tested for methane and propane combustion. The introduction of SO42− group promoted the surface acidity but reduced the quantity of exposed surface Pt atoms due to strong coordination effect. The presence of SO42− group significantly promoted the propane combustion reaction but inhibited the methane combustion reaction. It can be inferred that the promotion on propane combustion is ascribed to the enhanced activation of C–C bond (370.3 kJ mol−1) by sulfates. Whereas the sulfates are not favorable for the activation and cracking of C-H bond (439.3 kJ mol−1), and the reduced number of exposed Pt sites results in the activity decrease of methane combustion.
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This work was supported by the National Natural Science Foundation of China (No. 21872124, 22072137).
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Cen, B., Wang, W., Zhao, P. et al. Revealing the Different Roles of Sulfates on Pt/Al2O3 Catalyst for Methane and Propane Combustion. Catal Lett 152, 863–871 (2022). https://doi.org/10.1007/s10562-021-03675-9
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DOI: https://doi.org/10.1007/s10562-021-03675-9