期刊
ELECTROCHIMICA ACTA
卷 407, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.139929
关键词
Hollow carbon spheres; Molybdenum disulfide; Hydrogen evolution reaction; Supercapacitor
资金
- National Natural Science Foundation of China, China [51772130, 51972145]
- Ji Nan Science & Technology Bureau, China [2019GXRC016, 2021GXRC109]
- University of Jinan, China [XKY2118]
A core-shell structure of MoS2 nanosheets decorated double-layered hollow carbon spheres (DLHCs@MoS2) was synthesized to enhance electrochemical activity. This dual-functional nanocomposite material exhibited excellent performance in hydrogen evolution reaction and supercapacitors, making it a promising low-cost and high-efficiency material.
MoS2 nanosheets decorated double-layered hollow carbon spheres (DLHCs@MoS2) were synthesized to form a core-shell structure for enhanced electrochemical activity. Double-layer hollow carbon spheres (DLHCs) was first prepared using a template route while the vertical growth of MoS2 nanosheets was carried out via a hydrothermal synthesis. X-ray absorption near edge structure and X-ray absorption fine structure measurement confirmed that MoS2 was strongly coupled with DLHCs through Mo-O-C heterointerface. As a dual-functional nanocomposite material, DLHCs@MoS2 revealed ideal performance in terms of hydrogen evolution reaction and supercapacitors. DLHCs as matrix materialsplay an important role to decrease the agglomeration of MoS2 nanosheets, expose more active sites,and improve conductivity. Because of the core-shell structure, DLHCs@MoS2 is more conducive to expose active sites compared with pure MoS2 nanosheets. DLHCs@MoS2 exhibited low Tafel slope and small onset potential. In addition, DLHCs@MoS2 composites used as supercapacitor electrode revealed excellent specific capacitance of 399.4 Fg(-1) in acurrent density of 0.5 Ag-1. This result provides an idea for synthesizing low-cost and high efficiency dual-functional materials. (C) 2022 Elsevier Ltd. All rights reserved.
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