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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Barium substituted lanthanum manganite perovskite for CO2 reforming of methane

Cited 5 times inthomson ciCited 2 times inthomson ci
Title
Barium substituted lanthanum manganite perovskite for CO2 reforming of methane
Author
Bhavani, Annabathini GeethaKim, Won YongLee, Jae Sung
Keywords
Auto-thermal; Dry-methane reforming; Highly ordered pores; LaMnO3; Lanthanum manganites; Oxygen mobility; Perovskite catalysts; Single phase perovskite structure
Issue Date
201307
Publisher
AMER CHEMICAL SOC
Citation
ACS CATALYSIS, v.3, no.7, pp.1537 - 1544
Abstract
Barium substituted lanthanum manganite La1-xBa xMnO3 (x = 0.10-0.50) of a single phase perovskite structure was used as catalysts for CO2 reforming of CH4 for the first time. The optimal level of Ba substitution (Ba/Mn = 0.10, 0.15) produced La1-xBaxMnO3 of high surface area, uniform particle dispersion, and highly ordered pores. The optimally substituted perovskite catalysts showed much improved reducibility of Mn 3+/Mn4+ to Mn2+ to provide oxygen vacancies and rapid migration of lattice oxygen from the bulk toward the surface. The ability of donating lattice oxygen to the catalytic cycle seems responsible for the facilitated decomposition and dissociation of CH4 and CO2, which led to high conversions, excellent syngas selectivity, and stability with little coke formation. The addition of oxygen to the dry reforming reaction showed improved conversion and selectivity to syngas by making catalysts less prone to coke formation. To the best of our knowledge, the results represent the first example of Mn-based reforming catalysts that perform better than more common Ni-based catalysts of the same structure.
URI
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DOI
http://dx.doi.org/10.1021/cs400245m
ISSN
2155-5435
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