Journal
NANO RESEARCH
Volume 9, Issue 3, Pages 837-848Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-015-0963-z
Keywords
3D nanostructure; MoS2; graphene; carbon nanotubes; hydrogen evolution reaction
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Funding
- China Scholarship Council (CSC)
- National Natural Science Foundation of China [11275203, U1232128]
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We report a three-dimensional hierarchical ternary hybrid composite of molybdenum disulfide (MoS2), reduced graphene oxide (GO), and carbon nanotubes (CNTs) prepared by a two-step process. Firstly, reduced GO-CNT composites with three-dimensional microstructuresare synthesized by hydrothermal treatment of an aqueous dispersion of GO and CNTs to form a composite structure via pi-pi interactions. Then, MoS2 nanoparticles are hydrothermally grown on the surfaces of the GO-CNT composite. This ternary composite shows superior electrocatalytic activity and stability in the hydrogen evolution reaction, with a low onset potential of only 35 mV, a Tafel slope of similar to 38 mV center dot decade(-1), and an apparent exchange current density of 74.25 mA center dot cm(-2). The superior hydrogen evolution activity stemmed from the synergistic effect of MoS2 with its electrocatalytically active edge-sites and excellent electrical coupling to the underlying graphene and CNT network.
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