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WO3 nanosheets rich in oxygen vacancies for enhanced electrocatalytic N2 reduction to NH3

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Abstract

The Haber–Bosch process for industrial-scale NH3 production suffers from harsh conditions and serious CO2 release. Electrochemical N2 reduction is an alternative approach to synthesize NH3 under ambient conditions, but it requires highly-efficient electrocatalysts for the N2 reduction reaction (NRR). In this Communication, we demonstrate that WO3 nanosheets rich in oxygen vacancies (R-WO3 NSs) exhibit greatly enhanced NRR performances. In 0.1 M HCl, such R-WO3 NSs achieve a large NH3 yield of 17.28 μg h−1 mgcat.−1 and a high faradaic efficiency of 7.0% at −0.3 V vs. a reversible hydrogen electrode, much superior to the WO3 nanosheets deficient in oxygen vacancies (6.47 μg h−1 mgcat.−1 and 1.02%). Remarkably, R-WO3 NSs also show high electrochemical stability.

Graphical abstract: WO3 nanosheets rich in oxygen vacancies for enhanced electrocatalytic N2 reduction to NH3

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Publication details

The article was received on 30 Apr 2019, accepted on 10 Jun 2019 and first published on 10 Jun 2019


Article type: Communication
DOI: 10.1039/C9NR03678D
Nanoscale, 2019, Advance Article

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    WO3 nanosheets rich in oxygen vacancies for enhanced electrocatalytic N2 reduction to NH3

    W. Kong, R. Zhang, X. Zhang, L. Ji, G. Yu, T. Wang, Y. Luo, X. Shi, Y. Xu and X. Sun, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR03678D

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