双功能
X射线光电子能谱
催化作用
材料科学
异质结
纳米纤维
复合数
析氧
透射电子显微镜
纳米技术
化学工程
化学
复合材料
光电子学
物理化学
工程类
有机化学
电极
电化学
作者
Xuebin Hou,Kaifeng Xie,Zelong Huang,Shi Chen,Qufu Wei,Yi Hu
标识
DOI:10.1016/j.apsusc.2023.156486
摘要
The design and heterostructure construction of electrocatalysts is an essential approach for accomplishing bifunctional catalytic activity toward hydrogen and oxygen evolution (HER/OER). Here, MoS2@Co9S8/C composite nanofibers with a “blossom branch” distributed structure were prepared via a facile method. Unlike traditional composites, the MoS2 and Co9S8 consistently grow together due to the coaxed growing effect of Co toward MoS2, forming flower-like MoS2@Co9S8 nanoparticles and staggered distributed on carbon nanofibers. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) measurements, and density functional theory (DFT) calculation revealed that the close mutual combination between MoS2 and Co9S8 enhances the synergistic effect of the heterointerface, which improves the chemisorption of intermediates and further facility the catalytic reaction. MoS2@Co9S8/C composite nanofibers exhibited high activity toward HER and OER. This work provides a facile strategy for designing a heterostructure that with close mutual heterogeneous combination and without aggregation.
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