Activating and modulating ferroelectric and optical properties in La/Nd co-doped SrTiO3 ceramics

Pradhan, Jagabandhu; Nayak, R.L.; Sahoo, M.P.K.; Pattanaik, A. K.

doi:10.1016/j.jallcom.2021.160131

Cited by 6 publications

(1 citation statement)

References 61 publications

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“…Only a few attempts to dope the A-site of SrTiO 3 (STO) with Nd have been conducted so far. Pradhan et al reported that in the La 0.1 Sr 0.8– x Nd x TiO 3−δ system the solubility of Nd dopant is limited, i.e., doping with Nd at higher concentrations than x = 0.09 leads to the incorporation of Nd at Ti 4+ site, causing an unprecedented increase in the dielectric constant …”

Section: Introductionmentioning

confidence: 99%

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells

Paydar,

Kooser,

Volobujeva

et al. 2024

ACS Appl. Energy Mater.

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This study explores the impact of A-site deficiency and Sr/Ca ratio on the electrochemical and crystallographic properties of a (Nd 0.2 Sr 0.7−x Ca x ) y Ti 0.95 Fe 0.05 O 3−δ hydrogen electrode for solid oxide cells under reducing and air atmospheres. 5% and 10% A-site deficient (Nd 0.2 Sr 0.7−x Ca x ) y Ti 0.95 Fe 0.05 O 3−δ (x = 0.35−0.45, y = 1.05, 1) (referred to as 5NSCTF-x and 10NSCTF-x) materials were studied, while the ratio between A-site cations was kept the same with both deficiencies. The results demonstrate that the extent of A-site deficiency and the Ca concentration in the A-site have a significant impact on the microstructure (sinterability), conductivity, and catalytic activity of electrodes. Segregation of Nd from the lattice with 5% A-site deficiency was observed as a result of thermal treatment at low pO 2 . Among the studied materials, the highest total electrical conductivity of porous electrode layer at 850 °C and in 97% H 2 + 3% H 2 O atmosphere was 4.8 S cm −1 observed for the Nd 0.2 Sr 0.35 Ca 0.35 Ti 0.95 Fe 0.05 O 3−δ (10NSCTF-35). The highest electrochemical performance was observed in the case of Nd 0.2 Sr 0.25 Ca 0.45 Ti 0.95 Fe 0.05 O 3−δ (10NSCTF-45), which showed a polarization resistance value equal to 0.19 Ω cm 2 after 100 h of stabilization at 800 °C in a humidified (1.7% H 2 O) H 2 atmosphere. The best electrochemical performance with 606 mW cm −2 power density at 850 °C in 98.3% H 2 + 1.7% H 2 O atmosphere was demonstrated by a 50 wt % Nd 0.2 Sr 0.25 Ca 0.45 Ti 0.95 Fe 0.05 O 3−δ + 50 wt % Ce 0.9 Gd 0.1 O 2−δ composite.

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Section: Introductionmentioning

confidence: 99%

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells

Paydar,

Kooser,

Volobujeva

et al. 2024

ACS Appl. Energy Mater.

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The relationship between the defect structure and dielectric properties of (La, Li) co-doped SrTiO3

Wang,

Tan,

Wang

et al. 2024

J Mater Sci: Mater Electron

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Theoretical and experimental photocatalytic implications of Co ions upon the SrTiO3 lattice

et al. 2023

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Activating and modulating ferroelectric and optical properties in La/Nd co-doped SrTiO3 ceramics

Cited by 6 publications

References 61 publications

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells

The relationship between the defect structure and dielectric properties of (La, Li) co-doped SrTiO3

Theoretical and experimental photocatalytic implications of Co ions upon the SrTiO3 lattice

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Activating and modulating ferroelectric and optical properties in La/Nd co-doped SrTiO3 ceramics

Cited by 6 publications

References 61 publications

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd0.2Sr0.7–xCax)yTi0.95Fe0.05O3−δ-Based Fuel Electrode for Solid Oxide Cells

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd0.2Sr0.7–xCax)yTi0.95Fe0.05O3−δ-Based Fuel Electrode for Solid Oxide Cells

The relationship between the defect structure and dielectric properties of (La, Li) co-doped SrTiO3

Theoretical and experimental photocatalytic implications of Co ions upon the SrTiO3 lattice

Contact Info

Product

Resources

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Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells

Influence of A-Site Deficiency and Ca Concentration on the Electrical and Crystallographic Properties of (Nd_0.2Sr_0.7–xCa_x)_yTi_0.95Fe_0.05O_3−δ-Based Fuel Electrode for Solid Oxide Cells