Edge-terminated few-layer MoS2 nanoflakes supported on TNAs@C with enhanced electrocatalysis activity for iodine reduction reaction. (June 2019)

• Record Type: Journal Article
• Authors: Wang, W.; Bi, H.; Li, C.; Zhang, J.; Feng, J.; Wang, Y.; Huang, X.; Sun, Y.; Sun, L.
• Is Part Of: Materials today nano. Volume 6(2019)
• Publication Date: 2019-06
• Subjects: MoS2 -- Edge-terminated -- Core-shell -- Electrocatalyst; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Nanoscience; Nanotechnology -- Periodicals; Periodicals; Periodical; Electronic journals; Electronic journals; 620.5
• DOI: 10.1016/j.mtnano.2019.100033
• Languages: English
• ISSNs: 2588-8420

Abstract

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. Graphical abstract: Schematic showing the construction of the TNAs@C-MoS2 and its electrocatalytic activity.Image 1 Highlights: Vertically aligned TNAs@C-MoS2 core-shell nanorod arrays were fabricated. The edge-terminated few-layer MoS2 nanoflakes were constructed on the surface of TNAs@C with abundant active sites and fast electron transport ability. TNAs@C-MoS2 was used as a Pt-free counter electrode for triiodide reduction in a dye-sensitized solar cell.