Monodispersed hierarchical γ-ALOOH/Fe(OH)3 micro/nanoflowers for efficient oxygen evolution reaction

Wang Huo; Li Li; Yongxing Zhang; Jia Li; Qianqian Xu; Baojie Zhang; Lei Zhang; Xuanhua Li

doi:10.3389/fmats.2019.00154

Monodispersed hierarchical γ-ALOOH/Fe(OH)₃ micro/nanoflowers for efficient oxygen evolution reaction

Wang Huo, Li Li, Yongxing Zhang, Jia Li, Qianqian Xu, Baojie Zhang, Lei Zhang, Xuanhua Li

School of Materials Sience and Engineering

Huaibei Normal University

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

10 Scopus citations

Abstract

Exploring efficient and inexpensive nanostructured catalysts for the oxygen evolution reaction (OER) is critical for economical electrochemical water splitting. Here, monodispersed γ-AlOOH/Fe(OH)₃ with hierarchical structures have been synthesized by a facile hydrothermal method and an electrostatic attraction treatment. The low overpotential of only 289 mV at a current density of 10 mA cm⁻² for γ-AlOOH/Fe(OH)₃ with a low Tafel slope of 80.2 mV dec⁻¹, which is greatly decreased than that of γ-AlOOH (347 mV and 88.4 mV dec⁻¹). The monodispersed γ-AlOOH/Fe(OH)₃ with hierarchical structures and abundance of surface hydroxyls have high specific surface areas and large pore volumes, which can provide more active sites to help the transfer of the electrons to improve the electrocatalytic performance for OER.

Original language	English
Article number	154
Journal	Frontiers in Materials
Volume	6
DOIs	https://doi.org/10.3389/fmats.2019.00154
State	Published - 9 Jul 2019

Keywords

Electrocatalyst
Hierarchical micro/nanostructures
Mesoporous/macroporous structures
Oxygen evolution reaction
Solvothermal method
γ-AlOOH/Fe(OH)

UN SDGs

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

Access to Document

10.3389/fmats.2019.00154

Cite this

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title = "Monodispersed hierarchical γ-ALOOH/Fe(OH)3 micro/nanoflowers for efficient oxygen evolution reaction",

abstract = "Exploring efficient and inexpensive nanostructured catalysts for the oxygen evolution reaction (OER) is critical for economical electrochemical water splitting. Here, monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures have been synthesized by a facile hydrothermal method and an electrostatic attraction treatment. The low overpotential of only 289 mV at a current density of 10 mA cm−2 for γ-AlOOH/Fe(OH)3 with a low Tafel slope of 80.2 mV dec−1, which is greatly decreased than that of γ-AlOOH (347 mV and 88.4 mV dec−1). The monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures and abundance of surface hydroxyls have high specific surface areas and large pore volumes, which can provide more active sites to help the transfer of the electrons to improve the electrocatalytic performance for OER.",

keywords = "Electrocatalyst, Hierarchical micro/nanostructures, Mesoporous/macroporous structures, Oxygen evolution reaction, Solvothermal method, γ-AlOOH/Fe(OH)",

author = "Wang Huo and Li Li and Yongxing Zhang and Jia Li and Qianqian Xu and Baojie Zhang and Lei Zhang and Xuanhua Li",

note = "Publisher Copyright: {\textcopyright} 2019 Huo, Li, Zhang, Li, Xu, Zhang, Zhang and Li.",

year = "2019",

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AU - Huo, Wang

AU - Li, Li

AU - Zhang, Yongxing

AU - Li, Jia

AU - Xu, Qianqian

AU - Zhang, Baojie

AU - Zhang, Lei

AU - Li, Xuanhua

PY - 2019/7/9

Y1 - 2019/7/9

N2 - Exploring efficient and inexpensive nanostructured catalysts for the oxygen evolution reaction (OER) is critical for economical electrochemical water splitting. Here, monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures have been synthesized by a facile hydrothermal method and an electrostatic attraction treatment. The low overpotential of only 289 mV at a current density of 10 mA cm−2 for γ-AlOOH/Fe(OH)3 with a low Tafel slope of 80.2 mV dec−1, which is greatly decreased than that of γ-AlOOH (347 mV and 88.4 mV dec−1). The monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures and abundance of surface hydroxyls have high specific surface areas and large pore volumes, which can provide more active sites to help the transfer of the electrons to improve the electrocatalytic performance for OER.

AB - Exploring efficient and inexpensive nanostructured catalysts for the oxygen evolution reaction (OER) is critical for economical electrochemical water splitting. Here, monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures have been synthesized by a facile hydrothermal method and an electrostatic attraction treatment. The low overpotential of only 289 mV at a current density of 10 mA cm−2 for γ-AlOOH/Fe(OH)3 with a low Tafel slope of 80.2 mV dec−1, which is greatly decreased than that of γ-AlOOH (347 mV and 88.4 mV dec−1). The monodispersed γ-AlOOH/Fe(OH)3 with hierarchical structures and abundance of surface hydroxyls have high specific surface areas and large pore volumes, which can provide more active sites to help the transfer of the electrons to improve the electrocatalytic performance for OER.

KW - Electrocatalyst

KW - Hierarchical micro/nanostructures

KW - Mesoporous/macroporous structures

KW - Oxygen evolution reaction

KW - Solvothermal method

KW - γ-AlOOH/Fe(OH)

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