Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation

Guang Feng; Yun Kuang; Yingjie Li; Xiaoming Sun

doi:10.1007/s12274-015-0836-5

Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation

Guang Feng, Yun Kuang, Yingjie Li, Xiaoming Sun^*

^*Corresponding author for this work

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

73 Citations (Scopus)

Abstract

Finding inexpensive electrodes with high activity and stability is key to realize the practical application of fuel cells. Here, we report the fabrication of three-dimensional (3D) porous nickel nanoflower (3D-PNNF) electrodes via an in situ reduction method. The 3D-PNNF electrodes have a high surface area, show tight binding to the electroconductive substrate, and most importantly, have superaerophobic (bubble repellent) surfaces. Therefore, the electrocatalytic hydrazine oxidation performance of the 3D-PNNF electrodes was much higher than that of commercial Pt/C catalysts because of its ultra-weak gas-bubble adhesion and ultra-fast gas-bubble release. Furthermore, the 3D-PNNF electrodes showed ultra-high stability even under a high current density (260 mA/cm²), which makes it promising for practical applications. In addition, the construction of superaerophobic nanostructures could also be beneficial for other gas evolution processes (e.g., hydrogen evolution reaction). [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	3365-3371
Number of pages	7
Journal	Nano Research
Volume	8
Issue number	10
DOIs	https://doi.org/10.1007/s12274-015-0836-5
Publication status	Published - 1 Oct 2015
Externally published	Yes

Keywords

electrocatalysis
Ni nanoflower
three-dimensional (3D) porous
ultra-high stability

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title = "Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation",

abstract = "Finding inexpensive electrodes with high activity and stability is key to realize the practical application of fuel cells. Here, we report the fabrication of three-dimensional (3D) porous nickel nanoflower (3D-PNNF) electrodes via an in situ reduction method. The 3D-PNNF electrodes have a high surface area, show tight binding to the electroconductive substrate, and most importantly, have superaerophobic (bubble repellent) surfaces. Therefore, the electrocatalytic hydrazine oxidation performance of the 3D-PNNF electrodes was much higher than that of commercial Pt/C catalysts because of its ultra-weak gas-bubble adhesion and ultra-fast gas-bubble release. Furthermore, the 3D-PNNF electrodes showed ultra-high stability even under a high current density (260 mA/cm2), which makes it promising for practical applications. In addition, the construction of superaerophobic nanostructures could also be beneficial for other gas evolution processes (e.g., hydrogen evolution reaction). [Figure not available: see fulltext.]",

keywords = "electrocatalysis, Ni nanoflower, three-dimensional (3D) porous, ultra-high stability",

author = "Guang Feng and Yun Kuang and Yingjie Li and Xiaoming Sun",

note = "Publisher Copyright: {\textcopyright} 2015, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.",

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doi = "10.1007/s12274-015-0836-5",

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AU - Feng, Guang

AU - Kuang, Yun

AU - Li, Yingjie

AU - Sun, Xiaoming

PY - 2015/10/1

Y1 - 2015/10/1

N2 - Finding inexpensive electrodes with high activity and stability is key to realize the practical application of fuel cells. Here, we report the fabrication of three-dimensional (3D) porous nickel nanoflower (3D-PNNF) electrodes via an in situ reduction method. The 3D-PNNF electrodes have a high surface area, show tight binding to the electroconductive substrate, and most importantly, have superaerophobic (bubble repellent) surfaces. Therefore, the electrocatalytic hydrazine oxidation performance of the 3D-PNNF electrodes was much higher than that of commercial Pt/C catalysts because of its ultra-weak gas-bubble adhesion and ultra-fast gas-bubble release. Furthermore, the 3D-PNNF electrodes showed ultra-high stability even under a high current density (260 mA/cm2), which makes it promising for practical applications. In addition, the construction of superaerophobic nanostructures could also be beneficial for other gas evolution processes (e.g., hydrogen evolution reaction). [Figure not available: see fulltext.]

AB - Finding inexpensive electrodes with high activity and stability is key to realize the practical application of fuel cells. Here, we report the fabrication of three-dimensional (3D) porous nickel nanoflower (3D-PNNF) electrodes via an in situ reduction method. The 3D-PNNF electrodes have a high surface area, show tight binding to the electroconductive substrate, and most importantly, have superaerophobic (bubble repellent) surfaces. Therefore, the electrocatalytic hydrazine oxidation performance of the 3D-PNNF electrodes was much higher than that of commercial Pt/C catalysts because of its ultra-weak gas-bubble adhesion and ultra-fast gas-bubble release. Furthermore, the 3D-PNNF electrodes showed ultra-high stability even under a high current density (260 mA/cm2), which makes it promising for practical applications. In addition, the construction of superaerophobic nanostructures could also be beneficial for other gas evolution processes (e.g., hydrogen evolution reaction). [Figure not available: see fulltext.]

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KW - ultra-high stability

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Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation

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Keywords

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