Publication: Low-temperature preparation of BaCeO<inf>3</inf>through ultrasonic-assisted precipitation for application in solid oxide electrolysis cell
Issued Date
2015-06-20
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13858947
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2-s2.0-84947865302
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Mahidol University
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SCOPUS
Bibliographic Citation
Chemical Engineering Journal. Vol.278, (2015), 13-18
Suggested Citation
P. Kim-Lohsoontorn, C. Paichitra, S. Vorathamthongdee, P. Seeharaj Low-temperature preparation of BaCeO<inf>3</inf>through ultrasonic-assisted precipitation for application in solid oxide electrolysis cell. Chemical Engineering Journal. Vol.278, (2015), 13-18. doi:10.1016/j.cej.2015.01.053 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/35700
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Title
Low-temperature preparation of BaCeO<inf>3</inf>through ultrasonic-assisted precipitation for application in solid oxide electrolysis cell
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Abstract
© 2015 Elsevier B.V. Barium cerate (BaCeO3) was synthesized using conventional precipitation and ultrasonic-assisted precipitation. The effect of precipitation parameters (precipitation precursor, precipitation agent, agent concentration and temperature) significantly affected %perovskite formation and crystallite size of the product. Precipitation with 1 M (NH4)2C2O4induced the formation of a single-phase BaCeO3while precipitation with 5-20 M NaOH provided a mixed phase of BaCeO3and CeO2. The %perovskite increased as increasing precipitation temperature; however, the crystallite size of the product also increased. Increasing ultrasonic intensity (30 and 150 W cm-2) during precipitation was found to increase the %perovskite and to reduce crystallite size. The precipitation with 1 M (NH4)2C2O4agent, using ultrasonic intensity at 150 W cm-2, provided single phase BaCeO3with crystallite size of 18.4 nm after calcination at 900 °C for 4 h. The electrochemical performance of the BaCeO3cell under steam electrolysis condition (controlled voltage from OCV to 1.5 V; 20% H2O, 40% H2, and 40% N2) was measured (600-800 °C) and the activation energy of conduction was calculated to be 0.78 eV.