Structural, magnetic and electrical analysis of La1−x Nd x CrO3 (0.00 &lt; x &lt; 0.15): synthesised by sol–gel citrate combustion method

Selvadurai, A. Paul Blessington; Pazhanivelu, V.; Jagadeeshwaran, C.; Murugaraj, R.; Muthuselvam, I. Panneer; Chou, F. C.; Gazzali, P. M. Mohammed; Chandrasekaran, G.

doi:10.1007/s10971-016-4151-8

Cited by 18 publications

(4 citation statements)

References 54 publications

(70 reference statements)

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“…The observed type IV isotherm hysteresis indicates the formation of a mesoporous network in the MP catalyst‐coated LSCF. [ 52–54 ] The hysteresis for the MP catalyst‐coated LSCF starts at a lower P / P 0 value as compared with that of the bare LSCF, indicating the presence of micropores in the MP catalyst‐coated LSCF. The corresponding pore‐size distribution calculated by the Barret–Joyner–Halenda (BJH) method using the desorption branch is shown in the inset of Figure S2d, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Niu

Zhou

et al. 2021

Adv Funct Materials

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Intermediate temperature solid oxide fuel cells (IT‐SOFCs) are cost‐effective and efficient energy conversion systems. The sluggish oxygen reduction reaction (ORR) and the degradation of cathodes are critical challenges to the commercialization of IT‐SOFCs. Here, a highly efficient multiphase (MP) catalyst coating, consisting of Ba1−xCo0.7Fe0.2Nb0.1O3−δ (BCFN) and BaCO3, to enhance the ORR activity and durability of the state‐of‐the‐art lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3−δ, LSCF) cathode is reported. The conformal MP catalyst‐coated LSCF cathode shows a polarization resistance (Rp) of 0.048 Ω cm2 at 650 °C, about one order of magnitude smaller than that of the bare LSCF. In an accelerated Cr‐poisoning test, the degradation rate of the catalyst‐coated LSCF electrode is 10−3 Ω cm2 h−1 (0.59% h−1) over 200 h, only one fifth of the degradation rate of the bare LSCF electrode at 750 °C. In addition, anode‐supported single cells with the MP catalyst‐coated LSCF cathode show a dramatically enhanced peak power density (1.4 W cm−2 vs 0.67 W cm−2 at 750 °C) and increased durability against Cr and H2O. Both experimental results and density functional theory‐based calculations indicate that the BCFN phase improves the ORR activity while the BaCO3 phase enhances the stability of the LSCF cathode.

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Section: Resultsmentioning

confidence: 99%

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Niu

Zhou

et al. 2021

Adv Funct Materials

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“…et al reported that when Cr replaces some Fe, small paramagnetic Cr clusters are generated due to size effects. [ 20 ] The formation of clusters piqued our interest. However, S. V. Trukhanov et al [ 21 ] reported the effects of different magnetic RE ions on the overall magnetic properties of the structure.…”

Section: Introductionmentioning

confidence: 99%

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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“…Perovskite rare-earth chromites with the general formula RCrO 3 comprise an important class of multiferoic materials [1][2][3][4] that exhibit an astonishing variety of physical properties including electric, dielectric, magnetic, magneto-caloric, optic properties and so on. As a result, in the past several years, they have been fully investigated due to the promising potentials of applications such as insultor-metal transition [5], fuel cells (SOFC) [6], magnetocaloric materials [7], oxygen sensors [8], dielectrics [9], optic-magneto devices [10]..... Several factors like the ionic size of the R 3+ rare earth, the atomic valency of Cr-ions [11], Jahn Teller distortion [12] and the exchange between the d-orbitals of the B transition metal cation and the 2p-orbitals of oxygen anions [13][14] profoundly influence the electric, magnetic and other properties of these materials. Furthermore, these properties and the spin state of Cr ions can be controlled by a partial substitution either in R or/and Cr cation sites [13,15,16] which introduces a remarkable lattice distortion leading to various defects in the structure [17,18].…”

Section: Introductionmentioning

confidence: 99%

Physical properties of Nano Crystalline Ceramic HoBaCrO

Youssef

Sdiri²,

Horchani−Naifer³

et al. 2019

Ceramics International

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Structural, magnetic and electrical analysis of La1−x Nd x CrO3 (0.00 < x < 0.15): synthesised by sol–gel citrate combustion method

Cited by 18 publications

References 54 publications

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

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

Physical properties of Nano Crystalline Ceramic HoBaCrO

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Structural, magnetic and electrical analysis of La1−x Nd x CrO3 (0.00 < x < 0.15): synthesised by sol–gel citrate combustion method

Cited by 18 publications

References 54 publications

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

Enhancing Oxygen Reduction Activity and Cr Tolerance of Solid Oxide Fuel Cell Cathodes by a Multiphase Catalyst Coating

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

Physical properties of Nano Crystalline Ceramic HoBaCrO

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