Nanostructured iron oxides for heterogeneous catalysis

Zhou, Di; Zhou, Yan; Li, Yong; Shen, Wenjie

doi:10.1016/j.enchem.2024.100124

EnergyChem

2024

DOI: 10.1016/j.enchem.2024.100124

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Nanostructured iron oxides for heterogeneous catalysis

Di Zhou,

Yan Zhou,

Yong Li

et al.

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Cited by 5 publications

References 214 publications

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Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Qiu,

Wu,

Liu

et al. 2024

Angewandte Chemie

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γ‐Fe2O3 with the intrinsic cation vacancies is an ideal substrate for heteroatom doping into the highly active octahedral sites in spinel oxide catalysts. However, it is still a challenge to confirm the vacancy location of γ‐Fe2O3 through experiments and obtain enhanced catalytic performance by preferential occupation of octahedral sites for heteroatom doping. Here, a Mn‐doped γ‐Fe2O3 incorporated with carbon nanotubes catalyst was developed to successfully achieve preferential doping into highly active octahedral sites by employing γ‐Fe2O3 as the precursor. Further, the vacancy in γ‐Fe2O3 was only located on octahedral sites rather than tetrahedral ones, which was first proved by direct experimental evidence through the clarification doping sites of Mn. Notably, the catalyst shows outstanding activity towards oxygen reduction reaction with the half‐wave potential of 0.82 V and 0.64 V vs. reversible hydrogen electrode in alkaline and neutral electrolytes, respectively, as well as the maximum power density of 179 mWcm−2 and 403 mWcm−2 for Mg‐air batteries and Al‐air batteries, respectively. It could be attributed to the synergistic effect of the doping Mn on octahedral sites and the substrate γ‐Fe2O3 along with the modification of the adsorption/desorption properties for ORR oxygen‐containing intermediates as well as the optimization of the reaction energy barriers.

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Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Qiu,

Wu,

Liu

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

show abstract

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Qiu,

Wu,

Liu

et al. 2024

Angew Chem Int Ed

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In-situ hydrothermal upgrading and mechanism of heavy oil with nano-Fe2O3 in the porous media

Li,

Yang,

Deng

et al. 2024

Journal of Analytical and Applied Pyrolysis

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Nanostructured iron oxides for heterogeneous catalysis

Cited by 5 publications

References 214 publications

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

In-situ hydrothermal upgrading and mechanism of heavy oil with nano-Fe2O3 in the porous media

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Nanostructured iron oxides for heterogeneous catalysis

Cited by 5 publications

References 214 publications

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe2O3 for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe2O3 for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe2O3 for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

In-situ hydrothermal upgrading and mechanism of heavy oil with nano-Fe2O3 in the porous media

Contact Info

Product

Resources

About

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries

Mn Doping at High‐Activity Octahedral Vacancies of γ‐Fe₂O₃ for Oxygen Reduction Reaction Electrocatalysis in Metal‐Air Batteries