The Multifunctionality of Lanthanum-Strontium Cobaltite Nanopowder: High-Pressure Magnetic Studies and Excellent Electrocatalytic Properties for OER

Yu，Hanlin1; Liedienov，Nikita1,2; Zatovsky，Igor3; Butenko，Denys4; Fesych，Igor5,6; Xu，Wei7; Song，Chunrui8; Li，Quanjun1; Liu，Bingbing1; Pashchenko，Aleksey1,2,6; Levchenko，Georgiy1,2

2024-01-24

10.1021/acsami.3c06413

ACS Applied Materials and Interfaces   影响因子和分区

1944-8244

1944-8252

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, LaSrCoO (LSCO) nanopowders were synthesized at different annealing temperatures t = 850-900 °C, and their multifunctional properties were studied comprehensively. As t increases, the rhombohedral perovskite structure of the LSCO becomes more single-phase, whereas the average particle size and dispersion grow. Co and Co are the major components. It has been found that LSCO-900 shows two main Curie temperatures, T and T, associated with a particle size distribution. As pressure P increases, average ⟨T⟩ and ⟨T⟩ increase from 253 and 175 K under ambient pressure to 268 and 180 K under P = 0.8 GPa, respectively. The increment of ⟨dT/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 δT > 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) with minimal η 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.

cobaltites electrochemistry high pressure magnetic studies nanopowder OER

SCI ; EI

英语

其他

2-s2.0-85182564466

Scopus

1.State Key Laboratory of Superhard Materials,International Center of Future Science,Jilin University,Changchun,130012,China
2.Donetsk Institute for Physics and Engineering named after O.O. Galkin,NASU,Kyiv,03028,Ukraine
3.F.D. Ovcharenko Institute of Biocolloidal Chemistry,NASU,Kyiv,03142,Ukraine
4.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China
5.Taras Shevchenko National University of Kyiv,Kyiv,01030,Ukraine
6.Institute of Magnetism NASU and MESU,Kyiv,03142,Ukraine
7.State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun,130012,China
8.Baicheng Normal University,Baicheng,137099,China

Yu，Hanlin,Liedienov，Nikita,Zatovsky，Igor,et al. The Multifunctionality of Lanthanum-Strontium Cobaltite Nanopowder: High-Pressure Magnetic Studies and Excellent Electrocatalytic Properties for OER[J]. ACS Applied Materials and Interfaces,2024,16(3):3605-3620.

Yu，Hanlin.,Liedienov，Nikita.,Zatovsky，Igor.,Butenko，Denys.,Fesych，Igor.,...&Levchenko，Georgiy.(2024).The Multifunctionality of Lanthanum-Strontium Cobaltite Nanopowder: High-Pressure Magnetic Studies and Excellent Electrocatalytic Properties for OER.ACS Applied Materials and Interfaces,16(3),3605-3620.

Yu，Hanlin,et al."The Multifunctionality of Lanthanum-Strontium Cobaltite Nanopowder: High-Pressure Magnetic Studies and Excellent Electrocatalytic Properties for OER".ACS Applied Materials and Interfaces 16.3(2024):3605-3620.