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Inhibition effect of sulfation on Pt/TiO2 catalysts in methane combustion

Fanxin Kong, Hongzhi Wang, Huimei Duan*



In summary, the sulfated Pt/TiO2-S catalysts were preparedby impregnating with sulfuric acid solution. The sulfation of TiOcauses the supported Pt/TiO2-S catalysts severely deactivation towards methane combustion. It was found that sulfation of TiO2 supports suppresses the formation and stability of highly reactive Pt2+ species during methane oxidation process, weakens the adsorption of CH4 molecule, and raises activation energy barrierof the first C-H bond, eventually causing a sharp decline in activity.

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