Controlled growth of porous oxygen-deficient NiCo2O4nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction

Shangzhi Yao; Haoshan Wei; Yong Zhang; Xueru Zhang; Yan Wang; Jiaqin Liu; Hark Hoe Tan; Ting Xie; Yucheng Wu

doi:10.1039/d0cy01669a

Controlled growth of porous oxygen-deficient NiCo₂O₄nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction

Shangzhi Yao, Haoshan Wei, Yong Zhang^*, Xueru Zhang, Yan Wang, Jiaqin Liu, Hark Hoe Tan, Ting Xie, Yucheng Wu^*

^*Corresponding author for this work

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

21 Citations (Scopus)

Abstract

Owing to their distinctive chemical properties and cost-effectiveness, transition metal oxides (TMOs) promise intriguing potential in electrocatalysis applications. Herein, porous NiCo2O4 nanobelts with controlled oxygen deficiencies were synthesized based on a facile strategy of hydrothermal growth followed by annealing under an inert atmosphere. By finely adjusting annealing temperature and time, concentrations of oxygen deficiencies within the nanobelts could be modulated. The oxygen-deficient NiCo2O4 nanobelts exhibit superior oxygen evolution reaction (OER) performance at a relatively low overpotential which is superior to the values of prepared pristine NiCo2O4 electrocatalysts. In particular, they show excellent stability for 10 h at 10 mA cm-2. The enhanced OER activity and stability of the catalyst can be ascribed to the abundant oxygen deficiencies as well as porous architecture of the anisotropic nanobelts. This work paves a promising way in fabricating advanced electrocatalysts.

Original language	English
Pages (from-to)	264-271
Number of pages	8
Journal	Catalysis Science and Technology
Volume	11
Issue number	1
DOIs	https://doi.org/10.1039/d0cy01669a
Publication status	Published - 7 Jan 2021

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title = "Controlled growth of porous oxygen-deficient NiCo2O4nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction",

abstract = "Owing to their distinctive chemical properties and cost-effectiveness, transition metal oxides (TMOs) promise intriguing potential in electrocatalysis applications. Herein, porous NiCo2O4 nanobelts with controlled oxygen deficiencies were synthesized based on a facile strategy of hydrothermal growth followed by annealing under an inert atmosphere. By finely adjusting annealing temperature and time, concentrations of oxygen deficiencies within the nanobelts could be modulated. The oxygen-deficient NiCo2O4 nanobelts exhibit superior oxygen evolution reaction (OER) performance at a relatively low overpotential which is superior to the values of prepared pristine NiCo2O4 electrocatalysts. In particular, they show excellent stability for 10 h at 10 mA cm-2. The enhanced OER activity and stability of the catalyst can be ascribed to the abundant oxygen deficiencies as well as porous architecture of the anisotropic nanobelts. This work paves a promising way in fabricating advanced electrocatalysts.",

author = "Shangzhi Yao and Haoshan Wei and Yong Zhang and Xueru Zhang and Yan Wang and Jiaqin Liu and Tan, {Hark Hoe} and Ting Xie and Yucheng Wu",

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T1 - Controlled growth of porous oxygen-deficient NiCo2O4nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction

AU - Yao, Shangzhi

AU - Wei, Haoshan

AU - Zhang, Yong

AU - Zhang, Xueru

AU - Wang, Yan

AU - Liu, Jiaqin

AU - Tan, Hark Hoe

AU - Xie, Ting

AU - Wu, Yucheng

PY - 2021/1/7

Y1 - 2021/1/7

N2 - Owing to their distinctive chemical properties and cost-effectiveness, transition metal oxides (TMOs) promise intriguing potential in electrocatalysis applications. Herein, porous NiCo2O4 nanobelts with controlled oxygen deficiencies were synthesized based on a facile strategy of hydrothermal growth followed by annealing under an inert atmosphere. By finely adjusting annealing temperature and time, concentrations of oxygen deficiencies within the nanobelts could be modulated. The oxygen-deficient NiCo2O4 nanobelts exhibit superior oxygen evolution reaction (OER) performance at a relatively low overpotential which is superior to the values of prepared pristine NiCo2O4 electrocatalysts. In particular, they show excellent stability for 10 h at 10 mA cm-2. The enhanced OER activity and stability of the catalyst can be ascribed to the abundant oxygen deficiencies as well as porous architecture of the anisotropic nanobelts. This work paves a promising way in fabricating advanced electrocatalysts.

AB - Owing to their distinctive chemical properties and cost-effectiveness, transition metal oxides (TMOs) promise intriguing potential in electrocatalysis applications. Herein, porous NiCo2O4 nanobelts with controlled oxygen deficiencies were synthesized based on a facile strategy of hydrothermal growth followed by annealing under an inert atmosphere. By finely adjusting annealing temperature and time, concentrations of oxygen deficiencies within the nanobelts could be modulated. The oxygen-deficient NiCo2O4 nanobelts exhibit superior oxygen evolution reaction (OER) performance at a relatively low overpotential which is superior to the values of prepared pristine NiCo2O4 electrocatalysts. In particular, they show excellent stability for 10 h at 10 mA cm-2. The enhanced OER activity and stability of the catalyst can be ascribed to the abundant oxygen deficiencies as well as porous architecture of the anisotropic nanobelts. This work paves a promising way in fabricating advanced electrocatalysts.

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DO - 10.1039/d0cy01669a

M3 - Article

SN - 2044-4753

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SP - 264

EP - 271

JO - Catalysis Science and Technology

JF - Catalysis Science and Technology

IS - 1

ER -

Controlled growth of porous oxygen-deficient NiCo₂O₄nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction

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