二硫化钼
单层
材料科学
空位缺陷
催化作用
拉伤
应变工程
纳米-
纳米技术
拉伸应变
极限抗拉强度
钼
纳米光刻
光电子学
化学工程
复合材料
结晶学
化学
硅
制作
有机化学
冶金
医学
替代医学
内科学
工程类
病理
作者
Xiao Liu,Zeqi Li,Huili Jiang,Xin Wang,Pufeihong Xia,Zhuojun Duan,Yizhang Ren,Haiyan Xiang,Huimin Li,Jiang Zeng,Yi‐Ge Zhou,Song Liu
出处
期刊:Small
[Wiley]
日期:2023-12-04
标识
DOI:10.1002/smll.202307293
摘要
Abstract Molybdenum disulfide (MoS 2 ) has gained significant attention as a promising catalyst for hydrogen evolution reaction (HER). The catalytic performance of MoS 2 can be enhanced by either altering its structure or regulating external conditions. In this study, a novel approach combining the introduction of sulfur vacancy ( V S ) and biaxial tensile strain to create more active sites and modulate the band structure of monolayer MoS 2 is proposed. To achieve the desired strain level, nano‐cones (NCs) array substrates facilely fabricated by dip‐pen nanolithography (DPN) are employed. The magnitude of the applied tensile strain can be finely tuned via adjusting the height of the NCs. Furthermore, on‐chip electrochemical devices are constructed based on artificial structures, enabling precise optimization of HER performance of MoS 2 through the synergistic effect of V S and strain. Combined with the d‐band theory, it reveals that the HER properties of V S ‐MoS 2 are highly dependent on the degree of tensile strain. This study presents a promising avenue for the design and preparation of high‐performance 2D catalysts for energy conversion and storage applications.
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