Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/138720
Title: | Preparation of high-percentage 1T-phase transition metal dichalcogenide nanodots for electrochemical hydrogen evolution | Authors: | Tan, Chaoliang Luo, Zhimin Chaturvedi, Apoorva Cai, Yongqing Du, Yonghua Gong, Yue Huang, Ying Lai, Zhuangchai Zhang, Xiao Zheng, Lirong Qi, Xiaoying Goh, Min Hao Wang, Jie Han, Shikui Wu, Xue-Jun Gu, Lin Kloc, Christian Zhang, Hua |
Keywords: | Engineering::Materials | Issue Date: | 2018 | Source: | Tan, C., Luo, Z., Chaturvedi, A., Cai, Y., Du, Y., Gong, Y., . . . Zhang, H. (2018). Preparation of high-percentage 1T-phase transition metal dichalcogenide nanodots for electrochemical hydrogen evolution. Advanced materials, 30(9), 1705509-. doi:10.1002/adma.201705509 | Journal: | Advanced materials | Abstract: | Nanostructured transition metal dichalcogenides (TMDs) are proven to be efficient and robust earth-abundant electrocatalysts to potentially replace precious platinum-based catalysts for the hydrogen evolution reaction (HER). However, the catalytic efficiency of reported TMD catalysts is still limited by their low-density active sites, low conductivity, and/or uncleaned surface. Herein, a general and facile method is reported for high-yield, large-scale production of water-dispersed, ultrasmall-sized, high-percentage 1T-phase, single-layer TMD nanodots with high-density active edge sites and clean surface, including MoS2 , WS2 , MoSe2 , Mo0.5 W0.5 S2 , and MoSSe, which exhibit much enhanced electrochemical HER performances as compared to their corresponding nanosheets. Impressively, the obtained MoSSe nanodots achieve a low overpotential of -140 mV at current density of 10 mA cm-2 , a Tafel slope of 40 mV dec-1 , and excellent long-term durability. The experimental and theoretical results suggest that the excellent catalytic activity of MoSSe nanodots is attributed to the high-density active edge sites, high-percentage metallic 1T phase, alloying effect and basal-plane Se-vacancy. This work provides a universal and effective way toward the synthesis of TMD nanostructures with abundant active sites for electrocatalysis, which can also be used for other applications such as batteries, sensors, and bioimaging. | URI: | https://hdl.handle.net/10356/138720 | ISSN: | 0935-9648 | DOI: | 10.1002/adma.201705509 | Schools: | School of Materials Science & Engineering | Organisations: | Center for Programmable Materials | Rights: | © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced materials and is made available with permission of WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | Fulltext Permission: | none | Fulltext Availability: | No Fulltext |
Appears in Collections: | MSE Journal Articles |
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