Effect of calcination temperature on the structural characteristics and catalytic activity for propene combustion of sol–gel derived lanthanum chromite perovskite

Rida, Kamel; Benabbas, A.; Bouremmad, Farida; Peña, M.A.; Sastre, Enrique; Martı́nez-Arias, A.

doi:10.1016/j.apcata.2007.05.015

Cited by 109 publications

(66 citation statements)

References 38 publications

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“…No peak due to Fe 2+ can be found, which confirms that oxidation state of Fe is 3+ in LaFeO 3 nanostructure thin films. 36 The two O 1s XPS spectra in Figure 6d are wide and asymmetric, 37 The binding energy of OL XPS signal can be attributed to the contribution of La−O and Fe−O in LaFeO 3 crystal lattice. From the relative intensities of the XPS spectrum, the compositional stoichiometry was calculated between La, Fe, and O, and it was found to be 1:1:3.…”

Section: Methodsmentioning

confidence: 98%

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Thirumalairajan

Girija

Mastelaro

et al. 2014

ACS Appl. Mater. Interfaces

134

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In the present work, perovskite LaFeO 3 thin films with unique morphology were obtained on silicon substrate using radio frequency magnetron sputtering technique. The effect of thickness and temperature on the morphological and structural properties of LaFeO 3 films was systematically studied. The X-ray diffraction pattern explored the highly oriented orthorhombic perovskite phase of the prepared thin films along [121]. Electron micrograph images exposed the network and nanocube surface morphology of LaFeO 3 thin films with average sizes of ∼90 and 70 nm, respectively. The developed LaFeO 3 thin films not only possess unique morphology, but also influence the gas-sensing performance toward NO 2 . Among the two morphologies, nanocubes exhibited high sensitivity, good selectivity, fast response−recovery time, and excellent repeatability for 1 ppm level of NO 2 gas at room temperature. The response time for nanocubes was 24−11 s with a recovery duration of 35−15 s less than the network structure. The sensitivity toward NO 2 detection was found to be in the range 29.60−157.89. The enhancement in gassensing properties is attributed to their porous structure, surface morphology, numerous surface active sites, and the oxygen vacancies. The gas-sensing measurements demonstrate that the LaFeO 3 sensing material is an outstanding candidate for NO 2 detection.

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Section: Methodsmentioning

confidence: 98%

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Thirumalairajan

Girija

Mastelaro

et al. 2014

ACS Appl. Mater. Interfaces

134

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“…3). This latter endothermic peak attributable to the formation of the oxide was also found for LaCrO 3 synthesized through the sol-gel route [24,25].…”

Section: Characterization Techniquesmentioning

confidence: 84%

Synthesis and Electrochemical Properties of LaCr1−xCoxO3 (0 ≤ x ≤ 0.5) via Co-precipitation Method

Madoui

Omari

2016

J Inorg Organomet Polym

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Perovskite LaCr 1-x Co x O 3 (0 B x B 0.5) oxides synthesized by co precipitation method were investigated. X-ray diffraction, thermo gravimetric and differential thermal analysis, Fourier transform infrared spectroscopy, scanning electron microscopy (SEM) and electrochemical measurements, were used to characterize the structure, morphology, electrochemical properties of the samples. The studied compounds have orthorhombic and rhombohedral systems in the ranges (0 B x B 0.2) and (0.3 B x B 0.5) respectively. Thermal analysis results indicate that the pure phase was obtained at temperature above 800°C. The structure and morphology of the samples characterized by SEM measurements indicate that particles have nearly spherical shapes and are agglomerated. The electrochemical measurements indicate that the catalytic activity is strongly influenced by cobalt doping. The highest electrode performance is achieved with large cobalt content.

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“…In case of LaFeO 3 perovskite, it has been proved that a small amounts of Fe 3+ ions in the perovskite structure can be oxidized to Fe 4+ ions during the calcination process at high temperatures. 21,22 The oxidation of Fe 3+ to Fe 4+ can induce a liberation of lanthanum ions from the perovskite lattice, based on the principle of controlled valency. The resulting lanthanum oxide should be related to the nature and reactivity of the perovskite surface.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Porous LaFeO₃Nanowires using AAO Template and Their Catalytic Properties

Ryu¹,

Im²,

Wang³

et al. 2011

Bulletin of the Korean Chemical Society

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Effect of calcination temperature on the structural characteristics and catalytic activity for propene combustion of sol–gel derived lanthanum chromite perovskite

Cited by 109 publications

References 38 publications

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Synthesis and Electrochemical Properties of LaCr1−xCoxO3 (0 ≤ x ≤ 0.5) via Co-precipitation Method

Preparation of Porous LaFeO₃Nanowires using AAO Template and Their Catalytic Properties

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Effect of calcination temperature on the structural characteristics and catalytic activity for propene combustion of sol–gel derived lanthanum chromite perovskite

Cited by 109 publications

References 38 publications

Surface Morphology-Dependent Room-Temperature LaFeO3 Nanostructure Thin Films as Selective NO2 Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Surface Morphology-Dependent Room-Temperature LaFeO3 Nanostructure Thin Films as Selective NO2 Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Synthesis and Electrochemical Properties of LaCr1−xCoxO3 (0 ≤ x ≤ 0.5) via Co-precipitation Method

Preparation of Porous LaFeO3Nanowires using AAO Template and Their Catalytic Properties

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Product

Resources

About

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Surface Morphology-Dependent Room-Temperature LaFeO₃ Nanostructure Thin Films as Selective NO₂ Gas Sensor Prepared by Radio Frequency Magnetron Sputtering

Preparation of Porous LaFeO₃Nanowires using AAO Template and Their Catalytic Properties