Enhanced electrochemical performance of BaZr0.1Ce0.7Y0.1Yb0.1O3-delta electrodes for hydrogen and methane oxidation in solid oxide fuel cells by Pd or Cu0.5Pd0.5 impregnation

Zhang, Jiang-Tao, Liang, Feng-Li, Chi, Bo, Pu, Jian and Jian, Li (2012) Enhanced electrochemical performance of BaZr0.1Ce0.7Y0.1Yb0.1O3-delta electrodes for hydrogen and methane oxidation in solid oxide fuel cells by Pd or Cu0.5Pd0.5 impregnation. Journal of Power Sources, 200 29-33. doi:10.1016/j.jpowsour.2011.10.082


Author Zhang, Jiang-Tao
Liang, Feng-Li
Chi, Bo
Pu, Jian
Jian, Li
Title Enhanced electrochemical performance of BaZr0.1Ce0.7Y0.1Yb0.1O3-delta electrodes for hydrogen and methane oxidation in solid oxide fuel cells by Pd or Cu0.5Pd0.5 impregnation
Formatted title
Enhanced electrochemical performance of BaZr0.1Ce0.7Y0.1Yb0.1O3−δ electrodes for
hydrogen and methane oxidation in solid oxide fuel cells by Pd or Cu0.5Pd0.5
impregnation
Journal name Journal of Power Sources   Check publisher's open access policy
ISSN 0378-7753
1873-2755
Publication date 2012-02-01
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.jpowsour.2011.10.082
Volume 200
Start page 29
End page 33
Total pages 5
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
The anode material BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) for solid oxide fuel cells (SOFCs) is prepared by solid state reaction method and its chemical compatibility with Y2O3 stabilized ZrO2 (YSZ) is evaluated. The electrochemical performance of the pure and Pd- and Cu0.5Pd0.5-impreganated BZCYYb electrodes is characterized in the temperature range between 650 and 750°C by AC impedance spectroscopy in H2 and/or CH4 atmospheres, respectively, under the condition of open circuit. It is confirmed that the BZCYYb is chemically compatible with the YSZ at temperatures below 1000°C. The polarization resistance of the BZCYYb anode in H2 is decreased from 2.08 to 0.51 Ω cm2 as the measuring temperature increases from 650 to 750 °C with an activation energy of 117 kJ mol−1. With Pd- or Cu0.5Pd0.5-impregnation, the polarization resistance of the BZCYYb electrode in H2 is reduced significantly to approximately 0.40 Ω cm2 at 650°C and 0.12 Ω cm2 at 750°C. With dry CH4 as the fuel, the polarization resistance of the Pd- and Cu0.5Pd0.5-impregnated BZCYYb anodes is obviously increased below 1.00 Ω cm2 at 650°C and 0.22 Ω cm2 at 750°C. Both Pd and Cu0.5Pd0.5 impregnations are equivalently effective in enhancing the electrochemical performance of the BZCYYb anode.
Keyword Solid oxide fuel cell
BaZr0.1Ce0.7Y0.1Yb0.1O3-delta anode
Pd impregnation
Hydrogen oxidation
Methane
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 25 October 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2012 Collection
 
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