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dc.contributor.authorChen, S.
dc.contributor.authorXie, K.
dc.contributor.authorDong, Dehua
dc.contributor.authorLi, H.
dc.contributor.authorQin, Q.
dc.contributor.authorZhang, Y.
dc.contributor.authorWu, Y.
dc.date.accessioned2017-01-30T10:35:02Z
dc.date.available2017-01-30T10:35:02Z
dc.date.created2015-10-29T04:09:21Z
dc.date.issued2015
dc.identifier.citationChen, S. and Xie, K. and Dong, D. and Li, H. and Qin, Q. and Zhang, Y. and Wu, Y. 2015. A composite cathode based on scandium-doped chromate for direct high-temperature steam electrolysis in a symmetric solid oxide electrolyzer. Journal of Power Sources. 274: pp. 718-729.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/3920
dc.identifier.doi10.1016/j.jpowsour.2014.10.103
dc.description.abstract

Composite cathodes based on La0.75Sr0.25Cr0.5Mn0.5O3-d (LSCM) are promising candidates for direct steam electrolysis while their insufficient electro-catalytic activity still restricts Faradic efficiency and electrode performance. In this work, scandium is doped into LSCM (LSCMS) to enhance the performance of the composite cathode. The combined characterization of XRD, TEM, TGA and XPS indicates successful partial replacement of Cr/Mn by scandium in the B site of chromate. The doping of scandium remarkably improves ionic conductivity while accordingly decreases the mixed conductivity. Electrochemical measurements demonstrate the decreased electrode polarizations of LSCMS cathodes. The Faradic efficiencies are accordingly enhanced by 20% and 50% compared with the electrolyzer with LSCM cathode for high temperature steam electrolysis by exposing cathode to 5%H2O/5%H2/Ar and 5%H2O/Ar, respectively.

dc.publisherElsevier
dc.titleA composite cathode based on scandium-doped chromate for direct high-temperature steam electrolysis in a symmetric solid oxide electrolyzer
dc.typeJournal Article
dcterms.source.volume274
dcterms.source.startPage718
dcterms.source.endPage729
dcterms.source.issn0378-7753
dcterms.source.titleJournal of Power Sources
curtin.departmentFuels and Energy Technology Institute
curtin.accessStatusFulltext not available


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