Pd-substituted (La,Sr)CrO3-δ-Ce0.9Gd 0.1O2-δ solid oxide fuel cell anodes exhibiting regenerative behavior

David M. Bierschenk; Elizabeth Potter-Nelson; Cathleen Hoel; Yougui Liao; Laurence Marks; Kenneth R. Poeppelmeier; Scott A. Barnett

doi:10.1016/j.jpowsour.2010.12.050

Pd-substituted (La,Sr)CrO_3-δ-Ce_0.9Gd _0.1O_2-δ solid oxide fuel cell anodes exhibiting regenerative behavior

David M. Bierschenk, Elizabeth Potter-Nelson, Cathleen Hoel, Yougui Liao, Laurence Marks, Kenneth R. Poeppelmeier, Scott A. Barnett

Northwestern University

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

76 Citations (Scopus)

Abstract

Composite anodes consisting of Pd-substituted (La,Sr)CrO _3-δ mixed with 50 wt% Ce_0.9Gd_0.1O _2-δ were tested in La_0.9Sr_0.1Ga _0.8Mg_0.2O_3-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	https://doi.org/10.1016/j.jpowsour.2010.12.050
Publication status	Published - Mar 15 2011

Keywords

Catalyst
Oxide anode
Palladium
Perovskite
SOFC

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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Pd-substituted (La,Sr)CrO_3-δ-Ce_0.9Gd _0.1O_2-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 › peer-review

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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.",

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AU - Bierschenk, David M.

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AU - Hoel, Cathleen

AU - Liao, Yougui

AU - Marks, Laurence

AU - Poeppelmeier, Kenneth R.

AU - Barnett, Scott A.

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