Affiliation:
1. State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China
2. Department of Applied Physics School of Physics and Electronics Hunan University Changsha 410082 P. R. China
3. Research Institute of Hunan University in Chongqing Chongqing 401151 P. R. China
Abstract
AbstractMolybdenum disulfide (MoS2) has gained significant attention as a promising catalyst for hydrogen evolution reaction (HER). The catalytic performance of MoS2 can be enhanced by either altering its structure or regulating external conditions. In this study, a novel approach combining the introduction of sulfur vacancy (VS) and biaxial tensile strain to create more active sites and modulate the band structure of monolayer MoS2 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 MoS2 through the synergistic effect of VS and strain. Combined with the d‐band theory, it reveals that the HER properties of VS‐MoS2 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.
Funder
Natural Science Foundation of Chongqing Municipality
Natural Science Foundation of Hunan Province
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry