Abstract:surface chemistrysurface chemistry G 7000
-026Changes of the Surface State of TiO2 in the Preparation of Sulfate Promoted Titanium Oxide -by calcining (NH4)2SO4 on anatase are investigated by IR spectroscopy, XPS, as well as acid-catalyzed esterification and acid strength measurements. It is shown that (NH4)2SO4 at temp. ¡ 523 K ( decomposition temp.) can disperse spontaneously on TiO2 as a monolayer followed by the formation of a S-Ti species, which is responsible for the super-acidity and the catalytic activ… Show more
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