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Advance in Nanostructural Electrochemical Reactors for NOX Treatment in the Presence of Oxygen.

Published online by Cambridge University Press:  01 February 2011

Koichi Hamamoto ,
Yoshinobu Fujishiro ,
Masanobu Awano ,
Shingo Katayama  and
Sergei Bredikhin
Koichi Hamamoto
Affiliation:
Advanced Manufacturing Research Institute, AIST, Shimo-Shidami, Moriyama-ku, Nagoya 463–8687, Japan
Yoshinobu Fujishiro
Affiliation:
Advanced Manufacturing Research Institute, AIST, Shimo-Shidami, Moriyama-ku, Nagoya 463–8687, Japan
Masanobu Awano
Affiliation:
Advanced Manufacturing Research Institute, AIST, Shimo-Shidami, Moriyama-ku, Nagoya 463–8687, Japan
Shingo Katayama
Affiliation:
Synergy Ceramics Laboratory, FCRA, Shimo-Shidami, Moriyama-ku, Nagoya 463–8687, Japan
Sergei Bredikhin
Affiliation:
Institute of Solid State Physics Russian Academy of Science, 142432 Chernogolovka, Russia
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Abstract

Dramatic improvement in the selective separation and purification of NOX in exhaust gases by an electrochemical reactor with a catalytic electrode has been achieved. The novel electrochemical cells for NOX decomposition were developed by nano-scale control of penetrating pores from the catalytic electrode surface to the bottom of the catalytic electrode layer. The penetration pores and nano-size Ni grains are self-assembled at NiO/YSZ interfaces in the catalytic electrode by oxidization-reduction reaction of the NiO during the cell operation. In order to use reduced Ni for NOX decomposition reaction efficiently, we successfully designed a functional multilayer catalytic electrode. By multilayering of the catalytic electrode, adsorption and decomposition of coexisting oxygen in exhaust gases was suppressed and the selectivity of NOX decomposition reaction is improved. Structural change of the catalytic electrode as a result of the electrochemical processes was investigated and correlated with the NO decomposition properties of the cell.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 835: Symposium K – Solid-State Ionics , 2004 , K9.1
Copyright
Copyright © Materials Research Society 2005

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References

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