Enhanced performance of in-plane transition metal dichalcogenides monolayers by configuring local atomic structures

• Published in: Nature communications Vol. 11; no. 1; p. 2253
• Main Authors: Zhou, Yao, Zhang, Jing, Song, Erhong, Lin, Junhao, Zhou, Jiadong, Suenaga, Kazu, Zhou, Wu, Liu, Zheng, Liu, Jianjun, Lou, Jun, Fan, Hong Jin
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 07-05-2020; Nature Publishing Group; Nature Portfolio
• Subjects: 147/137; 639/301/299/886; 639/301/357/1018; 639/638/77/884; Adsorption; Chalcogen bonds; Chalcogenides; Charge transfer; Cobalt; Configurations; Electron transfer; Humanities and Social Sciences; Hydrogen; Hydrogen evolution reactions; Laboratories; Materials science; Molybdenum disulfide; multidisciplinary; Performance enhancement; Science; Science (multidisciplinary); Sulfur; Transition metal compounds
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-020-16111-0

The intrinsic activity of in-plane chalcogen atoms plays a significant role in the catalytic performance of transition metal dichalcogenides (TMDs). A rational modulation of the local configurations is essential to activating the in-plane chalcogen atoms but restricted by the high energy barrier to break the in-plane TM-X (X = chalcogen) bonds. Here, we theoretically design and experimentally realize the tuning of local configurations. The electron transfer capacity of local configurations is used to screen suitable TMDs materials for hydrogen evolution reaction (HER). Among various configurations, the triangular-shape cobalt atom cluster with a central sulfur vacancy (3Co
Mo
-
V
S
) renders the distinct electrocatalytic performance of MoS
2
with much reduced overpotential and Tafel slope. The present study sheds light on deeper understanding of atomic-scale local configuration in TMDs and a methodology to boost the intrinsic activity of chalcogen atoms.
Designing and realizing local configurations can activate the in-plane chalcogen atoms of transition metal dichalcogenide to enhance the HER activity. We combine the theoretical screening (charge transfer capability) and experimental realization to achieve highly active local configurations