Stability and Electric Conductivity of Barium Cerate Perovskites Co-Doped with Praseodymium
نویسندگان
چکیده
Co-doping of yttrium doped mixed barium cerate/zirconate perovskite (BCZY) with small amounts of Pr (BCZYP) substantially increases electrical conductivity while retaining structural and chemical stability. BCZYP is predominantly a proton conductor at temperatures up to 600-650 ̊C, whereas it is a mixed proton/oxide ion/electron conductor at higher temperatures. The co-doped BCZYP perovskite can be useful for applications requiring proton conduction at intermediate temperatures.
منابع مشابه
Defect Chemistry and Proton Conductivity in Ba-based Perovskites
The site incorporation mechanism of M dopants into ABO3 perovskites controls the overall defect chemistry and thus their transport properties. For charge balance reasons, incorporation onto the A site would require the creation of negatively charged point defects, such as cation vacancies, whereas incorporation onto the B site is accompanied by the generation of positively charged defects, typi...
متن کاملElectrical Properties of Indium and Yttrium-doped Barium Cerate-based Compounds for Use as Ceramic Fuel Cell Electrolytes Właściwości Elektryczne Związków Na Bazie Ceranu Baru Domieszkowanych Indem I Itrem Do Zastosowania Jako Elektrolity W Ceramicznych Ogniwach Paliwowych
The aim of this work is to compare the electrical properties of BaCe0.85Y0.15O3−δ (BCY15), BaCe0.70In0.30O3−δ (BCI30) and a composite material consisting of 30%vol. BCY15 and 70%vol. Ce0.85Y0.15O2−δ (YDC15). BCY15 and YDC15 were synthesized by co-precipitation, whereas BCI30 was obtained using the solid-state reaction method. Pellets were initially formed from powders at 5 MPa, after which they...
متن کاملDefect chemistry and transport properties of BaxCe0.85M0.15O3-
The site-incorporation mechanism of M dopants into ABO3 perovskites controls the overall defect chemistry and thus their transport properties. For charge-balance reasons, incorporation onto the A-site would require the creation of negatively charged point defects (such as cation vacancies), whereas incorporation onto the B-site is accompanied by the generation of positively charged defects, typ...
متن کاملCO2 emission free co-generation of energy and ethylene in hydrocarbon SOFC reactors with a dehydrogenation anode.
A dehydrogenation anode is reported for hydrocarbon proton conducting solid oxide fuel cells (SOFCs). A Cu-Cr(2)O(3) nanocomposite is obtained from CuCrO(2) nanoparticles as an inexpensive, efficient, carbon deposition and sintering tolerant anode catalyst. A SOFC reactor is fabricated using a Cu-Cr(2)O(3) composite as a dehydrogenation anode and a doped barium cerate as a proton conducting ele...
متن کامل