Journal article
Scalable Synthesis of 2D Mo2 C and Thickness-Dependent Hydrogen Evolution on Its Basal Plane and Edges
Advanced materials (Weinheim), v 35(25), e2209954
13 Feb 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
2D transition metal carbides (2D TMCs and MXenes) are promising candidates for applications of energy storage and catalysis. However, producing high-quality, large 2D flakes of Mo2C MXene has been challenging. Here, a new salt-assisted templating approach is reported that enables the direct synthesis of 2D Mo2C with low defect concentrations. KCl acts as a template to form an intermediate 2D product, facilitating Mo2C formation without coarsening upon melting. The thickness of the flakes produced can range from monolayer (0.36 nm) to 10 layers (4.55 nm), and the electrocatalytical hydrogen evolution reaction (HER) activity of 2D Mo2C is inversely proportional to its thickness. The monolayer Mo2C shows remarkable HER performance with a current density of ≈6800 mA cm−2 at 470 mV versus reversible hydrogen electrode and an ultrahigh turnover frequency of ≈17 500 s−1. This salt-assisted synthesis approach can also produce WC and V8C7 nanosheets, expanding the family of 2D carbides. The new pathway eliminates the need for layered ceramic precursors, making it a versatile approach to direct synthesis of MXene-like 2D carbides.
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Details
- Title
- Scalable Synthesis of 2D Mo2 C and Thickness-Dependent Hydrogen Evolution on Its Basal Plane and Edges
- Creators
- Jiabin Wu - Tsinghua UniversityJianwei Su - Huazhong University of Science and TechnologyTao Wu - Dalian University of TechnologyLiang Huang - Wuhan National Laboratory for OptoelectronicsQun Li - Wuhan National Laboratory for OptoelectronicsYongxin Luo - Wuhan National Laboratory for OptoelectronicsHongrun Jin - Wuhan National Laboratory for OptoelectronicsJun Zhou - Wuhan National Laboratory for OptoelectronicsTianyou Zhai - Huazhong University of Science and TechnologyDingsheng Wang - Tsinghua UniversityYury Gogotsi - Drexel UniversityYadong Li - Tsinghua University
- Publication Details
- Advanced materials (Weinheim), v 35(25), e2209954
- Publisher
- Wiley
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000980980400001
- Scopus ID
- 2-s2.0-85150984853
- Other Identifier
- 991020077593604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter