Electrochemical removal of NOx using oxide-based electrodes - A review

Kent Kammer Hansen*

*Corresponding author for this work

Research output: Contribution to journalReviewResearchpeer-review

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Abstract

Solid-state electrochemical reduction of NOx using oxide-based electrodes is reviewed. Different types of electrode and cell geometries have been used in the literature. Using simple ceramic point electrodes prepared using different materials; it has been shown that nitric oxide is reduced at different rates on different materials. For perovskites, it has been shown that the amount of trivalent transition metal and amount of oxide ion vacancies are important for the reduction of nitric oxide. The same applies to Cu and Ni-based K2NiF4 structures. For spinels, the pattern is less clear, but they are all able to reduce nitric oxide. Current densities are much higher when reducing nitrogen dioxide compared with nitric oxide on both perovskites and spinels. In gas mixtures containing nitric oxide and oxygen, the addition of BaO leads to fairly high conversion of nitric oxide into nitrogen. Finally, it has been shown that oxidizing nitric oxide to nitrogen dioxide before reducing to nitrogen is very beneficial, leading to current efficiencies of up to 65%.
Original languageEnglish
JournalInternational Journal of Electrochemical Science
Volume13
Issue number10
Pages (from-to)9273-9280
ISSN1452-3981
DOIs
Publication statusPublished - 2018

Keywords

  • Electrochemical deNOx
  • NO
  • NO2
  • Oxides

Cite this

@article{95884681695441e7942b1093d6baa336,
title = "Electrochemical removal of NOx using oxide-based electrodes - A review",
abstract = "Solid-state electrochemical reduction of NOx using oxide-based electrodes is reviewed. Different types of electrode and cell geometries have been used in the literature. Using simple ceramic point electrodes prepared using different materials; it has been shown that nitric oxide is reduced at different rates on different materials. For perovskites, it has been shown that the amount of trivalent transition metal and amount of oxide ion vacancies are important for the reduction of nitric oxide. The same applies to Cu and Ni-based K2NiF4 structures. For spinels, the pattern is less clear, but they are all able to reduce nitric oxide. Current densities are much higher when reducing nitrogen dioxide compared with nitric oxide on both perovskites and spinels. In gas mixtures containing nitric oxide and oxygen, the addition of BaO leads to fairly high conversion of nitric oxide into nitrogen. Finally, it has been shown that oxidizing nitric oxide to nitrogen dioxide before reducing to nitrogen is very beneficial, leading to current efficiencies of up to 65{\%}.",
keywords = "Electrochemical deNOx, NO, NO2, Oxides",
author = "{Kammer Hansen}, Kent",
year = "2018",
doi = "10.20964/2018.10.09",
language = "English",
volume = "13",
pages = "9273--9280",
journal = "International Journal of Electrochemical Science",
issn = "1452-3981",
publisher = "Electrochemical Science Group",
number = "10",

}

Electrochemical removal of NOx using oxide-based electrodes - A review. / Kammer Hansen, Kent.

In: International Journal of Electrochemical Science, Vol. 13, No. 10, 2018, p. 9273-9280.

Research output: Contribution to journalReviewResearchpeer-review

TY - JOUR

T1 - Electrochemical removal of NOx using oxide-based electrodes - A review

AU - Kammer Hansen, Kent

PY - 2018

Y1 - 2018

N2 - Solid-state electrochemical reduction of NOx using oxide-based electrodes is reviewed. Different types of electrode and cell geometries have been used in the literature. Using simple ceramic point electrodes prepared using different materials; it has been shown that nitric oxide is reduced at different rates on different materials. For perovskites, it has been shown that the amount of trivalent transition metal and amount of oxide ion vacancies are important for the reduction of nitric oxide. The same applies to Cu and Ni-based K2NiF4 structures. For spinels, the pattern is less clear, but they are all able to reduce nitric oxide. Current densities are much higher when reducing nitrogen dioxide compared with nitric oxide on both perovskites and spinels. In gas mixtures containing nitric oxide and oxygen, the addition of BaO leads to fairly high conversion of nitric oxide into nitrogen. Finally, it has been shown that oxidizing nitric oxide to nitrogen dioxide before reducing to nitrogen is very beneficial, leading to current efficiencies of up to 65%.

AB - Solid-state electrochemical reduction of NOx using oxide-based electrodes is reviewed. Different types of electrode and cell geometries have been used in the literature. Using simple ceramic point electrodes prepared using different materials; it has been shown that nitric oxide is reduced at different rates on different materials. For perovskites, it has been shown that the amount of trivalent transition metal and amount of oxide ion vacancies are important for the reduction of nitric oxide. The same applies to Cu and Ni-based K2NiF4 structures. For spinels, the pattern is less clear, but they are all able to reduce nitric oxide. Current densities are much higher when reducing nitrogen dioxide compared with nitric oxide on both perovskites and spinels. In gas mixtures containing nitric oxide and oxygen, the addition of BaO leads to fairly high conversion of nitric oxide into nitrogen. Finally, it has been shown that oxidizing nitric oxide to nitrogen dioxide before reducing to nitrogen is very beneficial, leading to current efficiencies of up to 65%.

KW - Electrochemical deNOx

KW - NO

KW - NO2

KW - Oxides

U2 - 10.20964/2018.10.09

DO - 10.20964/2018.10.09

M3 - Review

VL - 13

SP - 9273

EP - 9280

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

SN - 1452-3981

IS - 10

ER -