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  • 1990-1994  (1)
  • 1
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In previous work, we introduced hydrogen (H) into Ni and Pt metals at room temperature by electrolysis. To study H-vacancy interactions on an atomic scale, trapping of diffusing H atoms at impurity-vancancy complexes was detected using perturbed γ-γ angular correlations. Two new results are reported here: (1) Transformation rules are clarified between undecorated and H-decorated complexes which are detected after annealing Pt at 323 K. In addition, non-cubic In sites were observed to form by chargingannealed, Pt, which are attiributed either to H atoms at random in the lattice or to precursor nuclei of a Pt hydride. (2) NiH is observed to form under cathodic charging of Ni at high current densities, and detected by growth of a nonmagnetic, cubic metastable phase.
    Type of Medium: Electronic Resource
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