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Boosting the acidic electrocatalytic nitrogen reduction performance of MoS2 by strain engineering

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Abstract

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 N2 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 μg h−1 mgcat−1 at −0.2 V vs. RHE during long-term operation.

Graphical abstract: Boosting the acidic electrocatalytic nitrogen reduction performance of MoS2 by strain engineering

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Article information


Submitted
02 Apr 2020
Accepted
27 Apr 2020
First published
27 Apr 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Boosting the acidic electrocatalytic nitrogen reduction performance of MoS2 by strain engineering

J. Liang, S. Ma, J. Li, Y. Wang, J. Wu, Q. Zhang, Z. Liu, Z. Yang, K. Qu and W. Cai, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA03622F

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