Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution

doi:10.1002/adma.201705509

	Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution
	Tan, CL; Zheng LR(郑黎荣); Zhang, H; Kloc, C; Gu, L; Wu, XJ; Han, SK; Wang, J; Goh, MH; Qi, XY
刊名	ADVANCED MATERIALS
	2018
卷号	30 期号:9 页码:1705509
关键词	hydrogen evolution metallic 1T phase MoS2 MoSSe nanodots transition metal dichalcogenides
ISSN号	0935-9648
DOI	10.1002/adma.201705509
文献子类	Article
英文摘要	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, Mo0.5W0.5S2, 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.
电子版国际标准刊号	1521-4095
WOS关键词	ACTIVE EDGE SITES ; MOS2 ULTRATHIN NANOSHEETS ; MOLYBDENUM-DISULFIDE ; CATALYTIC-ACTIVITY ; QUANTUM DOTS ; ELECTROCATALYSTS ; NANOMATERIALS ; PHASE ; SURFACE ; ENERGY
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000426491600021
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285695]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Tan, CL,Zheng LR,Zhang, H,et al. Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution[J]. ADVANCED MATERIALS,2018,30(9):1705509.
APA	Tan, CL.,郑黎荣.,Zhang, H.,Kloc, C.,Gu, L.,...&Luo, ZM.(2018).Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution.ADVANCED MATERIALS,30(9),1705509.
MLA	Tan, CL,et al."Preparation of High-Percentage 1T-Phase Transition Metal Dichalcogenide Nanodots for Electrochemical Hydrogen Evolution".ADVANCED MATERIALS 30.9(2018):1705509.