Thermally Stable Hierarchical Nanostructures of Ultrathin MoS2 Nanosheet-Coated CeO2 Hollow Spheres as Catalyst for Ammonia Decomposition

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• 作者：Xueyun Gong ; Ying-Qiu Gu ; Na Li ; Hongyang Zhao ; Chun-Jiang Jia ; Yaping Du
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：April 18, 2016
• 年：2016
• 卷：55
• 期：8
• 页码：3992-3999
• 全文大小：661K
• 年卷期：0
• ISSN：1520-510X

文摘

MoS₂ ultrathin nanosheet-coated CeO₂ hollow sphere (CeO₂@MoS₂) hybrid nanostructures with a 3D hierarchical configuration were successfully constructed from a facile two-step wet chemistry strategy: first, CeO₂ formed on a silica core which served as a template and was subsequently removed by NaOH solution to attain hollow spheres, and then few-layered ultrathin MoS₂ nanosheets were deposited on the CeO₂ hollow spheres through a hydrothermal process. As a proof of concept application, the as-prepared CeO₂@MoS₂ hybrid nanostructures were used as catalytic material, which exhibited enhanced catalytic activity in ammonia decomposition for H₂ production at high temperature. It was demonstrated that, even with a structural transformation from MoS₂ to MoN_x under harsh conditions of ammonia decomposition at high temperature (700 °C), the 3D hierarchical nanostructures of the CeO₂@MoN_x were well kept, indicating the important role of the CeO₂ support.