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The geometric and electronic structures of the V2O5(010) surface with oxygen vacancies were studied by means of scanning tunneling microscopy/spectroscopy. Vanadyl oxygens which play an important role in an oxidization catalyst are found to be easily desorbed in a line along the c axis by annealing the sample above 500 °C. We obtained the current images of vanadium V4+ ion rows caused by the desorption of vanadyl oxygens and also the images of V5+ ion rows distinctively. Periodic vanadium ion rows having about a half-space of lattice constant a of V2O5 were observed when almost all vanadyl oxygens were desorbed from the surface.
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Oshio et al. (1994) studied this question.
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