期刊
GREEN CHEMISTRY
卷 23, 期 15, 页码 5487-5493出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1gc01614h
关键词
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资金
- Key Research Program from the Science and Technology Department of Sichuan Province [20ZDYF2773]
- National Natural Science Foundation of China [22072015]
The study introduces a Cu3P nanowire array supported on copper foam as an efficient electrocatalyst for nitrite-to-ammonium conversion in neutral media. This catalyst demonstrates high ammonium yield rates, Faradaic efficiencies, and stability.
Electrochemical reduction of nitrite addresses the need for nitrite contaminant removal and provides an on-site, cost-effective, and sustainable route for rapidly generating ammonia/ammonium. Its practical implementation however requires advanced electrocatalysts with enhanced ammonium yield rates and faradaic efficiencies. Our study here introduces a Cu3P nanowire array supported on copper foam (Cu3P NA/CF) for the first time as an efficient electrocatalyst for nitrite-to-ammonium conversion in neutral media. In 0.1 M phosphate buffered saline containing 0.1 M NaNO2, the freestanding Cu3P NA/CF electrode displays a large ammonium yield rate of 1626.6 +/- 36.1 mu g h(-1) cm(-2) and a high FE of 91.2 +/- 2.5% at -0.5 V vs. a reversible hydrogen electrode, with good stability. The catalytic mechanism is revealed by density functional theory calculations.
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