High atomic oxygen erosion resistance of MoS2-based films by dynamic redox mechanism of CeO2
收藏中国科学院兰州化学物理研究所科学数据中心2025-12-11 更新2026-01-10 收录
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资源简介：
Low Earth orbit atomic oxygen (AO) exposure may induce irreversible degradation in spacecraft surface molybdenum disulfide (MoS₂)-based films. Here, we demonstrate that doping rare earth compounds in MoS2-based films can optimize the structure and properties of MoS2-based films. However, distinct modification effects exist among different rare earth compounds. The most interesting of these is our finding that doping with CeO2 not only optimizes the structure of MoS2 (a rare-earth element commonality), but also confers dynamic redox protection properties to the films, a mechanism derived from the synergistic effect between reversible Ce3+/Ce4+ conversion and oxygen vacancy dynamic equilibrium. These mechanisms enable films to maintain ultra-low friction coefficients below 0.02 and frictional lifetimes exceeding 1 × 106 laps after AO irradiation.
提供机构：
中国科学院兰州化学物理研究所科学数据中心
创建时间：
2025-12-11
