Electrocatalytic activity of various hexagonal ferrites in OER process

Винник, Д.А.; Коковкин, В. В.; Volchek, Victoria V.; Живулин, В.Е.; Abramov, Pavel A.; Cherkasova, N.A.; Sun, Zhipeng; Sayyed, M.I.; Тишкевич, Д.И.; Труханов, А.В.

doi:10.1016/j.matchemphys.2021.124818

Cited by 65 publications

(12 citation statements)

References 34 publications

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“…The CV measurements were carried out in a three-electrode cell with a paste electrode, an auxiliary electrode, and a reference electrode using a potentiostat-galvanostat P-45X (Elins, Chernogolovka, Russia) at 25 °C. The description of the cell and the measurement procedure have been previously reported [ 96 , 97 , 98 ]. The composition of the paste included carbon powder:EAS:Nafion = 100:10:4 mg (Nafion, 10% aqueous dispersion calculated on dry matter) for the complex 1 and the precursor.…”

Section: Methodsmentioning

confidence: 99%

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

et al. 2022

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Self-assembly of (Bu4N)4[β-Mo8O26], AgNO3, and 2-bis[(2,6-diisopropylphenyl)-imino]acenaphthene (dpp-bian) in DMF solution resulted in the (Bu4N)2[β-{Ag(dpp-bian)}2Mo8O26] (1) complex. The complex was characterized by single crystal X-ray diffraction (SCXRD), X-ray powder diffraction (XRPD), diffuse reflectance (DR), infrared spectroscopy (IR), and elemental analysis. Comprehensive SCXRD studies of the crystal structure show the presence of Ag+ in an uncommon coordination environment without a clear preference for Ag-N over Ag-O bonding. Quantum chemical calculations were performed to qualify the nature of the Ag-N/Ag-O interactions and to assign the electronic transitions observed in the UV–Vis absorption spectra. The electrochemical behavior of the complex combines POM and redox ligand signatures. Complex 1 demonstrates catalytic activity in the electrochemical reduction of CO2.

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Section: Methodsmentioning

confidence: 99%

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

et al. 2022

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“…Precious metals have excellent OER activity, but high price and scarce reserve limit their widespread application. − Inexpensive and abundant transition metals, such as Fe-, Co-, and Ni-based compounds, exhibit good OER activity. ,,, Among them, spinel ferrites are of interest for good OER stability and elemental tunability. , Metal sulfurs/phosphides are more electrochemically active than oxides. , In addition, lattice distortion and charge redistribution may occur after sulfide/phosphorus treatment of the oxide, which facilitate the adjustment of the electronic structure of the electrocatalyst to improve the electrocatalytic properties. ,, Several studies have shown that external fields can facilitate electrocatalytic reactions, like light, thermal, and magnetic fields. ,− In particular, the magnetic field was most effective on the promotion of OER performance, as the magnetic field could generate multiple effects during the electrocatalytic process, such as spin selectivity, magnetohydrodynamic, magnetothermal, and Faraday electromagnetic induction effects. − …”

Section: Introductionmentioning

confidence: 99%

Effects of Alternating Magnetic Fields on the OER of Heterogeneous Core–Shell Structured NiFe₂O₄@(Ni, Fe)S/P

Wang

Yang

Yue

et al. 2023

ACS Appl. Mater. Interfaces

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Composition optimization, structural design, and introduction of external magnetic fields into the catalytic process can remarkably improve the oxygen evolution reaction (OER) performance of a catalyst. NiFe2O4@(Ni, Fe)S/P materials with a heterogeneous core–shell structure were prepared by the sulfide/phosphorus method based on spinel-structured NiFe2O4 nanomicrospheres. After the sulfide/phosphorus treatment, not only the intrinsic activity of the material and the active surface area were increased but also the charge transfer resistance was reduced due to the internal electric field. The overpotential of NiFe2O4@(Ni, Fe)P at 10 mA cm–2 (iR correction), Tafel slope, and charge transfer resistance were 261 mV, 42 mV dec–1, and 3.163 Ω, respectively. With an alternating magnetic field, the overpotential of NiFe2O4@(Ni, Fe)P at 10 mA cm–2 (without iR correction) declined by 45.5% from 323 mV (0 mT) to 176 mV (4.320 mT). Such enhancement of performance is primarily accounted for the enrichment of the reactive ion OH– on the electrode surface induced by the inductive electric potential derived from the Faraday induction effect of the AMF. This condition increased the electrode potential and thus the charge transfer rate on the one hand and weakened the diffusion of the active substance from the electrolyte to the electrode surface on the other hand. The OER process was dominantly controlled by the charge transfer process under low current conditions. A fast charge transfer rate boosted the OER performance of the catalyst. At high currents, diffusion exerted a significant effect on the OER process and low OH– diffusion rates would lead to a decrease in the OER performance of the catalyst.

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“…Functional materials for distinctly efficient hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) attract considerable attention. [1][2][3][4][5][6] A highly active electrode material for the OER is urgently required because the OER has a sluggish kinetics as compared to the HER. Due to excellent oxygen evolution electrocatalytic performance, contemporary IrO 2 and RuO 2 , etc.…”

Section: Introductionmentioning

confidence: 99%

Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process

et al. 2023

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Electrocatalytic activity of various hexagonal ferrites in OER process

Cited by 65 publications

References 34 publications

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

Effects of Alternating Magnetic Fields on the OER of Heterogeneous Core–Shell Structured NiFe₂O₄@(Ni, Fe)S/P

Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process

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Electrocatalytic activity of various hexagonal ferrites in OER process

Cited by 65 publications

References 34 publications

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

Trapping of Ag+ into a Perfect Six-Coordinated Environment: Structural Analysis, Quantum Chemical Calculations and Electrochemistry

Effects of Alternating Magnetic Fields on the OER of Heterogeneous Core–Shell Structured NiFe2O4@(Ni, Fe)S/P

Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process

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Effects of Alternating Magnetic Fields on the OER of Heterogeneous Core–Shell Structured NiFe₂O₄@(Ni, Fe)S/P