| Abstract: |
| The oxidation and electron transfer on the surface of MoS2during friction are studied by means of electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS). As the results, it is inferred that Mo4+changed to Mo6+ions in the friction failure process of MoS2 via Mo5+ion intermediate. The complexity of the oxidation process on the surface of MoS2during friction has also been noticed. Moreover, there exist a variety of chemical states of Mo during the oxidation process, and the oxidation of Mo is characteristic of single electron transfer in the Mo4d orbit. |
| Key words: MoS2, Surface oxidation, ESR, XPS, Electron transfer |
| FundProject: |
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| MoS2摩擦表面氧化与电子转移 |
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齐尚奎, 余来贵, 刘维民, 薛群基
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中国科学院兰州化学物理研究所固体润滑开放实验室, 兰州 730000
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| 摘要: |
| 利用电子自旋共振谱(ESR)和X射线光电子谱(XPS)研究了MoS2摩擦表面的氧化行为和摩擦表面氧化的电子转移，发现MoS2在摩擦失效过程中Mo4+与氧作用生成稳定的Mo6+终态氧化物，其间经过Mo5+过渡态。深入揭示了MoS2摩擦表面氧化过程的复杂性，指出Mo在摩擦表面氧化过程中以多种化学状态存在，Mo原子的氧化是Mo4d轨道上的单电子转移过程。 |
| 关键词: MoS2表面氧化 ESR XPS 未成对电子 电子转移 自由基离子 |
| DOI：10.1088/1674-0068/13/5/581-586 |
| 分类号: |
