Preparation and gas-sensing properties of perovskite-type SrFeO3 oxide

Wang, Yude; Wu, Xinghui

doi:10.1016/s0167-577x(00)00400-6

Cited by 109 publications

(44 citation statements)

References 6 publications

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“…This modification is typically accomplished by chemical substitution with transition metals and the promotion of defects (i.e. vacancy in the structure) [15,16].…”

Section: Introductionmentioning

confidence: 99%

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Fuentes

Muñoz

Barraza

et al. 2015

J Sol-Gel Sci Technol

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A detailed structural study of the incorporation of Fe into SrTiO 3 nanoparticles is reported. Slightly irondoped strontium titanate nanoparticles with 0, 1, 3 and 5 mol% concentration of iron were grown using a sol-gel hydrothermal process and characterised using Raman scattering, X-ray photoelectron and X-ray diffraction spectroscopy. The amorphisation of the nanostructures was observed as the iron content increased, which was confirmed by the TEM images. The XPS results indicated that the oxidation states of the Sr atoms were maintained in 2?. However, a mixture of Fe 3? and Fe 4? atoms was observed as the Fe content increased, resulting in a significant number of oxygen vacancies in the perovskite structure. The analysis of Raman spectra indicated that the intensity, linewidth and frequency shift of the TO 4 phonon can be used as an indicator of the Fe content as well as a local temperature probe for future thermal analysis. Graphical abstract Temperature evolution of the Raman spectra of STO:Fe 1 mol%. The peaks with star correspond to the second-order processes. (b) Temperature dependence of the TO 4 phonon mode. Blue dots denote measured Raman spectra, and the red solid lines are the Lorentzian fits to respective spectra.

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“…This modification is typically accomplished by chemical substitution with transition metals and the promotion of defects (i.e. vacancy in the structure) [15,16].…”

Section: Introductionmentioning

confidence: 99%

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Fuentes

Muñoz

Barraza

et al. 2015

J Sol-Gel Sci Technol

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“…400 K) with CaH 2 . The residual CaH 2 and the CaO byproduct were washed out with an NH 4 Cl/methanol solution. The key for the preparation of this oxide was the use of a hydride of an electropositive metal (CaH 2 ) as powerful reducing agent, which is active at considerably lower temperatures than when conventional techniques are used.…”

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confidence: 99%

Square‐Planar Coordinated Iron in the Layered Oxoferrate(II) SrFeO₂

Köhler

2008

Angew Chem Int Ed

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A soft reduction: The new layered oxoferrate(II) SrFeO2 (see scheme: Fe red, Sr yellow, C gray) was synthesized by the reduction of the slightly oxygen‐deficient perovskite SrFeO3−x at 400 K with CaH2 in a form of topotactical reaction. The square‐planar‐coordinated iron(II) ions in SrFeO2 exhibit a high‐spin d6 configuration with a doubly occupied d italicz 2 orbital. SrFeO2 orders antiferromagnetically at an unusual high Néel temperature of TN=473 K.

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“…For example, Mukasyan et al [21] reported that a variety of ABO 3 /Pt compositions with Ru at B-site exhibit comparable performance with Pt-Ru alloy. It is a major constituent of many new materials exhibiting high oxygen-ionic and electronic conductivity [22,23], which have great potential for use in high-temperature oxygen-permeable membranes, electrodes for oxygen sensors, oxygen pumps, fuel cells, solid-electrolyte devices [24], redox behavior [25], and gas-sensing properties [26,27]. The stoichiometrically compositional SrFeO 3 has a simple cubic perovskite structure (a = 3.85 A°) [28,29].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional catalysts toward methanol oxidation in direct methanol fuel cell

2015

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In the current study, a nanoscale perovskite SrFeO 3 (SrFNPs) was synthesized by a rapid microwave-assisted co-precipitation method and characterized by X-ray diffraction, Fourier transform-infrared spectroscopy, scanning electron microscopy, Energy dispersive X-ray, and vibrating sample magnetometer techniques. Modified glassy carbon electrode with Pt nanoparticles (PtNPs), functionalized carbon nanotubes (CNTs), and SrFNPs as multifunctional catalyst is prepared and its catalytic activity toward methanol oxidation is investigated. Based on the electrochemical studies, a PtNPs-CNTs-SrFNPs nanocomposite was shown a considerable activity for methanol oxidation in comparison of PtNPs, PtNPs-CNTs, and PtNPs-SrFNPs. A direct methanol fuel cell was designed, assembled, and tested with suggested PtNPs-CNTs-SrFNPs nanocomposites under several different conditions. The effect of some experimental factors such as temperature, methanol concentration, and flow rate as well as NaOH concentration on electrical performances of fuel cell were studied and optimized.

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Preparation and gas-sensing properties of perovskite-type SrFeO3 oxide

Cited by 109 publications

References 6 publications

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Square‐Planar Coordinated Iron in the Layered Oxoferrate(II) SrFeO₂

Multifunctional catalysts toward methanol oxidation in direct methanol fuel cell

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Preparation and gas-sensing properties of perovskite-type SrFeO3 oxide

Cited by 109 publications

References 6 publications

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Structural characterisation of slightly Fe-doped SrTiO3 grown via a sol–gel hydrothermal synthesis

Square‐Planar Coordinated Iron in the Layered Oxoferrate(II) SrFeO2

Multifunctional catalysts toward methanol oxidation in direct methanol fuel cell

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Square‐Planar Coordinated Iron in the Layered Oxoferrate(II) SrFeO₂