Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Nitrogen vacancies on 2D layered W₂N₃: a stable and efficient active site for nitrogen reduction reaction
Other Titles: Nitrogen vacancies on 2D layered W(2)N(3): a stable and efficient active site for nitrogen reduction reaction
Author: Jin, H.
Li, L.
Liu, X.
Tang, C.
Xu, W.
Chen, S.
Song, L.
Zheng, Y.
Qiao, S.
Citation: Advanced Materials, 2019; 31(32):1-8
Publisher: Wiley
Issue Date: 2019
ISSN: 0935-9648
Statement of
Huanyu Jin, Laiquan Li, Xin Liu, Cheng Tang, Wenjie Xu, Shuangming Chen, Li Song, Yao Zheng and Shi-Zhang Qiao
Abstract: Electrochemical nitrogen reduction reaction (NRR) under ambient conditions provides an avenue to produce carbon-free hydrogen carriers. However, the selectivity and activity of NRR are still hindered by the sluggish reaction kinetics. Nitrogen Vacancies on transition metal nitrides are considered as one of the most ideal active sites for NRR by virtue of their unique vacancy properties such as appropriate adsorption energy to dinitrogen molecule. However, their catalytic performance is usually limited by the unstable feature. Herein, a new 2D layered W2 N3 nanosheet is prepared and the nitrogen vacancies are demonstrated to be active for electrochemical NRR with a steady ammonia production rate of 11.66 ± 0.98 µg h-1 mgcata -1 (3.80 ± 0.32 × 10-11 mol cm-2 s-1 ) and Faradaic efficiency of 11.67 ± 0.93% at -0.2 V versus reversible hydrogen electrode for 12 cycles (24 h). A series of ex situ synchrotron-based characterizations prove that the nitrogen vacancies on 2D W2 N3 are stable by virtue of the high valence state of tungsten atoms and 2D confinement effect. Density function theory calculations suggest that nitrogen vacancies on W2 N3 can provide an electron-deficient environment which not only facilitates nitrogen adsorption, but also lowers the thermodynamic limiting potential of NRR.
Keywords: 2D materials; ammonia; electrocatalysis; nitrogen reduction; nitrogen vacancy
Rights: © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
RMID: 0030118089
DOI: 10.1002/adma.201902709
Grant ID:
Appears in Collections:Chemical Engineering publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.