Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells

Xiaojiao Zhu; Xinyu Dou; Jun Dai; Xingda An; Yuqiao Guo; Lidong Zhang; Shi Tao; Jiyin Zhao; Wangsheng Chu; Xiao Cheng Zeng; Changzheng Wu; Yi Xie

doi:10.1002/anie.201606313

Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells

Xiaojiao Zhu, Xinyu Dou, Jun Dai, Xingda An, Yuqiao Guo, Lidong Zhang, Shi Tao, Jiyin Zhao, Wangsheng Chu, Xiao Cheng Zeng, Changzheng Wu, Yi Xie

Chemistry

Research output: Contribution to journal › Article

146 Scopus citations

Abstract

The direct urea fuel cell (DUFC) is an important but challenging renewable energy production technology, it offers great promise for energy-sustainable developments and mitigating water contamination. However, DUFCs still suffer from the sluggish kinetics of the urea oxidation reaction (UOR) owing to a 6 e⁻transfer process, which poses a severe hindrance to their practical use. Herein, taking β-Ni(OH)₂nanosheets as the proof-of-concept study, we demonstrated a surface-chemistry strategy to achieve metallic Ni(OH)₂nanosheets by engineering their electronic structure, representing a first metallic configuration of transition-metal hydroxides. Surface sulfur incorporation successfully brings synergetic effects of more exposed active sites, good wetting behavior, and effective electron transport, giving rise to greatly enhanced performance for UOR. Metallic nanosheets exhibited a much higher current density, smaller onset potential and stronger durability.

Original language	English (US)
Pages (from-to)	12465-12469
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	55
Issue number	40
DOIs	https://doi.org/10.1002/anie.201606313
State	Published - 2016

Keywords

fuel cells
metallic transition-metal hydroxide
nanosheets
sulfur
urea oxidation reaction

ASJC Scopus subject areas

Catalysis
Chemistry(all)

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Zhu, X., Dou, X., Dai, J., An, X., Guo, Y., Zhang, L., Tao, S., Zhao, J., Chu, W., Zeng, X. C., Wu, C., & Xie, Y. (2016). Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells. Angewandte Chemie - International Edition, 55(40), 12465-12469. https://doi.org/10.1002/anie.201606313

Metallic Nickel Hydroxide Nanosheets Give Superior Electrocatalytic Oxidation of Urea for Fuel Cells. / Zhu, Xiaojiao; Dou, Xinyu; Dai, Jun; An, Xingda; Guo, Yuqiao; Zhang, Lidong; Tao, Shi; Zhao, Jiyin; Chu, Wangsheng; Zeng, Xiao Cheng; Wu, Changzheng; Xie, Yi.

In: Angewandte Chemie - International Edition, Vol. 55, No. 40, 2016, p. 12465-12469.

Research output: Contribution to journal › Article

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abstract = "The direct urea fuel cell (DUFC) is an important but challenging renewable energy production technology, it offers great promise for energy-sustainable developments and mitigating water contamination. However, DUFCs still suffer from the sluggish kinetics of the urea oxidation reaction (UOR) owing to a 6 e−transfer process, which poses a severe hindrance to their practical use. Herein, taking β-Ni(OH)2nanosheets as the proof-of-concept study, we demonstrated a surface-chemistry strategy to achieve metallic Ni(OH)2nanosheets by engineering their electronic structure, representing a first metallic configuration of transition-metal hydroxides. Surface sulfur incorporation successfully brings synergetic effects of more exposed active sites, good wetting behavior, and effective electron transport, giving rise to greatly enhanced performance for UOR. Metallic nanosheets exhibited a much higher current density, smaller onset potential and stronger durability.",

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author = "Xiaojiao Zhu and Xinyu Dou and Jun Dai and Xingda An and Yuqiao Guo and Lidong Zhang and Shi Tao and Jiyin Zhao and Wangsheng Chu and Zeng, {Xiao Cheng} and Changzheng Wu and Yi Xie",

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AU - Zhang, Lidong

AU - Tao, Shi

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