Coupling ferromagnetic ordering electron transfer channels and surface reconstructed active species for spintronic electrocatalysis of water oxidation

He, Zexing; Liu, Xiaokang; Zhang, Minghui; Guo, Liu; Ajmal, Muhammad; Pan, Lun; Shi, Chengxiang; Zhang, Xiangwen; Huang, Zhen‐Feng; Zou, Ji‐Jun

doi:10.1016/j.jechem.2023.06.043

Cited by 7 publications

(4 citation statements)

References 65 publications

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“…In addition, the ex situ M-H of Ru–Ni 3 Se 4 /NiSe@NC were measured under a magnetic field from −3 to 3 kOe at 300 K during the initial charge/discharge process. The M-H loops (Figure c) show S-like curves, confirming the ferromagnetic properties of the electrode. − A comparison of the coercive force ( H C ), saturated magnetization ( M S ), and residual magnetization ( M R ) is presented (Table S3, Supporting Information). The H C increases significantly from 150.2 to 211.4 Oe from stage B (0.01 V) to stage C (3.0 V), which is ascribed to the rich Ni vacancies in the heterostructure .…”

Section: Resultsmentioning

confidence: 63%

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Sun,

Liu,

Liang

et al. 2024

ACS Appl. Nano Mater.

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Metal−organic frameworks are widely used as anode materials for lithium-ion batteries (LIBs) because of their high specific surface areas and rich surface-active sites. However, their poor electronic conductivity and weak structural durability lead to rapid capacity fading during cycling. To solve these problems, NiRu-MOF nanotubes were templated to synthesize Ru-doped biphasic selenide nanotubes wrapped with a nitrogen-doped carbon layer (Ru−Ni 3 Se 4 /NiSe@NC). X-ray photoelectron spectroscopy and EDS tests confirm that Ru element has been successfully introduced into nanotubes. Density functional theory calculations further discover the decreased band gap and increased conductivity of Ru−Ni 3 Se 4 /NiSe@NC owing to the Ru doping effect. As the anode material for LIBs, the Ru−Ni 3 Se 4 /NiSe@NC delivers a large specific capacity of 1138 mA h g −1 at 100 mA g −1 and an excellent reversible capability of 452 mA h g −1 at 10,000 mA g −1 after 3000 cycles. The Ru−Ni 3 Se 4 /NiSe@NC//LiCoO 2 full cell also presents a specific capacity of 434 mA h g −1 at 200 mA g −1 after 200 cycles. This work extends the NiRu-MOF family of materials to develop promising anode materials for high-performance LIBs.

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Section: Resultsmentioning

confidence: 63%

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Sun,

Liu,

Liang

et al. 2024

ACS Appl. Nano Mater.

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“…This channel enhances the ability to selectively remove spin-oriented electrons from the reactants during the OER process, which helps to accumulate appropriate magnetic moments for the evolution of triplet oxygen molecules, as schematically illustrated in Figure i. These ferromagnetic exchange-like effects avoid any spin-flipping step, which is favorable with the low kinetic barrier. , However, the above effect cannot be achieved within other magnetic electrocatalysts with weak exchange effects, such as α-Fe 2 O 3 . These DFT results support our experimental observations that catalysts with a greater content of γ-Fe 2 O 3 compared with that of α-Fe 2 O 3 have a greater enhancement of OER performance in the external magnetic field.…”

Section: Resultsmentioning

confidence: 99%

“…These ferromagnetic exchange-like effects avoid any spin-flipping step, which is favorable with the low kinetic barrier. 55,56 However, the above effect cannot be achieved within other magnetic electrocatalysts with weak exchange effects, such as α-Fe 2 O 3 . These DFT results support our experimental observations that catalysts with a greater content of γ-Fe 2 O 3 compared with that of α-Fe 2 O 3 have a greater enhancement of OER performance in the external magnetic field.…”

Section: Density Functional Theory Studiesmentioning

confidence: 99%

Modulation of the Phase Transformation of Fe₂O₃ for Enhanced Water Oxidation under a Magnetic Field

Song,

Wei,

Zhou

et al. 2024

ACS Catal.

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Ferromagnetic catalysts in the presence of an external magnetic field can promote the reaction kinetics of the oxygen evolution reaction (OER) by enhancing spin-selective electron transfer as intermediates and products confer spindependent behavior. It has been found that γ-Fe 2 O 3 with ferromagnetism exhibits an enhanced performance for the OER activity, but its preparation is limited. Herein, we report an adsorption-pyrolysis process in air in which the transformation of α-Fe 2 O 3 into γ-Fe 2 O 3 is precisely regulated by controlling the content of Co ions. Interestingly, a small, constant external magnetic field (∼200 mT) was applied at the anode, resulting in a significant impact on the OER performance of the obtained series of catalysts with different contents of γ-Fe 2 O 3 under alkaline conditions. Theoretical results reveal that the same spin configuration of Fe and O atoms in γ-Fe 2 O 3 provides a spin conduction channel, which enhances the ability to selectively remove spin-oriented electrons from the reactants and accelerates the accumulation of triplet oxygen molecules during the OER process, thereby promoting the OER. These findings provide a strategy toward the controllable phase transformation of Fe 2 O 3 and deep insights for understanding the OER behavior of Fe-based electrocatalysts under magnetic fields.

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“…On the other hand, smaller d - p gap means a reduced energy gap between the bonding and antibonding orbitals, thus facilitating the interfacial electron transfer and the conversion of LiPSs. However, the upward shift of d -band center does not mean that the d - p gap becomes larger, because the introduction of metal ions into TMCs also adjusts the p -band center [ 183 ]. Therefore, for TMCs containing anions, considering that the energy of the electrons in the p and d orbitals will directly affect bond formation and breaking, the p -band center of the nonmetallic site should be considered along with the d -band center.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

A Review on Engineering Transition Metal Compound Catalysts to Accelerate the Redox Kinetics of Sulfur Cathodes for Lithium–Sulfur Batteries

Chen,

Cao,

et al. 2024

Nano-Micro Lett.

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Engineering transition metal compounds (TMCs) catalysts with excellent adsorption-catalytic ability has been one of the most effective strategies to accelerate the redox kinetics of sulfur cathodes. Herein, this review focuses on engineering TMCs catalysts by cation doping/anion doping/dual doping, bimetallic/bi-anionic TMCs, and TMCs-based heterostructure composites. It is obvious that introducing cations/anions to TMCs or constructing heterostructure can boost adsorption-catalytic capacity by regulating the electronic structure including energy band, d/p-band center, electron filling, and valence state. Moreover, the electronic structure of doped/dual-ionic TMCs are adjusted by inducing ions with different electronegativity, electron filling, and ion radius, resulting in electron redistribution, bonds reconstruction, induced vacancies due to the electronic interaction and changed crystal structure such as lattice spacing and lattice distortion. Different from the aforementioned two strategies, heterostructures are constructed by two types of TMCs with different Fermi energy levels, which causes built-in electric field and electrons transfer through the interface, and induces electron redistribution and arranged local atoms to regulate the electronic structure. Additionally, the lacking studies of the three strategies to comprehensively regulate electronic structure for improving catalytic performance are pointed out. It is believed that this review can guide the design of advanced TMCs catalysts for boosting redox of lithium sulfur batteries.

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Coupling ferromagnetic ordering electron transfer channels and surface reconstructed active species for spintronic electrocatalysis of water oxidation

Cited by 7 publications

References 65 publications

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Modulation of the Phase Transformation of Fe₂O₃ for Enhanced Water Oxidation under a Magnetic Field

A Review on Engineering Transition Metal Compound Catalysts to Accelerate the Redox Kinetics of Sulfur Cathodes for Lithium–Sulfur Batteries

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Coupling ferromagnetic ordering electron transfer channels and surface reconstructed active species for spintronic electrocatalysis of water oxidation

Cited by 7 publications

References 65 publications

Ru-Doped Ni3Se4/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Ru-Doped Ni3Se4/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Modulation of the Phase Transformation of Fe2O3 for Enhanced Water Oxidation under a Magnetic Field

A Review on Engineering Transition Metal Compound Catalysts to Accelerate the Redox Kinetics of Sulfur Cathodes for Lithium–Sulfur Batteries

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Product

Resources

About

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Ru-Doped Ni₃Se₄/NiSe/Nitrogen-Doped Carbon Nanotube Heterostructure for Lithium Storage

Modulation of the Phase Transformation of Fe₂O₃ for Enhanced Water Oxidation under a Magnetic Field