Abstract
Pt TiO 2 (anatase) catalysts were prepared by the photoelectrochemical deposition of Pt from hexachloroplatinic acid solution, and their properties for CO and H 2 adsorption were characterized by infrared spectroscopic and volumetric methods. Although the dispersion of Pt deposit depends on the commercial source of TiO 2, the photodeposition of Pt followed by photoreduction with the aid of a sacrificial reducing agent leads to a good result, but the photoelectroplating of Pt in the presence of the reducing agent tends to lower Pt dispersion. The photoimpregnation of hexachloroplatinic acid followed by calcination in air and reduction in H 2 prepares well-dispersed Pt TiO 2 catalysts irrespective of the source of TiO 2.
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