An efficient and durable perovskite electrocatalyst for oxygen reduction in solid oxide fuel cells

Lu Li, Ziqi Kong, Bowen Yao, Hua Yang, Zhenghui Gao, Linji Xu, Feifei Dong, Meng Ni, Zhan Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Achieving superior electrocatalytic activity and thermal/chemical stability of cathode materials is the key to high-performance and durable solid oxide fuel cells (SOFC). Here, we present a barium and praseodymium co-substituted perovskite Bi0.7Pr0.1Ba0.2FeO3-δ (BPBF), a cubic-symmetry oxide phase, as a candidate cathode material for SOFC, with a focus on its crystalline structure, oxygen transport, electrocatalytic activity, as well as structural and chemical stability. The BPBF-based cathode delivers superior electroactivity, with a polarization area-specific-resistance as low as 0.056 Ω cm2 at 700 °C in symmetrical cells. Surprisingly, when exposed to both air and 1 vol% CO2-containing air at 600 °C for 100 h, the electrode activity remains constant. The prominent thermal and chemical (CO2 tolerance) stability can be ascribed to co-substitution of barium and praseodymium and high acidity of bismuth ions. Endowed with favorable electrocatalytic activity and excellent durability, the BPBF-based material can be a promising cathode to facilitate commercialization of SOFC technology.

Original languageEnglish
Article number125237
JournalChemical Engineering Journal
Volume396
DOIs
Publication statusPublished - 15 Sep 2020

Keywords

  • Cathode
  • CO tolerance
  • Oxygen reduction reaction
  • Perovskite
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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