Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

Xi Wang; Yixiang Shi; Wenying Li; Ningsheng Cai; Yuqing Wang; Tianyu Cao

doi:10.1016/j.ssi.2015.05.001

Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

Xi Wang, Yixiang Shi^*, Wenying Li, Ningsheng Cai, Yuqing Wang, Tianyu Cao

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Electrochemical reduction performances of NO and O₂ on a patterned Pt electrode were studied by electrochemical impedance spectroscopy and current voltage measurements at different temperatures and gas composition concentrations. The patterned Pt electrode was deposited on single crystalline YSZ electrolyte by an evaporation coating technique. Porous Pt electrode was used for the other electrode. A symmetric porous Pt electrode experiment was performed to eliminate the influence of the porous Pt electrode. Results showed that the porous Pt electrode resistance can be neglected when compared with the patterned electrode. The polarization performances in NO/O₂ were better than in pure O₂ or NO at low temperatures from 500 °C to 550 °C. When the temperature increased to 550 °C and 600 °C, the NO/O₂ electrochemical performance became worse than pure O₂ gas with the voltage over 1 V due to the limited N species diffusion process, N₂ desorption process or the formation of platinum oxide poisoning catalyst by high voltage. The NO/O₂ electrochemical performances increased as the NO concentrations increased from 300 ppm to 900 ppm according to the polarization results and EIS results. EIS results showed that the increase of temperature would give rise to the decrease of the impedances. The increase of O₂ concentrations from 3% to 9% also increased the NO/O₂ polarization performances and the improvement was more significant in the voltage range of 0.3 V to 1.4 V. The NO/O₂ electrochemical reaction mechanisms related to the adsorption/desorption, surface diffusion processes on the Pt surface and charge transfer reactions were proposed according to the experiment results.

Original language	English
Pages (from-to)	57-64
Number of pages	8
Journal	Solid State Ionics
Volume	277
DOIs	https://doi.org/10.1016/j.ssi.2015.05.001
Publication status	Published - 16 May 2015
Externally published	Yes

Keywords

Electrochemical reduction
Mechanisms
Nitrogen oxide
Patterned
Solid oxide electrolysis cell

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10.1016/j.ssi.2015.05.001

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@article{b16879d31a144b5ea554a8bd99b48925,

title = "Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode",

abstract = "Electrochemical reduction performances of NO and O2 on a patterned Pt electrode were studied by electrochemical impedance spectroscopy and current voltage measurements at different temperatures and gas composition concentrations. The patterned Pt electrode was deposited on single crystalline YSZ electrolyte by an evaporation coating technique. Porous Pt electrode was used for the other electrode. A symmetric porous Pt electrode experiment was performed to eliminate the influence of the porous Pt electrode. Results showed that the porous Pt electrode resistance can be neglected when compared with the patterned electrode. The polarization performances in NO/O2 were better than in pure O2 or NO at low temperatures from 500 °C to 550 °C. When the temperature increased to 550 °C and 600 °C, the NO/O2 electrochemical performance became worse than pure O2 gas with the voltage over 1 V due to the limited N species diffusion process, N2 desorption process or the formation of platinum oxide poisoning catalyst by high voltage. The NO/O2 electrochemical performances increased as the NO concentrations increased from 300 ppm to 900 ppm according to the polarization results and EIS results. EIS results showed that the increase of temperature would give rise to the decrease of the impedances. The increase of O2 concentrations from 3% to 9% also increased the NO/O2 polarization performances and the improvement was more significant in the voltage range of 0.3 V to 1.4 V. The NO/O2 electrochemical reaction mechanisms related to the adsorption/desorption, surface diffusion processes on the Pt surface and charge transfer reactions were proposed according to the experiment results.",

keywords = "Electrochemical reduction, Mechanisms, Nitrogen oxide, Patterned, Solid oxide electrolysis cell",

author = "Xi Wang and Yixiang Shi and Wenying Li and Ningsheng Cai and Yuqing Wang and Tianyu Cao",

year = "2015",

month = may,

day = "16",

doi = "10.1016/j.ssi.2015.05.001",

language = "English",

volume = "277",

pages = "57--64",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

AU - Wang, Xi

AU - Shi, Yixiang

AU - Li, Wenying

AU - Cai, Ningsheng

AU - Wang, Yuqing

AU - Cao, Tianyu

PY - 2015/5/16

Y1 - 2015/5/16

N2 - Electrochemical reduction performances of NO and O2 on a patterned Pt electrode were studied by electrochemical impedance spectroscopy and current voltage measurements at different temperatures and gas composition concentrations. The patterned Pt electrode was deposited on single crystalline YSZ electrolyte by an evaporation coating technique. Porous Pt electrode was used for the other electrode. A symmetric porous Pt electrode experiment was performed to eliminate the influence of the porous Pt electrode. Results showed that the porous Pt electrode resistance can be neglected when compared with the patterned electrode. The polarization performances in NO/O2 were better than in pure O2 or NO at low temperatures from 500 °C to 550 °C. When the temperature increased to 550 °C and 600 °C, the NO/O2 electrochemical performance became worse than pure O2 gas with the voltage over 1 V due to the limited N species diffusion process, N2 desorption process or the formation of platinum oxide poisoning catalyst by high voltage. The NO/O2 electrochemical performances increased as the NO concentrations increased from 300 ppm to 900 ppm according to the polarization results and EIS results. EIS results showed that the increase of temperature would give rise to the decrease of the impedances. The increase of O2 concentrations from 3% to 9% also increased the NO/O2 polarization performances and the improvement was more significant in the voltage range of 0.3 V to 1.4 V. The NO/O2 electrochemical reaction mechanisms related to the adsorption/desorption, surface diffusion processes on the Pt surface and charge transfer reactions were proposed according to the experiment results.

AB - Electrochemical reduction performances of NO and O2 on a patterned Pt electrode were studied by electrochemical impedance spectroscopy and current voltage measurements at different temperatures and gas composition concentrations. The patterned Pt electrode was deposited on single crystalline YSZ electrolyte by an evaporation coating technique. Porous Pt electrode was used for the other electrode. A symmetric porous Pt electrode experiment was performed to eliminate the influence of the porous Pt electrode. Results showed that the porous Pt electrode resistance can be neglected when compared with the patterned electrode. The polarization performances in NO/O2 were better than in pure O2 or NO at low temperatures from 500 °C to 550 °C. When the temperature increased to 550 °C and 600 °C, the NO/O2 electrochemical performance became worse than pure O2 gas with the voltage over 1 V due to the limited N species diffusion process, N2 desorption process or the formation of platinum oxide poisoning catalyst by high voltage. The NO/O2 electrochemical performances increased as the NO concentrations increased from 300 ppm to 900 ppm according to the polarization results and EIS results. EIS results showed that the increase of temperature would give rise to the decrease of the impedances. The increase of O2 concentrations from 3% to 9% also increased the NO/O2 polarization performances and the improvement was more significant in the voltage range of 0.3 V to 1.4 V. The NO/O2 electrochemical reaction mechanisms related to the adsorption/desorption, surface diffusion processes on the Pt surface and charge transfer reactions were proposed according to the experiment results.

KW - Electrochemical reduction

KW - Mechanisms

KW - Nitrogen oxide

KW - Patterned

KW - Solid oxide electrolysis cell

UR - http://www.scopus.com/inward/record.url?scp=84929323498&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2015.05.001

DO - 10.1016/j.ssi.2015.05.001

M3 - Article

AN - SCOPUS:84929323498

SN - 0167-2738

VL - 277

SP - 57

EP - 64

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Nitrogen oxide electrochemical reduction characteristics on patterned platinum electrode

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Keywords

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