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.
Bibliographical noteFunding Information:
Dr. Dae-Won Lee was supported by a Korea University grant.
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-C1AAA001-0093029 ).
Copyright 2011 Elsevier B.V., All rights reserved.
- Hydrogen combustion
- LaMn CuO
- O -TPD
ASJC Scopus subject areas
- Process Chemistry and Technology
- Physical and Theoretical Chemistry