Influence of Cr substitution on structural, magnetic and electrical conductivity spectra of LaFeO3

Selvadurai, A. Paul Blessington; Pazhanivelu, V.; Jagadeeshwaran, C.; Murugaraj, R.; Muthuselvam, I. Panneer; Chou, F. C.

doi:10.1016/j.jallcom.2015.05.213

Cited by 98 publications

(35 citation statements)

References 57 publications

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“…The single peak represents paramagnetism attributed to small‐sized Cr clusters formed due to antisite defects, while the hexamodal peak represents antiferromagnetism mainly due to Fe clusters in the form of Fe 3+ –O–Fe 3+ . [ 25 ] These findings agree with the EDX results. Table 2 presents the fitted parameters.…”

Section: Resultssupporting

confidence: 89%

Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

Yang

Cao

et al. 2023

Physica Status Solidi (b)

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The synthesis of REFe0.5Cr0.5O3 (RE = La, Y) using the sol–gel method is focused and their structural differences are investigated. The results of X‐ray diffraction show that the change of ion radius at position A leads to varying degrees of octahedral distortion and spatial group structure. The scanning electron microscopy analysis reveals micron‐level particles with clear boundaries, while energy‐dispersive X‐ray spectroscopy and room temperature Mössbauer spectra indicate the presence of Fe/Cr clusters in the sample and the transitional valence of iron. Disorder in the B position leads to a saturation moment that is lower than the theoretical value. The thermomagnetic profile shows a reversal of magnetization due to the interaction between the single‐ion magnetic anisotropy and the antisymmetric Dzyaloshinskii–Moriya (DM) interaction, with a broader peak is observed due to cluster formation. The difference in negative magnetic field is due to the difference in net magnetic moment caused by different DM intensities.

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Section: Resultssupporting

confidence: 89%

Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

Yang

Cao

et al. 2023

Physica Status Solidi (b)

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“…The main composition of interest is LaFe 0.5 Cr 0.5 O 3 as the conductivity reaches a maximum. 72 This composition also displays excellent oxygen evaluation reaction (OER) performance. 73 The addition of manganese, La-Fe 1−x Mn x O 3 , drives a disorder induced localization of charge carriers.…”

Section: Structure Properties Of Lafeo 3 and Its Related Materialsmentioning

confidence: 98%

“…These compositions crystallize in the orthorhombic space group Pbnm . The main composition of interest is LaFe 0.5 Cr 0.5 O 3 as the conductivity reaches a maximum . This composition also displays excellent oxygen evaluation reaction (OER) performance .…”

Section: Structure Properties Of Lafeo3 and Its Related Materialsmentioning

confidence: 99%

A Review on Perovskite-Type LaFeO₃ Based Electrodes for CO₂ Reduction in Solid Oxide Electrolysis Cells: Current Understanding of Structure–Functional Property Relationships

et al. 2021

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Mixed ionic and electronic conductors (MIECs) are being studied extensively as a potential replacement for cermet catalysts in solid oxide cells (SOCs)collectively named for solid oxide fuel cells and solid oxide electrolysis cellsdue to their high activity, great stability, and low cost. Perovskite-type LaFeO3-based catalysts are one of the most promising electrodes for SOCs. This review paper provides an update on the chemical composition–crystal structure–physical property relationships and an understanding of the electrochemical reaction mechanisms in the perovskite-type structure LaFeO3 electrodes. Mechanisms for electrochemical CO2 reduction on the perovskite structure surface and oxygen diffusion are discussed. Furthermore, the electrochemical performance enhancement strategies such as composite electrodes and nanoparticles ex-solution are briefly presented together with industrialization issues, e.g., gas impurities and stability of the interconnecting materials.

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“…The diffraction peak of LaFeO 3 (x = 0) corresponds to the standard cubic spinel LaFeO 3 (PDF# 75-0541). Nevertheless, as the concentration of Cr increased, the characteristic peaks gradually shifts to the body-centered tetragonal spinel structure of LaCrO 3 (PDF #75-0441) 21 . The morphology of the as-prepared LaCr 0.5 Fe 0.5 O 3 was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) as presented in Figure S2 (Supporting Information) and Fig.…”

Section: Resultsmentioning

confidence: 99%

High efficiency electrocatalyst of LaCr0.5Fe0.5O3 nanoparticles on oxygen-evolution reaction

Gao

Sun²,

Ran

et al. 2020

Sci Rep

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Due to the multistep proton-coupled electron transfer, it remains a huge challenge to accelerate the kinetics of oxygen evolution reaction (OER). Here, we demonstrate that perovskite-type LaCr 0.5 Fe 0.5 O 3 nanoparticles can be used as highly active and stable OER electrocatalysts, where it shows a low overpotential of 390 mV at 10 mA/cm 2 , a small Tafel slope of 114.4 mV/dec and excellent stability with slight current decrease after 20 h, superior than that of their individual counterparts (LaFeO 3 and LaCrO 3 ). This finding confirms that the present hybrid material would be an effective means to electrocatalyst for catalyzing OER.

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Influence of Cr substitution on structural, magnetic and electrical conductivity spectra of LaFeO3

Cited by 98 publications

References 57 publications

Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

A Review on Perovskite-Type LaFeO₃ Based Electrodes for CO₂ Reduction in Solid Oxide Electrolysis Cells: Current Understanding of Structure–Functional Property Relationships

High efficiency electrocatalyst of LaCr0.5Fe0.5O3 nanoparticles on oxygen-evolution reaction

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Influence of Cr substitution on structural, magnetic and electrical conductivity spectra of LaFeO3

Cited by 98 publications

References 57 publications

Mössbauer and Magnetic Properties Investigation of REFe0.5Cr0.5O3 (RE=La, Y) Perovskite

Mössbauer and Magnetic Properties Investigation of REFe0.5Cr0.5O3 (RE=La, Y) Perovskite

A Review on Perovskite-Type LaFeO3 Based Electrodes for CO2 Reduction in Solid Oxide Electrolysis Cells: Current Understanding of Structure–Functional Property Relationships

High efficiency electrocatalyst of LaCr0.5Fe0.5O3 nanoparticles on oxygen-evolution reaction

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Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

Mössbauer and Magnetic Properties Investigation of REFe_0.5Cr_0.5O₃ (RE=La, Y) Perovskite

A Review on Perovskite-Type LaFeO₃ Based Electrodes for CO₂ Reduction in Solid Oxide Electrolysis Cells: Current Understanding of Structure–Functional Property Relationships