Unsaturated Single Atoms on Monolayer Transition Metal Dichalcogenides for Ultrafast Hydrogen Evolution

doi:10.1021/acsnano.9b07763

IMR OpenIR

	Unsaturated Single Atoms on Monolayer Transition Metal Dichalcogenides for Ultrafast Hydrogen Evolution
	Luo, Yuting; Zhang, Shuqing; Pan, Haiyang; Xiao, Shujie; Guo, Zenglong; Tang, Lei; Khan, Usman; Ding, Bao-Fu; Li, Meng; Cai, Zhengyan; Zhao, Yue; Lv, Wei; Feng, Qingliang; Zou, Xiaolong; Lin, Junhao; Cheng, Hui-Ming; Liu, Bilu
	2020
Source Publication	ACS NANO
Volume	14 Issue:1 Pages:767-776
Abstract	Large-scale implementation of electrochemical water splitting for hydrogen evolution requires cheap and efficient catalysts to replace expensive platinum. However, catalysts that work well at high current densities with ultrafast intrinsic activities is still the central challenge for hydrogen evolution. An ideal case is to use single atoms on monolayer two-dimensional (2D) materials, which simplifies the system and in turn benefits the mechanism study, but is a grand challenge to synthesize. Here, we report a universal cold hydrogen plasma reduction method for synthesizing different single atoms sitting on 2D monolayers. In the case of molybdenum disulfide, we design and identify a type of active site, i.e., unsaturated Mo single atoms on cogenetic monolayer molybdenum disulfide. The catalyst shows exceptional intrinsic activity with a Tafel slope of 36.4 mV dec(-1) in 0.5 M H2SO4 and superior performance at a high current density of 400 mA cm(-2) with an overpotential of similar to 260 mV, based on single flake microcell measurements. Theoretical studies indicate that coordinately unsaturated Mo single atoms sitting on molybdenum disulfide increase the bond strength between adsorbed hydrogen atoms and the substrates through hybridization, leading to fast hydrogen adsorption/desorption kinetics and superior hydrogen evolution activity. This work shines fresh light on preparing highly efficient electrocatalysts for water splitting and other electrochemical processes, as well as provides a general method to synthesize single atoms on two-dimensional monolayers.
DOI	10.1021/acsnano.9b07763
WOS ID	WOS:000510531500067
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/83290
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Luo, Yuting,Zhang, Shuqing,Pan, Haiyang,et al. Unsaturated Single Atoms on Monolayer Transition Metal Dichalcogenides for Ultrafast Hydrogen Evolution[J]. ACS NANO,2020,14(1):767-776.
APA	Luo, Yuting.,Zhang, Shuqing.,Pan, Haiyang.,Xiao, Shujie.,Guo, Zenglong.,...&Liu, Bilu.(2020).Unsaturated Single Atoms on Monolayer Transition Metal Dichalcogenides for Ultrafast Hydrogen Evolution.ACS NANO,14(1),767-776.
MLA	Luo, Yuting,et al."Unsaturated Single Atoms on Monolayer Transition Metal Dichalcogenides for Ultrafast Hydrogen Evolution".ACS NANO 14.1(2020):767-776.

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