期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 20, 页码 10426-10432出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta03622f
关键词
-
资金
- National Natural Science Foundation of China [21875224, 21703211, 21703212]
It has been widely confirmed that expanding the layer spacing of layer-structured MoS2 can boost the hydrogen evolution reaction (HER) activity of MoS2. Inspired by this, a strain engineering strategy was applied to defect-rich MoS2 nanosheets by facilely substituting F to compress the interlayer space of MoS2. Because of the smaller size and higher electronegativity of F as compared to S, the catalytic HER was remarkably suppressed. By considering the strongly reduced uphill energy for the hydrogenation of adsorbed N-2 on MoS2 due to the introduction of F ions, as revealed by first-principles calculations, electrochemical nitrogen reduction reaction (NRR) activity and selectivity on the F-doped MoS2 (F-MoS2) catalyst under acidic conditions can be significantly boosted. Faradaic efficiency toward the NRR on F-MoS2 was therefore enhanced to 20.6% with a maximum NH3 yield of 35.7 mu g h(-1) mg(cat)(-1) at -0.2 V vs. RHE during long-term operation.
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