Abstract
VOx/TiO2 catalysts were prepared by wetness of TiO2 with anatase and rutile structures and tested in the catalytic combustion of CB, DCB, DCM and TCE. The characterization by XRD, TPR and XPS shows that VOx catalyst supported on anatase (VOx/TiO2-SG) possesses more V5+–O–V5+ and hence higher mobility of oxygen than VOx catalyst supported on rutile (VOx/TiO2-HY). VOx/TiO2-SG presents lower T50 and T90 for CVOC. High activity of VOx/TiO2-SG is related to high mobility of oxygen which weakens the adsorption of Cl species, and enhances the removal of Cl species from the surface of catalysts.
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