Interface engineered NiFe2O4−x/NiMoO4 nanowire arrays for electrochemical oxygen evolution

Juhyung Choi; Daekyu Kim; Weiran Zheng; Bingyi Yan; Yong Li; Lawrence Yoon Suk Lee; Yuanzhe Piao

doi:10.1016/j.apcatb.2020.119857

Interface engineered NiFe₂O_4−x/NiMoO₄ nanowire arrays for electrochemical oxygen evolution

Juhyung Choi, Daekyu Kim, Weiran Zheng, Bingyi Yan, Yong Li, Lawrence Yoon Suk Lee^*, Yuanzhe Piao^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

141 Scopus citations

Abstract

Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe₂O_4−x nanoparticles were integrated to NiMoO₄ nanowires (NiFe₂O_4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe₂O_4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm⁻² and good long-term stability. The intimate interface between NiFe₂O_4−x and NiMoO₄ is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.

Original language	English
Article number	119857
Journal	Applied Catalysis B: Environmental
Volume	286
DOIs	https://doi.org/10.1016/j.apcatb.2020.119857
State	Published - 5 Jun 2021
Externally published	Yes

Keywords

Active surface phase
Electrocatalysis
Interface engineering
Oxygen evolution reaction
Prussian blue analog

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apcatb.2020.119857

Cite this

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title = "Interface engineered NiFe2O4−x/NiMoO4 nanowire arrays for electrochemical oxygen evolution",

abstract = "Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe2O4−x nanoparticles were integrated to NiMoO4 nanowires (NiFe2O4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe2O4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm−2 and good long-term stability. The intimate interface between NiFe2O4−x and NiMoO4 is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.",

keywords = "Active surface phase, Electrocatalysis, Interface engineering, Oxygen evolution reaction, Prussian blue analog",

author = "Juhyung Choi and Daekyu Kim and Weiran Zheng and Bingyi Yan and Yong Li and Lee, {Lawrence Yoon Suk} and Yuanzhe Piao",

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year = "2021",

month = jun,

day = "5",

doi = "10.1016/j.apcatb.2020.119857",

language = "英语",

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journal = "Applied Catalysis B: Environmental",

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AU - Choi, Juhyung

AU - Kim, Daekyu

AU - Zheng, Weiran

AU - Yan, Bingyi

AU - Li, Yong

AU - Lee, Lawrence Yoon Suk

AU - Piao, Yuanzhe

PY - 2021/6/5

Y1 - 2021/6/5

N2 - Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe2O4−x nanoparticles were integrated to NiMoO4 nanowires (NiFe2O4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe2O4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm−2 and good long-term stability. The intimate interface between NiFe2O4−x and NiMoO4 is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.

AB - Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe2O4−x nanoparticles were integrated to NiMoO4 nanowires (NiFe2O4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe2O4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm−2 and good long-term stability. The intimate interface between NiFe2O4−x and NiMoO4 is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.

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KW - Prussian blue analog

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