Electrochemical Reconstruction of NiFe/NiFeOOH Superparamagnetic Core/Catalytic Shell Heterostructure for Magnetic Heating Enhancement of Oxygen Evolution Reaction (Small 3/2023)

Peng, Dongquan; Hu, Ce; Luo, Xingfang; Huang, Jinli; Ding, Yan; Zhou, Wenda; Zhou, Hang; Yang, Yong; Yu, Ting; Wen, Lei; Yuan, Cailei

doi:10.1002/smll.202370014

Cited by 2 publications

(4 citation statements)

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“…Subsequently, the Gibbs free energies (ΔG) of the reactions according to the presence of NiSO 4 •6H 2 O in the OER mechanism were calculated and are presented below. [29] Reaction 1 : * + OH − = HO * + e − (7)…”

Section: Supporting Informationmentioning

confidence: 99%

Effect of Ni Sulfate Residue on Oxygen Evolution Reaction (OER) in Porous NiFe@NiFe Layered Double Hydroxide

Park,

Kwon,

Lee

et al. 2024

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The development of cost‐effective and high‐performance oxygen evolution reaction (OER) catalysts is a significant challenge. This study presents the synthesis of binder‐free NiFe@NiFe layered double hydroxide (NNF) via one‐pot electrodeposition on carbon paper and Ni foam at high current densities. The presence of Ni sulfate residues on the prepared NNF is also investigated. The findings indicate that Ni sulfate significantly improves OER performance and durability. The sulfate content can be controlled by varying the method and duration of washing. NNF prepared through dipping (NNF‐D) exhibits outstanding OER activity with a low overpotential of 241 mV, which is 25 mV lower than that of NNF washed for 60 s (NNF‐W‐60 s) at 10 mA cm−2 in 1 m KOH. Furthermore, density functional theory analyses indicate that the Ni sulfate residue helps modify the electronic structure, thereby optimizing the binding strength of *OOH. This synthetic strategy is expected to inspire the development of next‐generation catalysts utilizing various adsorbates.

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Section: Supporting Informationmentioning

confidence: 99%

Effect of Ni Sulfate Residue on Oxygen Evolution Reaction (OER) in Porous NiFe@NiFe Layered Double Hydroxide

Park,

Kwon,

Lee

et al. 2024

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“…Ferromagnetic nanoparticles can stably improve their catalytic performance by using a magnetic heating effect related to Neel relaxation. Based on NiFe nanoparticles prepared by pulsed laser deposition, Dongquan Pen [24] successfully prepared ECreconstructed NiFe/NiFeOOH core/shell nanoparticles in the highly conductive carbon matrix. The overpotential at 10 mA cm À 2 of the EC-reconstructed NiFe/NiFeOOH core/shell nanoparticles is 342.2 mv, and it is reduced to 209.2 mv when an AC magnetic field is applied.…”

Section: Magnetic Heating Effect Induced By the Magnetic Fieldmentioning

confidence: 99%

“…The efficiency of electrocatalysts is closely related to the electronic configuration, and the spin state is a profound problem that must be faced squarely. Although the spin state of reaction intermediates has been proven to be the key element to define a series of electrochemical reactions, it has [24] Copyright(2022), with permission from Wiley, ref. [21] Copyright(2022), with permission from American Chemical Society received little attention in water electrolysis.…”

Section: Ordering Of Spin States Induced By the Magnetic Fieldmentioning

confidence: 99%

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Recent Development of External Magnetic Field Assisted Oxygen Evolution Reaction‐A Mini Review

et al. 2023

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The environmental pollution caused by the extensive use of fossil fuels has seriously affected the living environment of human beings, and it is extremely urgent to find alternative new energy sources. Hydrogen energy is an ideal new energy, but the by‐products of traditional industrial hydrogen production will still cause pollution. Hydrogen energy prepared by electrolysis of water is green and environmentally friendly. Hydrogen production by electrolysis of water consists of two half‐reactions. Oxygen Evolution Reaction (OER) on the anode is hindered by thermodynamics and kinetics and the required applied voltage is far greater than the theoretical value. The voltage required for the reaction can be reduced by using catalysts, and different catalysts behave differently. At present, many strategies such as element doping, heterojunction construction, and substrate loading has been used to optimize catalysts, and excellent results have been achieved. However, with a large number of explorations, the optimization of traditional modification strategies has fallen into a bottleneck. It is a new idea to use an external field to assist OER. It has been reported that electric field, magnetic field, gravitational field, strain, and other auxiliary OER have achieved good results. The external magnetic field can accelerate the rate of electrochemical reaction, release the adhesion of bubbles on the electrode, promote mass transfer and change the reaction path. The combination of magnetic field and electrolytic water has the advantages of simplicity, continuity, dynamics, and reversibility. This paper summarizes the recent articles on magnetic field‐assisted water electrolysis, summarizes and classifies the effects of magnetic field‐assisted water electrolysis, and puts forward some conclusions and prospects, hoping to better understand and develop the application of magnetic field in OER.

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Electrochemical Reconstruction of NiFe/NiFeOOH Superparamagnetic Core/Catalytic Shell Heterostructure for Magnetic Heating Enhancement of Oxygen Evolution Reaction (Small 3/2023)

Cited by 2 publications

References 0 publications

Effect of Ni Sulfate Residue on Oxygen Evolution Reaction (OER) in Porous NiFe@NiFe Layered Double Hydroxide

Effect of Ni Sulfate Residue on Oxygen Evolution Reaction (OER) in Porous NiFe@NiFe Layered Double Hydroxide

Recent Development of External Magnetic Field Assisted Oxygen Evolution Reaction‐A Mini Review

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