Chou-Kun Tang, Xi Zheng, Xiao-Liang Chen, Yu-Gang Fu, Qiu-Feng Lü
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引用次数: 0
Abstract
Electrocatalytic hydrogen production is an effective way to produce hydrogen energy, and the key is to find inexpensive and effective catalysts. Loading transition metal sulfides onto two-dimensional transition metal carbide (MXene) is an effective method to prepare cheap and high-performance hydrogen evolution reaction (HER) catalysts. In this study, Mo2TiAlC2 was etched with hydrofluoric acid to prepare Mo2TiC2Tx MXene, which was then composited with MoS2 and CoS2 to prepare defect-rich MoS2/CoS2@Mo2TiC2Tx composite by a hydrothermal method. MoS2/CoS2 provides a large number of active sites for electrocatalysis, while Mo2TiC2Tx MXene as a carrier not only provides nucleation and growth sites for MoS2/CoS2, but also increases the rate of electron transfer in HER process, which achieves good synergy between MoS2/CoS2 and Mo2TiC2Tx MXene. Consequently, MoS2/CoS2-2@Mo2TiC2Tx exhibits an excellent HER performance. When the current density reaches 10 mA cm−2, the optimal MoS2/CoS2-2@Mo2TiC2Tx catalyst only requires an overpotential of 80 mV, and exhibits good cycling stability and durability. This work gives a new idea for the preparation of efficient HER catalysts using non-precious metal composites to replace the precious Pt/C.
期刊介绍:
FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)