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Issue 3, 2020
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Efficient electrocatalytic conversion of N2 to NH3 on NiWO4 under ambient conditions

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Abstract

The development of highly efficient and inexpensive catalysts is still a tremendous challenge for the electrocatalytic nitrogen reduction reaction (NRR), which is a promising alternative to high-temperature and high-pressure industrial technologies for the synthesis of NH3. Herein, we report a facile and large scale strategy exploiting a porous non-precious bimetallic oxide of NiWO4 for the NRR under ambient conditions. Benefiting from the above-mentioned merits, the designed electrocatalyst achieved outstanding catalytic activities in both 0.1 M HCl (NH3 yield: (40.05 ± 1.45) μg h−1 mg−1cat., Faraday efficiency (FE): (19.32 ± 0.68)% at −0.3 V) and 0.1 Na2SO4 (NH3 yield: (23.14 ± 1.75) μg h−1 mg−1cat., Farady efficiency: (10.18 ± 0.62)% at −0.3 V), and these efficiencies are superior to most of the reported non-precious metals for the NRR. Furthermore, the prepared catalyst presented excellent stability in both acidic and neutral media for up to 20 h. This work opens a constructive avenue for optimizing the catalytic performance of metal oxides and other transition metal-based catalysts for NRRs.

Graphical abstract: Efficient electrocatalytic conversion of N2 to NH3 on NiWO4 under ambient conditions

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Supplementary files

Article information


Submitted
12 Oct 2019
Accepted
05 Dec 2019
First published
06 Dec 2019

Nanoscale, 2020,12, 1478-1483
Article type
Paper

Efficient electrocatalytic conversion of N2 to NH3 on NiWO4 under ambient conditions

J. Wang, H. Jang, G. Li, M. G. Kim, Z. Wu, X. Liu and J. Cho, Nanoscale, 2020, 12, 1478
DOI: 10.1039/C9NR08777J

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