Oxygen nonstoichiometry, defect structure and defect-induced expansion of undoped perovskite LaMnO3±δ

Zuev, A. Yu.; Цветков, Д. С.

doi:10.1016/j.ssi.2010.02.024

Cited by 64 publications

(51 citation statements)

References 14 publications

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“…This excess oxygen in LSM gives rise to the formation of cation vacancies, which is thermodynamically unfavorable in the LaMnO 3 perovskite structure. [12,13] Thec ation vacancies would cause the disintegration of LSM and the formation of cation oxides or LSM nanoparticles.I tr esults in degradation and delamination due to severe microstructural damage near the air electrode/electrolyte interface. [14,15] Recently,one group found that reversible cycling between electrolysis and fuel-cell modes can eliminate severe electrolysis-induced degradation.…”

Section: Inrecentyearstherehavebeenincreasingdemandsforcleanmentioning

confidence: 99%

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

et al. 2016

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Recently, there have been efforts to use clean and renewable energy because of finite fossil fuels and environmental problems. Owing to the site-specific and weather-dependent characteristics of the renewable energy supply, solid oxide electrolysis cells (SOECs) have received considerable attention to store energy as hydrogen. Conventional SOECs use Ni-YSZ (yttria-stabilized zirconia) and LSM (strontium-doped lanthanum manganites)-YSZ as electrodes. These electrodes, however, suffer from redox-instability and coarsening of the Ni electrode along with delamination of the LSM electrode during steam electrolysis. In this study, we successfully design and fabricate highly efficient SOECs using layered perovskites, PrBaMn2 O5+δ (PBM) and PrBa0.5 Sr0.5 Co1.5 Fe0.5 O5+δ (PBSCF50), as both electrodes for the first time. The SOEC with layered perovskites as both-side electrodes shows outstanding performance, reversible cycling, and remarkable stability over 600 hours.

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Section: Inrecentyearstherehavebeenincreasingdemandsforcleanmentioning

confidence: 99%

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

et al. 2016

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“…LSM exhibits apparent oxygen excess nonstoichiometry in an oxidation environment. This excess oxygen in LSM gives rise to the formation of cation vacancies, which is thermodynamically unfavorable in the LaMnO 3 perovskite structure . The cation vacancies would cause the disintegration of LSM and the formation of cation oxides or LSM nanoparticles.…”

Section: Figurementioning

confidence: 99%

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

et al. 2016

View full text Add to dashboard Cite

Recently,t here have been efforts to use clean and renewable energy because of finite fossil fuels and environmental problems.O wing to the site-specific and weatherdependent characteristics of the renewable energy supply,solid oxide electrolysis cells (SOECs) have received considerable attention to store energy as hydrogen. Conventional SOECs use Ni-YSZ (yttria-stabilized zirconia) and LSM (strontiumdoped lanthanum manganites)-YSZ as electrodes.T hese electrodes,however,suffer from redox-instability and coarsening of the Ni electrode along with delamination of the LSM electrode during steam electrolysis.I nt his study,w es uccessfully design and fabricate highly efficient SOECs using layered perovskites,P rBaMn 2 O 5+d (PBM) and PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+d (PBSCF50), as both electrodes for the first time.The SOEC with layered perovskites as both-side electrodes shows outstanding performance,r eversible cycling, and remarkable stability over 600 hours.Supportinginformation for this article can be found under: http://dx.

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“…), have been widely studied for their important applications as catalysts, thermoelectric compounds, cathodes for solid-oxide fuel-cells, and gas sensors [9][10][11][12]. Several investigations have shown that the presence of cobalt ions, with different oxidation states, plays an important role in the transport properties and catalytic activity of perovskites [13,14]. Furthermore, the ability to modify their microstructures, such as porosity, distribution, shape, and particle size can induce changes in their physical properties [15,16].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis, Microstructure, and Gas Sensing Properties of NdCoO₃ Nanoparticles

Gildo-Ortiz

Guillén-Bonilla

Reyes-Gómez

et al. 2017

Journal of Nanomaterials

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NdCoO 3 nanoparticles were successfully synthesized by a simple, inexpensive, and reproducible solution method for gas sensing applications. Cobalt nitrate, neodymium nitrate, and ethylenediamine were used as precursors and distilled water as solvent. The solvent was evaporated later by means of noncontinuous microwave radiation at 290 W. The obtained precursor powders were calcined at 200, 500, 600, and 700 ∘ C in a standard atmosphere. The oxide crystallized in an orthorhombic crystal system with space group Pnma (62) and cell parameters = 5.33Å, = 7.52Å, and = 5.34Å. The nanoparticles showed a diffusional growth to form a network-like structure and porous adsorption configuration. Pellets prepared from NdCoO 3 were tested as gas sensors in atmospheres of carbon monoxide and propane at different temperatures. The oxide nanoparticles were clearly sensitive to changes in gas concentrations (0-300 ppm). The sensitivity increased with increasing concentration of the gases and operating temperatures (25, 100, 200, and 300 ∘ C).

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Oxygen nonstoichiometry, defect structure and defect-induced expansion of undoped perovskite LaMnO3±δ

Cited by 64 publications

References 14 publications

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Facile Synthesis, Microstructure, and Gas Sensing Properties of NdCoO₃ Nanoparticles

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Oxygen nonstoichiometry, defect structure and defect-induced expansion of undoped perovskite LaMnO3±δ

Cited by 64 publications

References 14 publications

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Achieving High Efficiency and Eliminating Degradation in Solid Oxide Electrochemical Cells Using High Oxygen‐Capacity Perovskite

Facile Synthesis, Microstructure, and Gas Sensing Properties of NdCoO3 Nanoparticles

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Facile Synthesis, Microstructure, and Gas Sensing Properties of NdCoO₃ Nanoparticles