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Scanning tunneling microscopy reveals how CO affects Rh crystallites in nanosize on TiO2.
Rhodium in nanosize (1−3 nm) was prepared by vapor deposition of Rh on a well-ordered TiO2(110)1 × 2 single crystal. The morphology and the sizes of Rh had been determined by scanning tunneling microscopy in ultrahigh vacuum. The adsorption of CO at 300 K induces the disruption of Rh crystallites as indicated by a drastic decrease in the size of Rh particles. At higher temperature it leads to the re-forming of the Rh cluster.
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Berkó et al. (1996) studied this question.
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