Catalytic combustion of hydrogen over La1-xSrxCoO3-delta + Co3O4 and LaMn1-xCuxO3+delta under simulated MCFC anode off-gas conditions
- Authors
- Eom, Hee-Jun; Jang, Jun Ho; Lee, Dae-Won; Kim, Seongmin; Lee, Kwan-Young
- Issue Date
- Oct-2011
- Publisher
- ELSEVIER
- Keywords
- Perovskite; La1-xSrxCoO3-delta; LaMn1-xCuxO3+delta; Hydrogen combustion; O-2-TPD; TPR
- Citation
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, v.349, no.1-2, pp.48 - 54
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
- Volume
- 349
- Number
- 1-2
- Start Page
- 48
- End Page
- 54
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111508
- DOI
- 10.1016/j.molcata.2011.08.017
- ISSN
- 1381-1169
- Abstract
- The activities of two perovskite catalysts, LaMn1-xCuxO3+delta (O <= x <= 1) and La1-xSrxCoO3-delta (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 (O-2-TPD), and temperature-programmed reduction (TPR) in order to discriminate the major properties governing the activities of the catalysts. The activity of LaMn1-xCuxO3+delta 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-xSrxCoO3-delta 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 La1-xSrxCoO3-delta + Co3O4) was comparatively active to those at x = 0.2 and 0.4. (C) 2011 Elsevier B.V. All rights reserved.
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