Abstract
Studies carried out by transmission electron microscopy (TEM) and transmission electron diffraction (TED) on small supported Pd particles have shown that particles heated in CO + O 2 mixtures undergo changes both in morphology and in epitaxial orientation on the mica substrate. Investigations performed in bright- and dark-field TEM, before and after treatments, indicated that the changes occurring in the samples are dependent on the size of the as-deposited particles. The stabilized Pd/mica samples have well-defined structures, exhibiting a high percentage of halfcuboctahedral particles, and they can be used as good model catalysts.
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