NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore and YSZ composite electrode

Sarohan Park; Hwa Seob Song; Heon Jin Choi; Jooho Moon

doi:10.1016/j.ssi.2004.01.078

NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore and YSZ composite electrode

Sarohan Park, Hwa Seob Song, Heon Jin Choi, Jooho Moon

Department of Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

20 Citations (Scopus)

Abstract

NO_x decomposition over the electrochemical cell that involves oxygen-conducting membrane and lanthanum stannate pyrochlore catalysts has been investigated. Removal of the oxygen adsorbed on the active sites, triple-phase boundaries, was prerequisite for electrochemical NO_x decomposition. NO_x was decomposed only after the minimum current density was applied and its conversion increased abruptly with increasing the applied current. Decomposition activity was also strongly influenced by composition, microstructure, and configuration of the working electrode. Higher decomposition was observed for the cell composed of (La₂Sn ₂O₇+YSZ)/Pt composite electrode than the platinum electrode. Such the cell sintered at 1500°C decomposed 87% NO_x at the current density ∼194 mA/cm² in the reactant gas containing 2% O₂ whereas 80.5% NO_x was reduced at 325 mA/cm² under 4% O₂ condition.

Original language	English
Pages (from-to)	625-629
Number of pages	5
Journal	Solid State Ionics
Volume	175
Issue number	1-4
DOIs	https://doi.org/10.1016/j.ssi.2004.01.078
Publication status	Published - 2004 Nov 30
Event	Fourteenth International Conference on Solid State Ionics - Monterey, CA., United States Duration: 2003 Jun 22 → 2003 Jun 27

Bibliographical note

Funding Information:
This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore and YSZ composite electrode",

abstract = "NOx decomposition over the electrochemical cell that involves oxygen-conducting membrane and lanthanum stannate pyrochlore catalysts has been investigated. Removal of the oxygen adsorbed on the active sites, triple-phase boundaries, was prerequisite for electrochemical NOx decomposition. NOx was decomposed only after the minimum current density was applied and its conversion increased abruptly with increasing the applied current. Decomposition activity was also strongly influenced by composition, microstructure, and configuration of the working electrode. Higher decomposition was observed for the cell composed of (La2Sn 2O7+YSZ)/Pt composite electrode than the platinum electrode. Such the cell sintered at 1500°C decomposed 87% NOx at the current density ∼194 mA/cm2 in the reactant gas containing 2% O2 whereas 80.5% NOx was reduced at 325 mA/cm2 under 4% O2 condition.",

author = "Sarohan Park and Song, {Hwa Seob} and Choi, {Heon Jin} and Jooho Moon",

note = "Funding Information: This research was performed by the financial support of {\textquoteleft}Center for Nanostructured Materials Technology{\textquoteright} under {\textquoteleft}21st Century Frontier R&D Programs{\textquoteright} of the Ministry of Science and Technology, Korea.; Fourteenth International Conference on Solid State Ionics ; Conference date: 22-06-2003 Through 27-06-2003",

year = "2004",

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doi = "10.1016/j.ssi.2004.01.078",

language = "English",

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journal = "Solid State Ionics",

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TY - JOUR

T1 - NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore and YSZ composite electrode

AU - Park, Sarohan

AU - Song, Hwa Seob

AU - Choi, Heon Jin

AU - Moon, Jooho

N1 - Funding Information: This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea.

PY - 2004/11/30

Y1 - 2004/11/30

N2 - NOx decomposition over the electrochemical cell that involves oxygen-conducting membrane and lanthanum stannate pyrochlore catalysts has been investigated. Removal of the oxygen adsorbed on the active sites, triple-phase boundaries, was prerequisite for electrochemical NOx decomposition. NOx was decomposed only after the minimum current density was applied and its conversion increased abruptly with increasing the applied current. Decomposition activity was also strongly influenced by composition, microstructure, and configuration of the working electrode. Higher decomposition was observed for the cell composed of (La2Sn 2O7+YSZ)/Pt composite electrode than the platinum electrode. Such the cell sintered at 1500°C decomposed 87% NOx at the current density ∼194 mA/cm2 in the reactant gas containing 2% O2 whereas 80.5% NOx was reduced at 325 mA/cm2 under 4% O2 condition.

AB - NOx decomposition over the electrochemical cell that involves oxygen-conducting membrane and lanthanum stannate pyrochlore catalysts has been investigated. Removal of the oxygen adsorbed on the active sites, triple-phase boundaries, was prerequisite for electrochemical NOx decomposition. NOx was decomposed only after the minimum current density was applied and its conversion increased abruptly with increasing the applied current. Decomposition activity was also strongly influenced by composition, microstructure, and configuration of the working electrode. Higher decomposition was observed for the cell composed of (La2Sn 2O7+YSZ)/Pt composite electrode than the platinum electrode. Such the cell sintered at 1500°C decomposed 87% NOx at the current density ∼194 mA/cm2 in the reactant gas containing 2% O2 whereas 80.5% NOx was reduced at 325 mA/cm2 under 4% O2 condition.

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U2 - 10.1016/j.ssi.2004.01.078

DO - 10.1016/j.ssi.2004.01.078

M3 - Conference article

AN - SCOPUS:10044231803

SN - 0167-2738

VL - 175

SP - 625

EP - 629

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-4

T2 - Fourteenth International Conference on Solid State Ionics

Y2 - 22 June 2003 through 27 June 2003

ER -

NO decomposition over the electrochemical cell of lanthanum stannate pyrochlore and YSZ composite electrode

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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