期刊
CHEMICAL ENGINEERING JOURNAL
卷 420, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129832
关键词
MXene; NH3; Ar plasma; Delamination; Tunable nitrogen doping; Hydrogen evolution reaction; Oxygen evolution reaction
资金
- National Natural Science Foundationof China [61704114]
- Key areas of Science and Technology Program of Xinjiang Production and Construction Corps, China [2018AB004]
- National Science Foundation [CBET-1803256]
The structural properties and nitrogen content of MXene can be adjusted by controlling the volume ratio of NH3 and Ar in plasma gas, leading to improved electrocatalytic performance.
Constructing two-dimensional MXene surface defects can greatly improve electrocatalytic performance. Herein, a one-step NH3/Ar plasma treatment method was used to obtain few-layered and nitrogen-doped Ti3C2Tx MXene. The structural properties and nitrogen content of MXene were adjusted by controlling the volume ratio of NH3 and Ar in the plasma gas. When the volume ratio of ammonia-to-argon was 6:1, the obtained Ti3C2Tx-N6 had the largest C lattice parameter (13.53 angstrom), the highest nitrogen content (1.57 wt%), and the lowest HER overpotential of 119.17 mV. The XPS results and DFT calculations showed that Ti3C2Tx-N6 introduced the most surfaceadsorbed N, which reduced the energy barrier of electrocatalytic reactions of MXene.
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