Structural and electrical transport properties of Pr-doped SrTi0.93Co0.07O3-δ a novel SOEC fuel electrode materials - Publication - Bridge of Knowledge

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Structural and electrical transport properties of Pr-doped SrTi0.93Co0.07O3-δ a novel SOEC fuel electrode materials

Abstract

Solid Oxide Electrolyzer Cells (SOECs) are very promising electrochemical devices for the production of syngas (H2/CO) by H2O and CO2 co-electrolysis. The structure, microstructure and electrical properties of the fuel electrode material play a crucial role in the performance of the whole cell and efficiency of electrocatalytic reduction of steam into hydrogen. In the present work, a novel Co and Pr co-doped SrTiO3-δ material attracted attention as a potential fuel electrode for SOFC/SOEC. Materials with different praseodymium content were prepared by a solid-state reaction process. XRD confirmed cubic perovskite structure in all obtained samples. SEM results showed porosity in doped materials and EDX proved ABO3 stoichiometry. TEC values were about 1.17–1.26•10−5 K−1 very close to the YSZ electrolyte value. XPS studies turn out that a praseodymium can be multivalent and exist on mixed +3 and + 4 oxidation state. Electrical conductivity of samples was measured by DC 4-wire method in range of 100-800 °C. Highest value of total conductivity was achieved for Sr0.7Pr0.3Ti0.93Co0.07O3-δ and reached 23.7 S∙cm−1. The obtained results were discussed and analyzed in term of defect chemistry.

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Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
JOURNAL OF ELECTROCERAMICS no. 42, pages 31 - 40,
ISSN: 1385-3449
Language:
English
Publication year:
2018
Bibliographic description:
Kamecki B., Miruszewski T., Karczewski J.: Structural and electrical transport properties of Pr-doped SrTi0.93Co0.07O3-δ a novel SOEC fuel electrode materials// JOURNAL OF ELECTROCERAMICS. -Vol. 42, (2018), s.31-40
DOI:
Digital Object Identifier (open in new tab) 10.1007/s10832-018-0143-0
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