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We delicately controlled the selective growth of MoS2 nanosheets onto uniform CeO2 hollow spheres to form three-dimensional CeO2@MoS2 hybrid nanostructures. Importantly, CeO2 hollow spheres could significantly prevent the restacking and agglomeration of MoS2 nanosheets, which maximize the exposed active edges and surface area, thus to greatly improve the catalytic activity. As a proof of concept application, the as-harvested CeO2@MoS2 hybrid nanostructures exhibited excellent catalytic performance in ammonia decomposition for H2 production at high temperature.
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 MoNx under harsh conditions of ammonia decomposition at high temperature (700 °C), the 3D hierarchical nanostructures of the CeO2@MoNx were well kept, indicating the important role of the CeO2 support.
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