论文信息 - The electron-beam-induced reduction of transition metal oxide surfaces to metallic lower oxides

The electron-beam-induced reduction of transition metal oxide surfaces to metallic lower oxides

Abstract The clean surfaces of several maximally valent transition metal oxides, namely TiO 2 , Nb 2 O 5 , V 2 O 5 and WO 3 , have been reduced to the corresponding binary oxide during extended observation inside a 400 keV high-resolution electron microscope. Selected-area electron diffraction patterns and optical transforms direct from the high-resolution lattice images were used to identify the oxide, while electron energy loss spectra from a sample of V 2 O 5 eliminated the possibility that the isostructural carbide had been formed. These reduced binary oxides have a defective rocksalt structure, and they are metallic in nature , which may thereby stifle further electron-stimulated desorption of oxygen.

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