Abstract
Composite anodes consisting of Pd-substituted (La,Sr)CrO 3-δ mixed with 50 wt% Ce0.9Gd0.1O 2-δ were tested in La0.9Sr0.1Ga 0.8Mg0.2O3-δ-electrolyte supported fuel cells at 800 °C with humidified H2 fuel. Low anode polarization resistance was observed during the first several hours of operation, explained by the nucleation of Pd nano-particles on perovskite particle surfaces. Anode performance then degraded gradually before stabilizing. Redox cycling repeatedly restored the anodes to their initial peak performance, followed again by degradation. This regenerative behavior was explained by the observation that the Pd nano-particles were removed by oxidation, and then re-nucleated upon reduction.
| Original language | English |
|---|---|
| Pages (from-to) | 3089-3094 |
| Number of pages | 6 |
| Journal | Journal of Power Sources |
| Volume | 196 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Mar 15 2011 |
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Keywords
- Catalyst
- Oxide anode
- Palladium
- Perovskite
- SOFC
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Physical and Theoretical Chemistry
Cite this
Pd-substituted (La,Sr)CrO3-δ-Ce0.9Gd 0.1O2-δ solid oxide fuel cell anodes exhibiting regenerative behavior. / Bierschenk, David M.; Potter-Nelson, Elizabeth; Hoel, Cathleen; Liao, Yougui; Marks, Laurence; Poeppelmeier, Kenneth R; Barnett, Scott A.
In: Journal of Power Sources, Vol. 196, No. 6, 15.03.2011, p. 3089-3094.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pd-substituted (La,Sr)CrO3-δ-Ce0.9Gd 0.1O2-δ solid oxide fuel cell anodes exhibiting regenerative behavior
AU - Bierschenk, David M.
AU - Potter-Nelson, Elizabeth
AU - Hoel, Cathleen
AU - Liao, Yougui
AU - Marks, Laurence
AU - Poeppelmeier, Kenneth R
AU - Barnett, Scott A.
PY - 2011/3/15
Y1 - 2011/3/15
N2 - Composite anodes consisting of Pd-substituted (La,Sr)CrO 3-δ mixed with 50 wt% Ce0.9Gd0.1O 2-δ were tested in La0.9Sr0.1Ga 0.8Mg0.2O3-δ-electrolyte supported fuel cells at 800 °C with humidified H2 fuel. Low anode polarization resistance was observed during the first several hours of operation, explained by the nucleation of Pd nano-particles on perovskite particle surfaces. Anode performance then degraded gradually before stabilizing. Redox cycling repeatedly restored the anodes to their initial peak performance, followed again by degradation. This regenerative behavior was explained by the observation that the Pd nano-particles were removed by oxidation, and then re-nucleated upon reduction.
AB - Composite anodes consisting of Pd-substituted (La,Sr)CrO 3-δ mixed with 50 wt% Ce0.9Gd0.1O 2-δ were tested in La0.9Sr0.1Ga 0.8Mg0.2O3-δ-electrolyte supported fuel cells at 800 °C with humidified H2 fuel. Low anode polarization resistance was observed during the first several hours of operation, explained by the nucleation of Pd nano-particles on perovskite particle surfaces. Anode performance then degraded gradually before stabilizing. Redox cycling repeatedly restored the anodes to their initial peak performance, followed again by degradation. This regenerative behavior was explained by the observation that the Pd nano-particles were removed by oxidation, and then re-nucleated upon reduction.
KW - Catalyst
KW - Oxide anode
KW - Palladium
KW - Perovskite
KW - SOFC
UR - http://www.scopus.com/inward/record.url?scp=78751620576&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78751620576&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2010.12.050
DO - 10.1016/j.jpowsour.2010.12.050
M3 - Article
VL - 196
SP - 3089
EP - 3094
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 6
ER -