Abstract
Construction of hierarchical structures composed of edge-terminated MoS2 with abundant active sites is challenging but yet desirable for many practical applications. Herein, the edge-terminated few-layer MoS2 nanoflakes are synthesized on carbon nanofilm–coated TiO2 nanorod arrays (TNAs@C) to form vertically aligned TNAs@C-MoS2 core-shell nanostructure. This TNAs@C-MoS2 nanomaterial exhibits a large number of MoS2 active sites and possesses fast electron transport ability. When evaluated as an electrocatalyst for the triiodide reduction in a dye-sensitized solar cell, the TNAs@C-MoS2 shows higher power conversion efficiency (7.98%) than that (7.16%) of Pt. This structure engineering synthesis offers a facile and general way of manipulating the relevant device structures and provides a promising approach for producing other transition-metal dichalcogenides materials with unique properties.
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