Intermediate Temperature Steam Electrolysis Using Doped Lanthanum Gallate Solid Electrolyte (2) Effects of CeO2 Interlayer on Activity

Nitiphong Jirathiwathanakul; Hiroshige Matsumoto; Tatsumi Ishihara

doi:10.4028/www.scientific.net/MSF.544-545.1005

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HomeMaterials Science ForumMaterials Science Forum Vols. 544-545Intermediate Temperature Steam Electrolysis Using...

Intermediate Temperature Steam Electrolysis Using Doped Lanthanum Gallate Solid Electrolyte (2) Effects of CeO₂ Interlayer on Activity

Abstract:

Steam electrolysis is attracting much interest method to produce hydrogen and also the new energy recovery process of wasted heat energy. Up to now, Y2O3 stabilized ZrO2 (YSZ) has been used for a solid electrolyte and so the operating temperature is limited down to 1273K. This study is focused on increasing the performance of steam electrolysis by using LaGaO3 based oxide for electrolyte at intermediate temperature of 873 K, which is upper limit of the obtainable wasted heat. It was found that the formation amount of H2 is almost obeyed the Faraday law up to 1.8 V suggesting that the ionic transport number of oxide ion in LaGaO3 was kept to be 1 under the steam electrolysis condition. The electrolyzing current is improved as following order; La0.6Sr0.4CoO3

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Materials Science Forum (Volumes 544-545)

Pages:

1005-1008

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.544-545.1005

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Online since:

May 2007

Authors:

Nitiphong Jirathiwathanakul, Hiroshige Matsumoto, Tatsumi Ishihara

Keywords:

Intermediate Temperature Operation, Lanthanum Gallate, Solid Oxide Electrolysis Cell

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References

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