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In the present work, a number of Al 2 O 3 - and Al 2 O 3 –ZrO 2 -supported catalysts were prepared and studied. The microstructure of the particles formed in these systems was analyzed by high-resolution electron microscopy (HREM). HREM images of Al 2 O 3 -supported catalysts revealed a broad particle-size distribution, with a major Pt phase...
By combining FTIR spectroscopy of chemisorbed CO and HRTEM, we have studied the evolution undergone by the metal chemisorption capability and nanostructural properties of a Pt/CeO 2 catalyst reduced at increasing temperatures from 200 to 500°C. As revealed by the ν CO integrated absorption data on Pt, a progressive metal deactivation is observed. The analysis of the HRTEM micrographs...
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