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We investigated the mechanism by which a surface oxide layer on Pd(111) transforms to a PdO(101) thin film during oxidation with gaseous oxygen atoms in ultrahigh vacuum. Our results provide evidence that the precursor to bulk PdO formation is a distinct oxide phase that forms as small particles, referred to as PdO seeds, after the surface oxide saturates. With increasing oxygen coverage, the PdO...
We present experimental results demonstrating that a high quality PdO(101) thin film can be grown on Pd(111) in ultrahigh vacuum by oxidizing the metal at 500K using an oxygen atom beam, followed by annealing to 675K. Low energy electron diffraction (LEED) images show that the [010] direction of the PdO(101) thin film aligns with the [−110] direction of the Pd(111) substrate, and that the PdO film...
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