Preparation, characterization and thermo electrical properties of co-doped Ce0.8−xSm0.2CaxO2−δ materials

Ramesh, S.; Kumar, Vijay; Kistaiah, P.; Reddy, C. Vishnuvardhan

doi:10.1016/j.ssi.2009.11.014

Cited by 81 publications

(28 citation statements)

References 24 publications

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“…Several cations, Co, Ca, Ag and Rh, have been selected to dope the base material, copper-doped ceria (hereafter named Cu-Ce), in order to improve its properties in this sense. It is expected that doping improves in several aspects: increase the oxide ion conductivity [8], change its catalytic activity for methane oxidation [9], smooth the progress of the sintering process [10] and improve it poison tolerance.…”

Section: Introductionmentioning

confidence: 99%

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Fuerte¹,

Valenzuela²,

Escudero³

2017

ujeee

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The direct use of hydrocarbon or hydrocarbon-derived fuels to generate electrical power has the potential to accelerate substantially the use of fuel cells in transportation and distributed-power applications. Most fuel-cell research has involved the use of hydrogen as the fuel, although the practical generation and storage of hydrogen remains an important technological hurdle. Although hydrocarbon fuels have been successfully oxidised or reformed electrochemically, the susceptibility to carbon formation or poor power densities has prevented the application of these fuels in practical applications. In this manuscript, the effect of different dopants on the properties of Cu-ceria based anodes for IT-SOFCs powered by hydrocarbon fuels has been explored. Four dopants atoms (Co, Ca, Ag and Rh) with different properties and concomitant varied effects on properties of the final material are studied. They have been selected in order to improve the electrical and textural properties of anode material as well as the catalytic activity for hydrocarbon oxidation. Results revealed a strong dependence of the final properties of the anode formulation and mechanism involved in the electro-oxidation of the different fuels. Different doping successfully improves the behaviour of anode material for IT-SOFCs powered by hydrocarbon fuels and reasonable power densities can be achieved.

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Section: Introductionmentioning

confidence: 99%

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Fuerte¹,

Valenzuela²,

Escudero³

2017

ujeee

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“…The application of co-doped ceria electrolytes into IT-SOFC allowed us to obtain higher power and current densities acquired from this cell compared with the same SOFC utilized as an oxide membrane, single -doped ceria with the formula Ce 1−x M x O 2−δ , M = Gd, Sm, Y and 0.1<x<0.3 [7].…”

Section: Introductionmentioning

confidence: 99%

Ionic Conductivity of the CeO2-Gd2O3-SrO System

Dudek¹,

Mosiałek²,

Mordarski³

et al. 2011

Archives of Metallurgy and Materials

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“…As reported in the * corresponding author; e-mail: aliye@istanbul.edu.tr previous studies [5][6][7], co-doping could enhance the ionic conductivity. Dopant ion, dopant concentration, oxygen vacancy concentration and local defect structure are the factors, which can influence the total ionic conductivity in doped CeO 2 [8,9].…”

Section: Introductionmentioning

confidence: 56%

“…To obtain pure doped CeO 2 powders, various techniques have been used such as citric-nitrate combustion [6] and sol-gel method [5,8], etc. Among these techniques, polyol method, which is generally used for producing metallic particles, could be employed to synthesize metal oxide particles.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Nd and Sm Co-Doped CeO₂-Based Systems

et al. 2017

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Nd0.20SmxCe0.8−xO 1.9−x/2 (x = 0, 0.05, 0.10, 0.15, 0.20) rare-earth-co-doped ceria electrolytes were synthesized by polyol process. Acetate compounds of cerium and dopants (Nd, Sm) were used as starting materials and triethylene glycol was used as a solvent. Structural and ionic conductivity properties of the electrolyte systems were determined by applying characterization techniques such as X-ray diffraction, the Fourier transform infrared spectroscopy, scanning electron microscope, and electrochemical impedance spectroscopy. The results of X-ray diffraction indicated that a single-phase fluorite structure formed at the relatively low calcination temperature of 600• C. So, the samples were calcined at 600• C for 4 h and then sintered at 1400• C for 6 h to obtain dense ceramics (between 85 and 90%). The two-probe ac impedance spectroscopy was used to study the total ionic conductivity of doped and co-doped ceria samples. The results of the impedance spectroscopy indicate that the Nd0.20Sm0.05Ce0.75O1.875 composition exhibited highest ionic conductivity value, 3.60 × 10 −2 S cm −1 at 800• C.

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Preparation, characterization and thermo electrical properties of co-doped Ce0.8−xSm0.2CaxO2−δ materials

Cited by 81 publications

References 24 publications

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Ionic Conductivity of the CeO2-Gd2O3-SrO System

Characterization of Nd and Sm Co-Doped CeO₂-Based Systems

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Preparation, characterization and thermo electrical properties of co-doped Ce0.8−xSm0.2CaxO2−δ materials

Cited by 81 publications

References 24 publications

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Role of Dopants on Ceria-based Anodes for IT-SOFCs Powered by Hydrocarbon Fuels

Ionic Conductivity of the CeO2-Gd2O3-SrO System

Characterization of Nd and Sm Co-Doped CeO2-Based Systems

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Characterization of Nd and Sm Co-Doped CeO₂-Based Systems