Direct Synthesis of Carbon–Molybdenum Carbide Nanosheet Composites via a Pseudotopotactic Solid-State Reaction

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• 作者：Katsutoshi FukudaMasahito Morita ; Satoshi Toyoda ; Akiyoshi Nakata ; Koji Tanaka ; Yoshiharu Uchimoto ; Eiichiro Matsubara
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：December 27, 2016
• 年：2016
• 卷：28
• 期：24
• 页码：8899-8904
• 全文大小：366K
• ISSN：1520-5002

文摘

We report the solid-state reaction of MoO₂ nanosheets, obtained from the soft-chemical delamination of Na_0.9Mo₂O₄, into metallic Mo₂C single layers that constitute a new family of versatile carbide nanosheets. This so-called pseudotopotactic reaction, i.e., conversion from nanosheet to nanosheet, is aided by the use of cationic polymers as binders for the film growth based on electrostatic self-assembly. Compared to Mo₂C in the bulk form, 2D anisotropic Mo₂C sheets having a larger surface-area-to-volume ratio are of significant use in potential electrochemical applications, and it is also worth noting that the thickness of Mo₂C sheets can be controlled in the nanometer range by altering the stacking number of the precursor nanosheets.