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

Research output: Contribution to journalArticle

68 Citations (Scopus)

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 languageEnglish
Pages (from-to)3089-3094
Number of pages6
JournalJournal of Power Sources
Volume196
Issue number6
DOIs
Publication statusPublished - 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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