Oxygen sorption and catalytic properties of La1$minus;xSrxCo1$minus;yFeyO3 Perovskite-type oxides

Zhang, H.M.; Shimizu, Youichi; Teraoka, Yasutake; Miura, Norio; Yamazoe, N.

doi:10.1016/0021-9517(90)90251-e

Cited by 233 publications

(36 citation statements)

References 7 publications

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“…As a compromise between the oxygen ionic conductivity and chemical stability, Fe appears to be the best choice for the B-site cation. Moreover, a mild cobalt substitution on the iron-rich B site also substantially increased the amount of oxygen desorption (Zhang et al, 1990). In the present work, different amounts and types of aliovalent cations (Ca2+, Sr2+, Ba2+ 1 were partially substituted for the La3+ in a LaFeo~,Coo,,O,~, perovskite framework to attain the desired properties of high 0, flux and stability under reducing conditions.…”

Section: Introductionmentioning

confidence: 78%

Dense perovskite membrane reactors for partial oxidation of methane to syngas

et al. 1997

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Section: Introductionmentioning

confidence: 78%

Dense perovskite membrane reactors for partial oxidation of methane to syngas

et al. 1997

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“…Figure 1b shows the theoretical bulk oxygen nonstoichiometries, d red, theory ,a safunction of x Sr and y Al .N otably, d red, theory is equivalent to the concentration of oxygen vacancies required to maintain electroneutrality,a ssuming that Mn does not change its + 3o xidations tate. [14,21,36,42,[49][50][51][52] For example, LSMA8282 and LSMA2882 reach d red, measured = 0.034 (d red, theory = 0.1) and d red, measured = 0.351 (d red, theory = 0.4), respectively,w hereas LSMA6464a nd LSMA6446 reach d red, measured = 0.171 (d red, theory = 0.2) and d red, measured = 0.134 (d red, theory = 0.2), respectively.Acomplete list of d red, measured is provided in Table S1. That is, increasing x Sr at constant y Al increases oxygen non-stoichiometries, whereas varying y Al at constant x Sr does not significantly change oxygen non-stoichiometries.…”

Section: Characterization Of Perovskite Redox Materialsmentioning

confidence: 99%

“…This is in agreement with the literature. [14,21,36,42,[49][50][51][52] For example, LSMA8282 and LSMA2882 reach d red, measured = 0.034 (d red, theory = 0.1) and d red, measured = 0.351 (d red, theory = 0.4), respectively,w hereas LSMA6464a nd LSMA6446 reach d red, measured = 0.171 (d red, theory = 0.2) and d red, measured = 0.134 (d red, theory = 0.2), respectively.Acomplete list of d red, measured is provided in Table S1. Demont et al [50] examinedt he reduction extent of several Al-freeL SM compositions andconcluded that increasing reduction extent with increasing x Sr is owed to an increased Mn oxidation state.…”

Section: Trends In the Oxygen Exchange Capacitymentioning

confidence: 99%

High Redox Capacity of Al‐Doped La_1−xSr_xMnO_3−δ Perovskites for Splitting CO₂ and H₂O at Mn‐Enriched Surfaces

et al. 2017

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Perovskites are attractive candidates for the solar-driven thermochemical redox splitting of CO and H O into CO and H (syngas) and O . This work investigates the surface activity of La Sr Mn Al O (0≤x≤1, 0≤y≤1) and La Ca Mn Al O . At 1623 K and 15 mbar O , the oxygen non-stoichiometry of La Sr Mn Al O increases with the strontium content and reaches a maximum of δ=0.351. X-ray photoelectron spectroscopy analysis indicates that manganese is the only redox-active metal at the surface. All La Sr Mn Al O compositions exhibit surfaces enriched in manganese and depleted in strontium. We discuss how these compositional differences of the surface from the bulk lead to the beneficially higher reduction extents and lower strontium carbonate concentrations at the aluminum-doped surfaces. Using first principles calculations, we validate the experimental reduction trends and elucidate the mechanism of the partial electronic charge redistribution upon perovskite reduction.

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“…The combustion results indicated that the SA of the rare earth manganites was between 13 and 40 m 2 /g. Zhang et al 211 have suggested that the existence of high valence state cations is useful for desorption of O 2 at low temperatures. Due to the great progress in nanotechnology, materials with very well defined porosity provide a whole new strategy for the textural structures of perovskites.…”

Section: Porous Perovskite Oxidesmentioning

confidence: 99%

Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

Başhan

Üst

2019

Int J Energy Res

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Summary This review underlines the importance of the developments in perovskite catalysts for methane combustion from the past up to the present. In this review, after a general and brief introduction to perovskites, the mechanisms of catalytic combustion of methane have been included. Moreover, current studies on perovskites have been summarized including the effects of substitutions, doped perovskites, perovskite preparation methods, and the effect of sulfur presence on perovskite catalysts. Besides, recent studies on perovskite oxides and phenomenon of oxygen (O2) deficiency, porous perovskite oxides, and nanostructured perovskites have been conducted. In addition, partial oxidation of methane (POM) has been reviewed. The loss of active component during the POM reaction can take place in the nickel catalyst, in particular. Since nickel has a lower melting point than noble metals and other active components, such as Co and Fe, in general, to deactivate nickel is easier. Compared with conventional structure, the porous structure with the unique morphology significantly enhances the catalytic activity through a much larger surface area (SA) and greater reactivity of the active sites. Furthermore, the monolithic nanoarrayed perovskite presents very good results in well‐defined faceted catalysts and takes part in porous channel hydrocarbon combustion. This review study is prepared as a guide to cover the profound knowledge of perovskite oxides catalysts, considering the methane combustion reaction mechanisms, and addresses prospective studies in this field for researchers.

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Oxygen sorption and catalytic properties of La1$minus;xSrxCo1$minus;yFeyO3 Perovskite-type oxides

Cited by 233 publications

References 7 publications

Dense perovskite membrane reactors for partial oxidation of methane to syngas

Dense perovskite membrane reactors for partial oxidation of methane to syngas

High Redox Capacity of Al‐Doped La_1−xSr_xMnO_3−δ Perovskites for Splitting CO₂ and H₂O at Mn‐Enriched Surfaces

Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

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Oxygen sorption and catalytic properties of La1$minus;xSrxCo1$minus;yFeyO3 Perovskite-type oxides

Cited by 233 publications

References 7 publications

Dense perovskite membrane reactors for partial oxidation of methane to syngas

Dense perovskite membrane reactors for partial oxidation of methane to syngas

High Redox Capacity of Al‐Doped La1−xSrxMnO3−δ Perovskites for Splitting CO2 and H2O at Mn‐Enriched Surfaces

Perovskite catalysts for methane combustion: applications, design, effects for reactivity and partial oxidation

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High Redox Capacity of Al‐Doped La_1−xSr_xMnO_3−δ Perovskites for Splitting CO₂ and H₂O at Mn‐Enriched Surfaces