Oxidation states of Co and Fe in Ba1−xSrxCo1−yFeyO3−δ (x, y = 0.2–0.8) and oxygen desorption in the temperature range 300–1273 K
Literature Information
Ashley S. Harvey, F. Jochen Litterst, Zhen Yang, Jennifer L. M. Rupp, Anna Infortuna, Ludwig J. Gauckler
Four compositions of Ba1−xSrxCo1−yFeyO3−δ were studied for phase, oxygen uptake–release, and transition metal (TM) oxidation states after solid state processing and with in situ heating from 300 to 1273 K in air. X-Ray diffraction showed that all compositions except one had the cubic perovskite structure at all temperatures; that with x, y = 0.2 was a mixture as prepared, becoming predominantly cubic at high temperature. Thermogravimetry showed a reversible oxygen absorption–desorption of approximately ±1% from 700 to 1273 K. X-Ray absorption and Mössbauer spectroscopy showed a majority TM3+ valence, with at most 40% TM4+. Up to a temperature of 1073 K, the TM4+ was reduced to TM3+. Further heating of the composition with x, y = 0.2 to 1233 K resulted in the reduction of Co3+ to Co2+. Results from room temperature measurements confirm the thermally activated carrier hopping mechanism with charge fluctuations, while the high temperature delocalized carrier conductivity occurs with a small amount of TM reduction and without phase change for the initially cubic samples.
Recommended Journals
Related Literature
Water-induced formation of a chiral phenylalanine derivative supramolecule
Weilin Chen, Zhiqiang Zhu, Chang Yin, Yibao Li, Yi Liu, Yuting Zhang, Yulan Fan, Xiaolin Fan
DOI: 10.1039/C7CP05845D
X3 synthon geometries in two-dimensional halogen-bonded 1,3,5-tris(3,5-dibromophenyl)benzene self-assembled nanoarchitectures on Au(111)-( )
David Peyrot, Mathieu G. Silly, Fabien Silly
DOI: 10.1039/C7CP06488H
Electrokinetic flow of an aqueous electrolyte in amorphous silica nanotubes
Christopher D. Daub, Natalie M. Cann, D. Bratko, Alenka Luzar
DOI: 10.1039/C8CP03791D
Correction: Necessary and sufficient conditions for the successful three-phase photocatalytic reduction of CO2 by H2O over heterogeneous photocatalysts
DOI: 10.1039/C8CP91824D
A hybrid hydrazine redox flow battery with a reversible electron acceptor
Swapnil Varhade, Zahid M. Bhat, Ravikumar Thimmappa, Mruthyunjayachari C. Devendrachari, Alagar R. Kottaichamy, Manu Gautam, Shahid P. Shafi, Musthafa Ottakam Thotiyl
DOI: 10.1039/C8CP03768J
Group-VIII transition metal boride as promising hydrogen evolution reaction catalysts
Guang-Feng Wei, Ling-Ran Zhang, Zhi-Pan Liu
DOI: 10.1039/C8CP05079A
Composition dependent transport diffusion in non-ideal mixtures from spatially resolved nuclear magnetic resonance spectroscopy
Christian F. Pantoja, Y. Mauricio Muñoz-Muñoz, Lorraine Guastar, Jadran Vrabec, Julien Wist
DOI: 10.1039/C8CP05539D
Effects of nanostructuring on the bond strength and disorder in V2O5 cathode material for rechargeable ion-batteries
Irene Isturiz, Carlo Marini, Marta Avila, Masashi Okubo, Huiqiao Li, Haoshen Zhou, Takashi Mizokawa, Naurang Lal Saini, Laura Simonelli
DOI: 10.1039/C8CP00716K
Electrochemical surface-enhanced Raman spectroscopy (EC-SERS) study of the interaction between protein aggregates and biomimetic membranes
Reem Ahmed Karaballi, Soraya Merchant, Sasha R. Power, Christa L. Brosseau
DOI: 10.1039/C7CP06838G
Remarkable hydrogen storage properties of MgH2 doped with VNbO5
Antonio Valentoni, Gabriele Mulas, Stefano Enzo
DOI: 10.1039/C7CP07157D
You might also like
Is 6-(3-Fluorophenyl)picolinic acid (CAS: 887982-40-3) safe?
6-(3-Fluorophenyl)picolinic acid is generally considered safe for laboratory use...
What industries use (3R)-3-Pyrrolidinol (CAS: 2799-21-5)?
(3R)-3-Pyrrolidinol is used in the pharmaceutical industry as a precursor for dr...
What precautions should be taken when handling (4R,5R)-4,5-Diethoxycarbonyl-2,2-dimethyldioxolane (CAS: 59779-75-8)?
When handling (4R,5R)-4,5-Diethoxycarbonyl-2,2-dimethyldioxolane (CAS: 59779-75-...
How is 1-(6-Chloroimidazo[1,2-b]pyridazin-3-yl)ethanone (CAS: 90734-71-7) typically synthesized?
1-(6-Chloroimidazo[1,2-b]pyridazin-3-yl)ethanone is often synthesized via a mult...
What is the market or research trend for N-Ethyl-3,4-dimethylbenzylamine (CAS: 39180-83-1)?
The market for N-Ethyl-3,4-dimethylbenzylamine (CAS: 39180-83-1) remains steady,...
What is Tert-butyl 3-(pyrrolidin-1-yl)azetidine-1-carboxylate (CAS: 1019008-21-9)?
Tert-butyl 3-(pyrrolidin-1-yl)azetidine-1-carboxylate is a chemical compound wit...
What regulatory guidelines apply to 1-Bromo-3-chloro-2,4-dimethoxybenzene (CAS: 1228956-93-1)?
1-Bromo-3-chloro-2,4-dimethoxybenzene (CAS: 1228956-93-1) falls under the classi...
Is 8-Bromo-2-methyl-3,4-dihydroisoquinolin-1(2H)-one (CAS: 1368622-07-4) safe?
The safety of 8-Bromo-2-methyl-3,4-dihydroisoquinolin-1(2H)-one (CAS: 1368622-07...
Is Benzyl [(3S)-2,6-dioxo-3-piperidinyl]carbamate (CAS: 22785-43-9) safe?
Benzyl [(3S)-2,6-dioxo-3-piperidinyl]carbamate is generally safe when handled wi...
How should 1-{[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]sulfonyl}pyrrolidine (CAS: 928657-21-0) be stored?
1-{[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]sulfonyl}pyrrolidine s...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










![4-[(2,4-Dihydroxyphenyl)diazenyl]-5-hydroxy-2,7-naphthalenedisulfonic acid structure 4-[(2,4-Dihydroxyphenyl)diazenyl]-5-hydroxy-2,7-naphthalenedisulfonic acid structure](https://static.chemtradehub.com/structs/362/3627-01-8-79ac.webp)



