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

doi:10.1016/j.molcata.2011.08.017

Catalytic combustion of hydrogen over La_1-xSr _xCoO_3-δ + Co₃O₄ and LaMn _1-xCu_xO_3+δ under simulated MCFC anode off-gas conditions

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

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The activities of two perovskite catalysts, LaMn_1-xCu _xO_3+δ (0 ≤ x ≤ 1) and La_1-xSr _xCoO_3-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 LaMn_1-xCu_xO_3+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 La_1-xSr _xCoO_3-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-xSr_xCoO_3-δ + Co₃O ₄) was comparatively active to those at x = 0.2 and 0.4.

Original language	English
Pages (from-to)	48-54
Number of pages	7
Journal	Journal of Molecular Catalysis A: Chemical
Volume	349
Issue number	1-2
DOIs	https://doi.org/10.1016/j.molcata.2011.08.017
Publication status	Published - 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

Access to Document

10.1016/j.molcata.2011.08.017

Cite this

@article{a9b76da5ddc9406a833603a6ae8b4109,

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

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.",

keywords = "Hydrogen combustion, LaMn CuO, LaSrCoO, O -TPD, Perovskite, TPR",

author = "Eom, {Hee Jun} and Jang, {Jun Ho} and Lee, {Dae Won} and Seongmin Kim and Lee, {Kwan Young}",

note = "Funding Information: Dr. Dae-Won Lee was supported by a Korea University grant. Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-C1AAA001-0093029 ). Copyright: Copyright 2011 Elsevier B.V., All rights reserved.",

year = "2011",

month = oct,

doi = "10.1016/j.molcata.2011.08.017",

language = "English",

volume = "349",

pages = "48--54",

journal = "Journal of Molecular Catalysis A: Chemical",

issn = "1381-1169",

publisher = "Elsevier",

number = "1-2",

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TY - JOUR

T1 - Catalytic combustion of hydrogen over La1-xSr xCoO3-δ + Co3O4 and LaMn 1-xCuxO3+δ under simulated MCFC anode off-gas conditions

AU - Eom, Hee Jun

AU - Jang, Jun Ho

AU - Lee, Dae Won

AU - Kim, Seongmin

AU - Lee, Kwan Young

N1 - Funding Information: Dr. Dae-Won Lee was supported by a Korea University grant. Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-C1AAA001-0093029 ). Copyright: Copyright 2011 Elsevier B.V., All rights reserved.

PY - 2011/10

Y1 - 2011/10

N2 - 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.

AB - 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.

KW - Hydrogen combustion

KW - LaMn CuO

KW - LaSrCoO

KW - O -TPD

KW - Perovskite

KW - TPR

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