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Yu H, Liedienov N, Zatovsky I, Butenko D, Fesych I, Xu W, Song C, Li Q, Liu B, Pashchenko A, Levchenko G. The Multifunctionality of Lanthanum-Strontium Cobaltite Nanopowder: High-Pressure Magnetic Studies and Excellent Electrocatalytic Properties for OER. ACS Appl Mater Interfaces 2024; 16:3605-3620. [PMID: 38207161 PMCID: PMC10811629 DOI: 10.1021/acsami.3c06413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 12/12/2023] [Accepted: 12/19/2023] [Indexed: 01/13/2024]
Abstract
Simultaneous study of magnetic and electrocatalytic properties of cobaltites under extreme conditions expands the understanding of physical and chemical processes proceeding in them with the possibility of their further practical application. Therefore, La0.6Sr0.4CoO3 (LSCO) nanopowders were synthesized at different annealing temperatures tann = 850-900 °C, and their multifunctional properties were studied comprehensively. As tann increases, the rhombohedral perovskite structure of the LSCO becomes more single-phase, whereas the average particle size and dispersion grow. Co3+ and Co4+ are the major components. It has been found that LSCO-900 shows two main Curie temperatures, TC1 and TC2, associated with a particle size distribution. As pressure P increases, average ⟨TC1⟩ and ⟨TC2⟩ increase from 253 and 175 K under ambient pressure to 268 and 180 K under P = 0.8 GPa, respectively. The increment of ⟨dTC/dP⟩ for the smaller and bigger particles is sufficiently high and equals 10 and 13 K/GPa, respectively. The magnetocaloric effect in the LSCO-900 nanopowder demonstrates an extremely wide peak δTfwhm > 50 K that can be used as one of the composite components, expanding its working temperature window. Moreover, all LSCO samples showed excellent electrocatalytic performance for the oxygen evolution reaction (OER) process (overpotentials of only 265-285 mV at a current density of 10 mA cm-2) with minimal η10 for LSCO-900. Based on the experimental data, it was concluded that the formation of a dense amorphous layer on the surface of the particles ensures high stability as a catalyst (at least 24 h) during electrolysis in 1 M KOH electrolyte.
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Affiliation(s)
- Hanlin Yu
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
| | - Nikita Liedienov
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
- Donetsk
Institute for Physics and Engineering named after O.O. Galkin, NASU, Kyiv 03028, Ukraine
| | - Igor Zatovsky
- F.D.
Ovcharenko Institute of Biocolloidal Chemistry, NASU, Kyiv 03142, Ukraine
| | - Denys Butenko
- Department
of Physics, Southern University of Science
and Technology, Shenzhen 518055, P.R. China
| | - Igor Fesych
- Taras
Shevchenko National University of Kyiv, Kyiv 01030 , Ukraine
- Institute
of Magnetism NASU and MESU, Kyiv 03142, Ukraine
| | - Wei Xu
- State
Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College
of Chemistry, Jilin University, Changchun 130012, P.R. China
| | - Chunrui Song
- Baicheng
Normal University, Baicheng 137099, China
| | - Quanjun Li
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
| | - Bingbing Liu
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
| | - Aleksey Pashchenko
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
- Donetsk
Institute for Physics and Engineering named after O.O. Galkin, NASU, Kyiv 03028, Ukraine
- Institute
of Magnetism NASU and MESU, Kyiv 03142, Ukraine
| | - Georgiy Levchenko
- State
Key Laboratory of Superhard Materials, International Center of Future
Science, Jilin University, Changchun 130012, P.R. China
- Donetsk
Institute for Physics and Engineering named after O.O. Galkin, NASU, Kyiv 03028, Ukraine
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Gong Z, Xu W, Liedienov N, Butenko DS, Zatovsky I, Gural'skiy IA, Wei Z, Li Q, Liu B, Батман, Batman, ЮYЮ, Pashchenko A, Levchenko G. Expansion of multifunctionality in off-stoichiometric manganite using post-annealing and high pressure: physical and electrochemical studies. Phys Chem Chem Phys 2022; 24:21872-21885. [DOI: 10.1039/d2cp01959k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Prospects for the use of manganites in various areas of modern technologies require comprehensive studies of their physical and chemical properties. La0.9Mn1.1O3 (LMO) ceramics have been synthesized at annealing temperature...
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