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Generalized Synthesis of Hierarchical Transition Metal Dichalcogenide Nanosheets from Polyoxometalates
Author(s) -
He Peilei,
Li Haoyi,
Liu Huiling,
Wang Xun
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201500188
Subject(s) - materials science , transition metal , tungsten disulfide , nanotechnology , nanomaterials , molybdenum disulfide , rod , lamellar structure , tungsten , graphite , polyoxometalate , molybdenum , nanoparticle , catalysis , metal , chemistry , metallurgy , medicine , biochemistry , alternative medicine , pathology
Transition metal dichalcogenides (TMDs, such as MoS 2 , WS 2 and MoSe 2 ) with lamellar structures have attracted tremendous attention owing to their similar structure to graphite. However, two‐dimensional (2D) TMD nanomaterials display a strong tendency to restack and condense, which leads to a marked decrease of performance in their applications. In this study, we report the synthesis of TMDs by using polyoxometalates (POMs) as tungsten or molybdenum precursors. Hierarchical TMDs with novel structures can be formed below 200 °C, including WS 2 rods, MoS 2 rods and MoSe 2 hollow spheres. All of these structures assembled from the corresponding nanosheets. Meanwhile the epitaxial growth of noble metal nanoparticles (NPs) on TMDs could be achieved very easily. The obtained Pt/WS 2 and Pt/MoS 2 hybrids were highly active and durable HER catalysts. In addition, the Pt NPs on the surface of TMDs could improve the HER activity sharply, which was likely due to the synergistic effect between Pt NPs and MoS 2 rods.