Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 270, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118892
Keywords
Exfoliated NbS2; 2D nanosheets; Electrocatalysis; Nitrogen reduction reaction; Zn-N-2 battery
Funding
- National Natural Science Foundation of China [21922811, 51702284, 21878270]
- Zhejiang Provincial Natural Science Foundation of China [LR19B060002]
- Fundamental Research Funds for the Central Universities
- Startup Foundation for Hundred-Talent Program of Zhejiang University
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Electrochemical nitrogen reduction reaction (NRR) under mild conditions is an attractive prospect for ammonia synthesis. However, this process faces with poor ammonia yield rate and low Faradic efficiency. Herein, we developed exfoliated metallic niobium disulfate (NbS2) nanosheets for an electrochemical NRR. Owing to more exposed active sites and high electron transfer ability, the exfoliated NbS2 nanosheets show an extraordinary activity for electrochemical NRR. A high Faradaic efficiency of 10.12 % with an ammonia yield rate of 37.58 mu g h(-1) mg(cat)(-1) is achieved at -0.5 V versus reversible hydrogen electrode (RHE). The Nb4+ species of exfoliated NbS2 are confirmed as active sites for NRR. When the exfoliated NbS2 nanosheets are further assembled into a Zn-N-2 battery and serve as the cathode, an energy density of 714 mA h g(-1) with a power density of 0.31 mW cm(-2) is achieved. Notably, electrochemical NRR on exfoliated NbS2 nanosheets can be further driven by solar energy.
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