Self-recovery of pd nanoparticles that were dispersed over La(Sr)Fe(Mn)O 3 for intelligent oxide anodes of solid-oxide fuel cells

Tae Ho Shin, Yohei Okamoto, Shintaro Ida, Tatsumi Ishihara

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Self-recovery is one of the most-desirable properties for functional materials. Recently, oxide anodes have attracted significant attention as alternative anode materials for solid-oxide fuel cells (SOFCs) that can overcome reoxidation, deactivation, and coke-deposition. However, the electrical conductivity and surface activity of the most-widely used oxide anodes remain unsatisfactory. Herein, we report the synthesis of an "intelligent oxide anode" that exhibits self-recovery from power-density degradation in the redox cycle by using a Pd-doped La(Sr)Fe- (Mn)O 3 cell as an oxide anode for the SOFCs. We investigated the anodic performance and oxidation-tolerance of the cell by using Pd-doped perovskite as an anode and fairly high maximum power densities of 0.5 and 0.1 W cm -2 were achieved at 1073 and 873 K, respectively, despite using a 0.3 mm-thick electrolyte. Long-term stability was also examined and the power density was recovered upon exposure of the anode to air. This recovery of the power density can be explained by the formation of Pd nanoparticles, which were self-recovered through reoxidation and reduction. In addition, the self-recovery of the anode by oxidation was confirmed by XRD and SEM and this process was effective for improving the durability of SOFC systems when they were exposed to severe operating conditions.

Original languageEnglish
Pages (from-to)11695-11702
Number of pages8
JournalChemistry - A European Journal
Volume18
Issue number37
DOIs
Publication statusPublished - Sep 10 2012

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Solid oxide fuel cells (SOFC)
Oxides
Anodes
Nanoparticles
Recovery
Oxidation
Functional materials
Coke
Perovskite
Electrolytes
Durability
Degradation
Scanning electron microscopy
Air

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Self-recovery of pd nanoparticles that were dispersed over La(Sr)Fe(Mn)O 3 for intelligent oxide anodes of solid-oxide fuel cells. / Shin, Tae Ho; Okamoto, Yohei; Ida, Shintaro; Ishihara, Tatsumi.

In: Chemistry - A European Journal, Vol. 18, No. 37, 10.09.2012, p. 11695-11702.

Research output: Contribution to journalArticle

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