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Electrochemical investigation of a propane-fed solid oxide fuel cell based on a composite Ni–perovskite anode catalyst

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Abstract.
A composite Ni–perovskite anode was investigated for operation in dry propane-fed intermediate
temperature solid oxide fuel cells (IT-SOFC). A La0.6Sr0.4Fe0.8Co0.2O3 (LSFCO) perovskite, characterized by
mixed electronic–ionic conductivity, was used to support a highly dispersed Ni-phase. However, the
catalyst structure was modified during SOFC operation. X-ray diffraction analysis of the electrocatalyst
showed that, after operation, Ni was mainly present as La2NiO4; whereas, the LSFCO structure was
partially modified into a lanthanum-depleted SrFe1xCoxO3y (SFCO) perovskite structure. These results
were corroborated by X-ray photoelectron spectroscopy (XPS). Transmission electron microscopy (TEM)
analysis showed the presence of a suitable dispersion of a nanosized Ni-phase and a strong interaction of
Ni-enriched particles with the perovskite substrate. High reaction rates for the propane reaction were
achieved with this electrocatalyst while minimizing carbon deposition. Power densities of about
300 mWcm-2 for dry propane oxidation were obtained at 800 oC in the presence of a thick gadoliniadoped
ceria electrolyte. Fuel cell time-tests indicated promising electrochemical stability.

Keywords: Propane, Direct oxidation, La2NiO4, Gadolinia-doped ceria, IT-SOFC

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis B: Environmental 89 (2009) 49–57

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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