Oxygen diffusion mechanism in the mixed ion-electron conductor NdBaCo2O5+x

Hu, Yang; Hernandez, Olivier; Broux, Thibault; Bahout, Mona; Hermet, Jessica; Ottochian, Alistar; Ritter, C.; Geneste, Grégory; Dezanneau, G.

doi:10.1039/c2jm34396g

Cited by 46 publications

(37 citation statements)

References 14 publications

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“…Therefore, it is possible to assume that, similar to the isostructural LnBaCo 2 O 6 (Ln = Pr, Nd, Sm, Gd) compounds, the oxygen vacancies are mainly located in LaO layers (Streule, Podlesnyak, Pomjakushina et al, 2006), while the O atoms located in CoO 2 layers facilitate the oxygen diffusion process. Recent studies of the diffusional pathway of O 2À ions in PrBaCo 2 O 6À (Chen et al, 2013) and NdBaCo 2 O 6À layered perovskites (Hu et al, 2012) by in situ neutron diffraction at temperatures higher than 873 K are consistent with our results.…”

Section: Room Temperature 673 Ksupporting

confidence: 92%

“…Therefore, significant structural information could be obtained by combining the two techniques, and this structural information could be related to O-ion and electron-hole transport. Thus, for example, the effects of oxygen vacancies on structures and the determination of the O-diffusion path in perovskites and related structures such as Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3À (McIntosh et al, 2006;Itoh et al, 2009Itoh et al, , 2010, SrFeO x (Schmidt & Campbell, 2002), NdBaCo 2 O 5+x (Hu et al, 2012), PrBaCo 2 O 5+ (Chen et al, 2013) and Sr 3 Fe(Fe,Co,Ni)O 6+ (Mogni et al, 2009) were studied from in situ neutron diffraction techniques.…”

Section: Introductionmentioning

confidence: 99%

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Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

et al. 2014

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A‐site cationic ordered LaBaCo2O6−δ and disordered La0.5Ba0.5CoO3−δ perovskite phases were obtained by solid state reaction. Their structural properties were studied at room temperature and 673 K, by combining powder diffraction techniques, X‐ray diffraction and neutron powder diffraction with an independent determination of the oxygen content of the samples by thermogravimetry. La0.5Ba0.5CoO3−δ exhibits cubic symmetry with cations randomly distributed, whereas LaBaCo2O6−δ shows tetragonal symmetry with the La3+ and Ba2+ ions distributed in alternating layers. The diffraction data were analyzed using the Rietveld method and different structural and microstructural models. Bond valence and Fourier methods were used to determine bond distances and neutron/electron density maps. LaBaCo2O6−δ exhibits a higher concentration of oxygen vacancies than La0.5Ba0.5CoO3−δ, because the O atom is weakly bonded to the LaO layers. The anisotropic atomic displacement and the neutron density distribution suggest a two‐dimensional O‐migration path for LaBaCo2O6−δ and a three‐dimensional path for La0.5Ba0.5CoO3−δ.The mechanism of electrical conductivity is via electron holes with high mobilities (μLa0.5Ba0.5CoO3−δ = 2.49 cm2 V−1 s−1 and μLaBaCo2O6−δ = 1.48 cm2 V−1 s−1 at room temperature) and low activation energy (EaLaBaCo2O6−δ = 0.019 eV and EaLa0.5Ba0.5CoO3−δ = 0.030 eV). It has also been found that the higher electronic and ionic conductivities in La0.5Ba0.5CoO3−δ compared to those in LaBaCo2O6−δ are due to the higher dimensionality of transport and to greater overlapping between the Co 3d and O 2p orbitals.

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Section: Room Temperature 673 Ksupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

et al. 2014

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“…Recently, a particular class of double perovskite manganites, LnBaMn2O5+ (Ln = lanthanide), in which the Ln 3+ and Ba 2+ cations order in alternating layers, have drawn considerable attention as electrode materials for SOFCs and SOECs as well as having potential as oxygen storage materials [5][6][7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Redox behavior of the SOFC electrode candidate NdBaMn₂O_5+δ investigated by high-temperature in situ neutron diffraction: first characterisation in real time of an LnBaMn₂O_5.5 intermediate phase

et al. 2016

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“…PBG enables PCs to manipulate photons, just as electronic bandgap makes semiconductor to control electrons. Due to their unique structures and properties, PCs show the great potentials in display devices, 1 eco-friendly printings and paintings, 2 anti-counterfeiting technologies, 3,4 chemical and biological sensors. 5 The fabrication of PCs can be divided into "up-to-bottom" 6 and "bottom-to-up".…”

Section: Introductionmentioning

confidence: 99%

Amphiphilic copolymer self-assembly of magnetic nanoparticles for construction of magnetically responsive photonic crystals based on steric hindrance

Shang

et al. 2019

RSC Adv.

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Herein, a facile, simple and rapid self-assembly of magnetic colloidal nanoparticles (MCNPs) to build magnetically responsive photonic crystals (MRPCs) was devolved. A nonionic amphiphilic random copolymer poly(styrene-co-vinylpyrrolidone) P(St-co-VP) with the monomer molar ratio of 1 : 9 was used not only as an emulsifier for miniemulsion self-assembly of Fe 3 O 4 magnetic nanoclusters, but also as the coating material on the magnetic nanoclusters through itself assembly. The self-assembly of the magnetic nanocluster and the polymer coating were completed simultaneously without another polymerization process. The characterization of the MCNPs and the optical properties of the MRPCs were investigated in details. TEM showed that the MCNPs had regular spherical structures with an average diameter of 104.6 nm (RSD ¼ 13.9%, n ¼ 100). P(St-co-VP) self-assembly coating was confirmed by IR and XPS, and thermogravimetric analysis showed that the magnetite content was 76.15%. The large content of magnetite and the thin coating of the copolymer gave MCNPs the high saturated magnetization (M s ) of 52.60 emu g À1 . Under an external magnetic field, the MCNPs could assemble MRPCs instantaneously and reversibly. The structural color covered entire visible spectrum by tuning the strength of the external magnetic field. On basis of the steric hindrance from neighboring PVP stretching chains, rather than electrostatic repulsion or solvation layer to counterbalance magnetic attraction, the MRPCs could tolerate the electrolyte as high as 0.10 mol L À1 and the variance of pH from 2.0-12.0. The stability of P(St-co-VP) self-assembly coating was testified through the invariability of the structural color of MRPCs after repeated washing, as well as the recovery of structural color after removing the electrolytes.

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Oxygen diffusion mechanism in the mixed ion-electron conductor NdBaCo2O5+x

Cited by 46 publications

References 14 publications

Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

Redox behavior of the SOFC electrode candidate NdBaMn₂O_5+δ investigated by high-temperature in situ neutron diffraction: first characterisation in real time of an LnBaMn₂O_5.5 intermediate phase

Amphiphilic copolymer self-assembly of magnetic nanoparticles for construction of magnetically responsive photonic crystals based on steric hindrance

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Oxygen diffusion mechanism in the mixed ion-electron conductor NdBaCo2O5+x

Cited by 46 publications

References 14 publications

Effect of cationic order–disorder on the transport properties of LaBaCo2O6–δand La0.5Ba0.5CoO3–δperovskites

Effect of cationic order–disorder on the transport properties of LaBaCo2O6–δand La0.5Ba0.5CoO3–δperovskites

Redox behavior of the SOFC electrode candidate NdBaMn2O5+δ investigated by high-temperature in situ neutron diffraction: first characterisation in real time of an LnBaMn2O5.5 intermediate phase

Amphiphilic copolymer self-assembly of magnetic nanoparticles for construction of magnetically responsive photonic crystals based on steric hindrance

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Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

Effect of cationic order–disorder on the transport properties of LaBaCo₂O_6–δand La_0.5Ba_0.5CoO_3–δperovskites

Redox behavior of the SOFC electrode candidate NdBaMn₂O_5+δ investigated by high-temperature in situ neutron diffraction: first characterisation in real time of an LnBaMn₂O_5.5 intermediate phase