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不久前本文作者等首次观察到金属钴表面氧化物的热稳定性与其氧化温度密切相关。研究对象包括多晶钴片和蒸镀的钴薄膜。它们无论是被纯氧氧化或是被空气氧化,其结果相同:室温表面氧化钴在真空中300℃加热时很容易被还原成金属钴,而对250℃形成的表面氧化钴作同样的真空热处理则不能被还原成金属钴,鉴于该现象在多相催化、金属氧化和腐蚀,电子学表面器件等研究领域中的意义,本文用X射线光电子能谱(XPS)等方法研究
Not long ago, the authors first observed for the first time that the thermal stability of oxides on metallic cobalt surfaces is closely related to their oxidation temperature. The subjects studied included polycrystalline cobalt and evaporated cobalt films. The results are the same whether they are oxidized by pure oxygen or by air. Cobalt oxide at room temperature can easily be reduced to metallic cobalt when heated at 300 ° C in vacuum, while the same vacuum heat treatment is applied to the surface cobalt oxide formed at 250 ° C It can not be reduced to metallic cobalt. In view of the significance of this phenomenon in the fields of heterogeneous catalysis, metal oxidation and corrosion, and electronic surface devices, XPS (X-ray photoelectron spectroscopy)