Electronic and Magnetic Properties of SnFe2O4 Spinel Ferrites

Mounkachi, O.; Hamedoun, M.; Benyoussef, A.

doi:10.1007/s10948-017-4138-x

Cited by 13 publications

(2 citation statements)

References 15 publications

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“…This conclusion can be rationalized by the expected changes in electronic structure during the normal-inverse spinel transition. Computational studies and conductivity measurements on other spinel oxides including SnFe 2 O 4 , ZnCo 2 O 4 , and NiCo 2 O 4 have also recently indicated a more metallic conductivity with increasing δ [41,42] consistent with our experimental results ( Figure S9, Supporting Information). [28,36] Besides, cation disorder induces magnetic changes such as introducing an Fe T -O-Fe O superexchange interaction.…”

Section: Water Splittingsupporting

confidence: 89%

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes

et al. 2018

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Zinc spinel ferrite, ZnFe O (ZFO), is an emerging photoanode material for photoelectrochemical (PEC) solar fuel production. However, a lack of fundamental insight into the factors limiting the photocurrent has prevented substantial advance in its performance. Herein, it is found that ZFO nanorod array photoelectrodes with varying crystallinity exhibit vastly different PEC properties. Using a sacrificial hole scavenger (H O ), spatially defined carrier generation, and electrochemical impedance spectroscopy, it is shown that ZFO with a relatively poor crystallinity but a higher spinel inversion degree (due to cation disorder) exhibits superior photogenerated charge separation efficiency and improved majority charge carrier transport compared to ZFO with higher crystallinity and a lower inversion degree. Conversely, the latter condition leads to better charge injection efficiency. Optimization of these factors, and the addition of a nickel-iron oxide cocatalyst overlayer, leads to a new benchmark solar photocurrent for ZFO of 1.0 mA cm at 1.23 V versus reversible hydrogen electrode (RHE) and 1.7 mA cm at 1.6 V versus RHE. Importantly, the observed correlation between the cation disorder and the PEC performance represents a new insight into the factors important to the PEC performance of the spinel ferrites and suggests a path to further improvement.

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Section: Water Splittingsupporting

confidence: 89%

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes

et al. 2018

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“…This occurs when the distribution of Sn distribution changes from octahedral to tetrahedral. 126 The increase in resistivity at low temperatures, which commonly occurs, is considered a sign of resistance, such as tunneling insulation, within the system. The increase in resistivity with decreasing temperature may occur because of the weakening of double exchange (DE) interactions at irregular interfaces, resulting from damage to the Fe–O–Fe bonds on the nanoparticle surface and the breaking of lattice translational symmetry on the surface.…”

Section: Classification Of Magnetoresistance Materials Groupsmentioning

confidence: 99%

Magnetoresistance (MR) properties of magnetic materials

Vitayaya,

Zul Nehan,

Munazat

et al. 2024

RSC Adv.

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Shape-dependent photocatalytic performance of SnFe2O4 nanocrystals synthesized by hydrothermal method

Zhang

Wang

Zhang

et al. 2018

J Sol-Gel Sci Technol

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Electronic and Magnetic Properties of SnFe2O4 Spinel Ferrites

Cited by 13 publications

References 15 publications

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes

Magnetoresistance (MR) properties of magnetic materials

Shape-dependent photocatalytic performance of SnFe2O4 nanocrystals synthesized by hydrothermal method

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Electronic and Magnetic Properties of SnFe2O4 Spinel Ferrites

Cited by 13 publications

References 15 publications

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe2O4 Nanorod Photoanodes

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe2O4 Nanorod Photoanodes

Magnetoresistance (MR) properties of magnetic materials

Shape-dependent photocatalytic performance of SnFe2O4 nanocrystals synthesized by hydrothermal method

Contact Info

Product

Resources

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Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes

Spinel Structural Disorder Influences Solar‐Water‐Splitting Performance of ZnFe₂O₄ Nanorod Photoanodes