Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 615, Issue -, Pages 636-642Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.01.186
Keywords
Fe-doped Co3O4 ; Nitrate reduction reaction; NH3 production ; Density functional theory
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Funding
- National Natural Science Foun-dation of China [21575137]
- Sichuan Science and Tech-nology Program [2021YFH0054]
- King Khalid University, Abha, Saudi Arabia [RGP.1/70/42]
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In this study, Fe-doped Co3O4 nanoarray is reported to efficiently catalyze NO3RR for NH3 production in neutral conditions, achieving high yield and Faradaic efficiency.
Electrochemical nitrate reduction reaction (NO3RR) is an attractive alternative to NH3 production under ambient conditions. Although noble metal-based catalysts exhibit decent NO3RR performance to NH3, the high cost and insufficient supply obstruct its large-scale application. In this work, we report that Fe doped Co3O4 nanoarray efficiently catalyzes NO3RR for NH3 production in neutral conditions. It achieves a large NH3 yield of 0.624 mg mg(cat.)(-1)h(-1) and high Faradaic efficiency of 95.5% at-0.7 V versus reversible hydrogen electrode. Besides, this catalyst exhibits good NO3RR stability. Density functional theory calculations reveal favorable adsorption of NO3- on Fe-doped Co3O4, which is conducive to NH3 production in the NO3RR process. (C)& nbsp;2022 Elsevier Inc. All rights reserved.
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