Ni/Co-based nanosheet arrays for efficient oxygen evolution reaction

Yong Li; Liangsheng Hu; Weiran Zheng; Xiang Peng; Mengjie Liu; Paul K. Chu; Lawrence Yoon Suk Lee

doi:10.1016/j.nanoen.2018.08.010

Ni/Co-based nanosheet arrays for efficient oxygen evolution reaction

Yong Li, Liangsheng Hu, Weiran Zheng, Xiang Peng, Mengjie Liu, Paul K. Chu^*, Lawrence Yoon Suk Lee

^*Corresponding author for this work

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

130 Scopus citations

Abstract

Efficient oxygen evolution reaction (OER) catalysts composed of earth-abundant elements are crucial to the development of practical and environmentally friendly water splitting systems. Herein, NiCoO₂/CoO/Ni₃N nanosheet arrays (NiCoON NSAs/NF) are fabricated in situ on the 3D nickel foam. In the alkaline solution, the NiCoON nanocomposite has excellent catalytic OER properties such as a small overpotential of 247 mV (at 10 mA cm⁻²) and Tafel slope of 35 mV dec⁻¹, which are better than those of Ni_xCo_3-xO₄ and most Ni- and Co-based catalysts. There are more active sites with oxygen vacancies on NiCoON NSAs after the treatment with NH₃ and the face-centered cubic NiCoO₂ enhances the formation of active Ni-Co layered hydroxide/oxyhydroxide species (NiOOH) in comparison with spinal Ni_xCo_3-xO₄ during the electrochemical process. In addtion, the Ni³⁺-rich surface together with Co incorporation facilitates the formation of β-NiOOH. Our study reveals that control of active species on NiCoON NSAs/NF leads to high activity and stability in OER catalysis.

Original language	English
Pages (from-to)	360-368
Number of pages	9
Journal	Nano Energy
Volume	52
DOIs	https://doi.org/10.1016/j.nanoen.2018.08.010
State	Published - Oct 2018
Externally published	Yes

Keywords

Electrocatalysis
Nanosheet array
NiCo nanocomposite
Oxygen evolution reaction

UN SDGs

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

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10.1016/j.nanoen.2018.08.010

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@article{79cf413d327b4e71a242466b6ff10414,

title = "Ni/Co-based nanosheet arrays for efficient oxygen evolution reaction",

abstract = "Efficient oxygen evolution reaction (OER) catalysts composed of earth-abundant elements are crucial to the development of practical and environmentally friendly water splitting systems. Herein, NiCoO2/CoO/Ni3N nanosheet arrays (NiCoON NSAs/NF) are fabricated in situ on the 3D nickel foam. In the alkaline solution, the NiCoON nanocomposite has excellent catalytic OER properties such as a small overpotential of 247 mV (at 10 mA cm−2) and Tafel slope of 35 mV dec−1, which are better than those of NixCo3-xO4 and most Ni- and Co-based catalysts. There are more active sites with oxygen vacancies on NiCoON NSAs after the treatment with NH3 and the face-centered cubic NiCoO2 enhances the formation of active Ni-Co layered hydroxide/oxyhydroxide species (NiOOH) in comparison with spinal NixCo3-xO4 during the electrochemical process. In addtion, the Ni3+-rich surface together with Co incorporation facilitates the formation of β-NiOOH. Our study reveals that control of active species on NiCoON NSAs/NF leads to high activity and stability in OER catalysis.",

keywords = "Electrocatalysis, Nanosheet array, NiCo nanocomposite, Oxygen evolution reaction",

author = "Yong Li and Liangsheng Hu and Weiran Zheng and Xiang Peng and Mengjie Liu and Chu, {Paul K.} and Lee, {Lawrence Yoon Suk}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = oct,

doi = "10.1016/j.nanoen.2018.08.010",

language = "英语",

volume = "52",

pages = "360--368",

journal = "Nano Energy",

issn = "2211-2855",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Ni/Co-based nanosheet arrays for efficient oxygen evolution reaction

AU - Li, Yong

AU - Hu, Liangsheng

AU - Zheng, Weiran

AU - Peng, Xiang

AU - Liu, Mengjie

AU - Chu, Paul K.

AU - Lee, Lawrence Yoon Suk

PY - 2018/10

Y1 - 2018/10

N2 - Efficient oxygen evolution reaction (OER) catalysts composed of earth-abundant elements are crucial to the development of practical and environmentally friendly water splitting systems. Herein, NiCoO2/CoO/Ni3N nanosheet arrays (NiCoON NSAs/NF) are fabricated in situ on the 3D nickel foam. In the alkaline solution, the NiCoON nanocomposite has excellent catalytic OER properties such as a small overpotential of 247 mV (at 10 mA cm−2) and Tafel slope of 35 mV dec−1, which are better than those of NixCo3-xO4 and most Ni- and Co-based catalysts. There are more active sites with oxygen vacancies on NiCoON NSAs after the treatment with NH3 and the face-centered cubic NiCoO2 enhances the formation of active Ni-Co layered hydroxide/oxyhydroxide species (NiOOH) in comparison with spinal NixCo3-xO4 during the electrochemical process. In addtion, the Ni3+-rich surface together with Co incorporation facilitates the formation of β-NiOOH. Our study reveals that control of active species on NiCoON NSAs/NF leads to high activity and stability in OER catalysis.

AB - Efficient oxygen evolution reaction (OER) catalysts composed of earth-abundant elements are crucial to the development of practical and environmentally friendly water splitting systems. Herein, NiCoO2/CoO/Ni3N nanosheet arrays (NiCoON NSAs/NF) are fabricated in situ on the 3D nickel foam. In the alkaline solution, the NiCoON nanocomposite has excellent catalytic OER properties such as a small overpotential of 247 mV (at 10 mA cm−2) and Tafel slope of 35 mV dec−1, which are better than those of NixCo3-xO4 and most Ni- and Co-based catalysts. There are more active sites with oxygen vacancies on NiCoON NSAs after the treatment with NH3 and the face-centered cubic NiCoO2 enhances the formation of active Ni-Co layered hydroxide/oxyhydroxide species (NiOOH) in comparison with spinal NixCo3-xO4 during the electrochemical process. In addtion, the Ni3+-rich surface together with Co incorporation facilitates the formation of β-NiOOH. Our study reveals that control of active species on NiCoON NSAs/NF leads to high activity and stability in OER catalysis.

KW - Electrocatalysis

KW - Nanosheet array

KW - NiCo nanocomposite

KW - Oxygen evolution reaction

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U2 - 10.1016/j.nanoen.2018.08.010

DO - 10.1016/j.nanoen.2018.08.010

M3 - 文章

AN - SCOPUS:85051389795

SN - 2211-2855

VL - 52

SP - 360

EP - 368

JO - Nano Energy

JF - Nano Energy

ER -

Ni/Co-based nanosheet arrays for efficient oxygen evolution reaction

Abstract

Keywords

UN SDGs

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