Catalytic combustion of hydrogen over La1-xSr xCoO3-δ + Co3O4 and LaMn 1-xCuxO3+δ under simulated MCFC anode off-gas conditions

Hee Jun Eom, Jun Ho Jang, Dae Won Lee, Seongmin Kim, Kwan Young Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The activities of two perovskite catalysts, LaMn1-xCu xO3+δ (0 ≤ x ≤ 1) and La1-xSr xCoO3-δ (0 ≤ x ≤ 1), were tested for the catalytic combustion of hydrogen under simulated molten carbonate fuel cell (MCFC) anode off-gas conditions. The catalysts were prepared using the sol-gel citrate (SGC) method and were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, oxygen temperature-programmed desorption (O2-TPD), and temperature-programmed reduction (TPR) in order to discriminate the major properties governing the activities of the catalysts. The activity of LaMn1-xCuxO3+δ was the highest at x = 0.4, at which the reducibility of B-site cations and mobility of active oxygen were the most prominent. The activity of La1-xSr xCoO3-δ was strongly related to the amount of oxygen vacancies, and the by-produced Co3O4 had a positive effect, which was the reason why the catalyst at x = 0.6 (a mixture of La 1-xSrxCoO3-δ + Co3O 4) was comparatively active to those at x = 0.2 and 0.4.

Original languageEnglish
Pages (from-to)48-54
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume349
Issue number1-2
DOIs
Publication statusPublished - 2011 Oct

Keywords

  • Hydrogen combustion
  • LaMn CuO
  • LaSrCoO
  • O -TPD
  • Perovskite
  • TPR

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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