Electrocatalytic Properties of Oxygen-Deficient Perovskites Ca3Fe3–xMnxO8 (x = 1–2) for the Hydrogen Evolution Reaction

Wickramaratne, Kinithi M. K.; Karki, Surendra B.; Ramezanipour, Farshid

doi:10.1021/acs.inorgchem.3c02243

Cited by 5 publications

(3 citation statements)

References 75 publications

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“…These properties make these materials promising for use in magnetic sensors [23], supercapacitors [24], and infrared bolometers [25,26]. They can also be utilized to create efficient electron correlation devices and catalysts [27][28][29][30]. Recently, the potential anticancer effects of lanthanum manganite nanoparticles have been studied [31].…”

Section: Introductionmentioning

confidence: 99%

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics

Googlev,

Kozakov,

Kochur

et al. 2024

Phys. Scr.

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Complex manganites A1-xCdxMnO3 (A=Pr, La) are synthesized by solid state reaction method. Xray diffraction, scanning electron microscopy, and energy-dispersive analysis are applied to study their crystal structure, surface morphology, elemental and phase composition. X-ray photoelectron spectroscopy (XPS) methods are used to study the charge states of Pr and La cations, as well as to quantify the fractions of coexisting Mn3+ and Mn4+ ions. La3d-, La4d-, Pr4d- и Mn2p-spectra of ions La3+, Pr3+, Mn3+ and Mn4+ are calculated in the isolated–ion approximation with accounting for multiplet splitting and charge transfer effect. Good agreement with the experiment is obtained. The relative fractions of trivalent and tetravalent manganese ions in La0.45Cd0.78Mn0,9O2.86 and Pr0.49Cd0.74Mn0.85O2.91 are determined by fitting the Mn2p spectra by the superpositions of experimental spectra containing only Mn3+ and only Mn4+ ions; they were found to be 0.71Mn3+/0.29Mn4+ and 0.54Mn3+/0.46Mn4+, respectively.

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Section: Introductionmentioning

confidence: 99%

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics

Googlev,

Kozakov,

Kochur

et al. 2024

Phys. Scr.

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show abstract

“…13 Very recently, the electrocatalytic properties of a range of oxygen-deficient Ca 3 Fe 3-x Mn x O 8 (x = 1-2) alloys were described in this journal. 14 These perovskites do not appear to be semiconductors, however; their electronic band structures were not explored in Ref. 14 unlike in the families of oxides identified above.…”

mentioning

confidence: 99%

“…14 These perovskites do not appear to be semiconductors, however; their electronic band structures were not explored in Ref. 14 unlike in the families of oxides identified above.…”

mentioning

confidence: 99%

Synthesis and Tuning of Electronic, Optical, and Photoelectrochemical Properties of Copper Metavanadate Alloys via Alkaline Earth Metal Substitution

Danladi,

Rawat,

Adak

et al. 2024

ECS J. Solid State Sci. Technol.

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Unlike the well-studied and technologically advanced Group III-V and Group II-VI compound semiconductor alloys, alloys of ternary metal oxide semiconductors have only recently begun to receive widespread attention. Here, we describe the effect of alkaline earth metal substitution on the optical, electronic, and photoelectrochemical (PEC) properties of copper metavanadate (CuV2O6). As a host, the Cu-V-O compound family presents a versatile framework to develop such composition-property correlations. Alloy compositions of A0.1Cu0.9V2O6 (A = Mg, Ca) photoanodes were synthesized via a time and energy-efficient solution combustion synthesis (SCS) method. The effect of introducing alkaline earth metals (Mg, Ca) on the crystal structure, microstructure, electronic, and optical properties of copper metavanadates was investigated by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), and Raman spectroscopy. The PXRD, TEM, and Raman spectroscopy data demonstrated the polycrystalline powder samples to be mutually soluble, solid solutions of copper and alkaline earth metal metavanadates and not simple mixtures of these compounds. The DRS data showed a systematic decrease in the optical bandgap with Cu incorporation. These trends were corroborated by electronic band structure calculations. Finally, the PEC properties exhibited a strong dependence on the alloy composition, pointing to possible applicability in solar water splitting, heterogeneous photocatalysis, phosphor lighting/displays, or photovoltaic devices

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Perovskite/cobalt-based metal-organic framework hybrid promotes hydrogen production from oilfield wastewater electrolysis

Li,

Cao,

et al. 2024

Electrochimica Acta

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Electrocatalytic Properties of Oxygen-Deficient Perovskites Ca₃Fe_3–xMn_xO₈ (x = 1–2) for the Hydrogen Evolution Reaction

Cited by 5 publications

References 75 publications

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics

Synthesis and Tuning of Electronic, Optical, and Photoelectrochemical Properties of Copper Metavanadate Alloys via Alkaline Earth Metal Substitution

Perovskite/cobalt-based metal-organic framework hybrid promotes hydrogen production from oilfield wastewater electrolysis

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Electrocatalytic Properties of Oxygen-Deficient Perovskites Ca3Fe3–xMnxO8 (x = 1–2) for the Hydrogen Evolution Reaction

Cited by 5 publications

References 75 publications

Crystal structure, composition and valence state of cations in mixed-valence A1−xCdxMnO3 (A=Pr, La) ceramics

Crystal structure, composition and valence state of cations in mixed-valence A1−xCdxMnO3 (A=Pr, La) ceramics

Synthesis and Tuning of Electronic, Optical, and Photoelectrochemical Properties of Copper Metavanadate Alloys via Alkaline Earth Metal Substitution

Perovskite/cobalt-based metal-organic framework hybrid promotes hydrogen production from oilfield wastewater electrolysis

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About

Electrocatalytic Properties of Oxygen-Deficient Perovskites Ca₃Fe_3–xMn_xO₈ (x = 1–2) for the Hydrogen Evolution Reaction

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics

Crystal structure, composition and valence state of cations in mixed-valence A_1−xCd_xMnO₃ (A=Pr, La) ceramics