Volume 54, Issue 28 pp. 8188-8192
Communication

One-Step Synthesis of Self-Supported Nickel Phosphide Nanosheet Array Cathodes for Efficient Electrocatalytic Hydrogen Generation

Dr. Xiaoguang Wang

Dr. Xiaoguang Wang

International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga (Portugal)

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Dr. Yury V. Kolen'ko

Dr. Yury V. Kolen'ko

International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga (Portugal)

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Dr. Xiao-Qing Bao

Dr. Xiao-Qing Bao

International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga (Portugal)

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Prof. Dr. Kirill Kovnir

Prof. Dr. Kirill Kovnir

Department of Chemistry, University of California, Davis, Davis, CA 95616 (USA)

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Dr. Lifeng Liu

Corresponding Author

Dr. Lifeng Liu

International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga (Portugal)

International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga (Portugal)Search for more papers by this author
First published: 01 June 2015
Citations: 513

X.G.W. and L.F.L. acknowledge financial support of Marie-Curie COFUND programme (NanoTrainforGrowth). L.F.L. acknowledges financial support of the FCT Investigator grant (No. IF/01595/2014). Y.V.K. thanks Dr. L. M. Salonen and Prof. P. P. Freitas for helpful discussions.

Graphical Abstract

Hydrogen generation on self-supported three-dimensional nickel phosphide nanosheet array cathodes is reported. The nanosheets have been fabricated by direct phosphorization of commercial nickel foams using phosphorus vapor and show superior electrocatalytic activity and stability in acidic medium toward H2 generation.

Abstract

Nickel phosphide is an emerging low-cost, earth-abundant catalyst that can efficiently reduce water to generate hydrogen. However, the synthesis of nickel phosphide catalysts usually involves multiple steps and is laborious. Herein, a convenient and straightforward approach to the synthesis of a three-dimensional (3D) self-supported biphasic Ni5P4-Ni2P nanosheet (NS) array cathode is presented, which is obtained by direct phosphorization of commercially available nickel foam using phosphorus vapor. The synthesized 3D Ni5P4-Ni2P-NS array cathode exhibits outstanding electrocatalytic activity and long-term durability toward the hydrogen evolution reaction (HER) in acidic medium. The fabrication procedure reported here is scalable, showing substantial promise for use in water electrolysis. More importantly, the approach can be readily extended to synthesize other self-supported transition metal phosphide HER cathodes.

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