Evolution of MoTeOx/SiO2 and MoBiTeOx/SiO2 catalysts in the partial oxidation of propane to acrolein |
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| Authors: | Yiming He |
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| Institution: | a College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Jinhua 321004, China
b Institute of Physical Chemistry, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University, Jinhua 321004, China |
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| Abstract: | A thorough investigation of the catalysts Mo1Te1Ox/SiO2 and Mo1Bi0.05Te1Ox/SiO2 in the partial oxidation of propane is presented in this paper, in order to elucidate the nature and behavior of the active surface. The catalysts’ structures and redox properties were investigated by means of X-ray powder diffraction, Raman spectroscopy, in situ Raman spectroscopy, X-ray photoelectron spectroscopy, and H2-TPR techniques. The results indicate that Te-polymolybdate is the main active phase on fresh catalysts. During reaction, the catalysts underwent a progressive reduction, resulting in the reconstruction of the active surface and the formation of a MoO3 phase. The synergistic effect between Te-polymolybdate and MoO3 was assumed to promote catalytic performance. The different stabilities of Mo1Te1Ox/SiO2 and Mo1Bi0.05Te1Ox/SiO2 catalysts are also discussed. |
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| Keywords: | Propane Te-polymolybdate Volatilization Reconstruction |
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