TY - JOUR
T1 - General Strategy for Preparation of Porous Nickel Phosphide Nanosheets on Arbitrary Substrates toward Efficient Hydrogen Generation
AU - Hu, Cun
AU - Cai, Jinguang
AU - Liu, Shuai
AU - Lv, Chao
AU - Luo, Junhong
AU - Duan, Ming
AU - Chen, Changan
AU - Shi, Yan
AU - Song, Jiangfeng
AU - Zhang, Zhi
AU - Watanabe, Akira
AU - Aoyagi, Eiji
AU - Ito, Shun
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (No. 21603201, 21703177), Institute of Materials, China Academy of Engineering Physics (Item No. TP02201303), and JSPS KAKENHI Grant Number JP15H04132 and JSPS KAKENHI Grant Number JP19H05356.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2020/1/27
Y1 - 2020/1/27
N2 - Nickel phosphides have been widely explored for electrocatalytic hydrogen evolution reaction (HER) due to their high activity and durability. To date, however, it is still a big challenge to develop facile and scalable approaches to preparing nickel phosphide structures with high HER performance for practical applications. Here, a general strategy is demonstrated for facile preparation of porous nickel phosphide nanosheets on arbitrary substrates by electroless Ni plating on the substrate followed by a convenient and stable phosphidation reaction. Typical porous nickel phosphide nanosheets (Ni5P4/NiP2/Ni2P) supported on carbon cloth show excellent electrocatalytic HER activities in acidic electrolyte with very small overpotentials of 63 mV and 120 mV to attain current densities of 10 mA cm-2 and 100 mA cm-2, respectively, and a very low Tafel slope of 47.3 mV dec-1, which are among the best results compared to other non-noble HER electrocatalysts. Furthermore, the electrode exhibits superior flexibility and outstanding durability with negligible degradation under either an accelerated degradation test for 5000 cyclic voltammetry cycles or a durability test under a constant current density of 10 mA cm-2 for 168 h. The excellent HER performance is contributed by the high specific surface area of porous nanosheets and the synergistic effect among Ni5P4, NiP2, and Ni2P phases. Besides, the porous nickel phosphide nanosheets grown on a large-area carbon cloth film via the same method show nearly the same high HER activities, suggesting a high potential for practical application. In addition, this strategy is employed to prepare porous nickel phosphide nanostructures on arbitrary substrates, even elaborate leaf vein and silkworm cocoon, with remarkable HER activities. The preparation method reported here is practical and scalable and can be extended to produce transition-metal-based structures on appropriate substrates for various applications.
AB - Nickel phosphides have been widely explored for electrocatalytic hydrogen evolution reaction (HER) due to their high activity and durability. To date, however, it is still a big challenge to develop facile and scalable approaches to preparing nickel phosphide structures with high HER performance for practical applications. Here, a general strategy is demonstrated for facile preparation of porous nickel phosphide nanosheets on arbitrary substrates by electroless Ni plating on the substrate followed by a convenient and stable phosphidation reaction. Typical porous nickel phosphide nanosheets (Ni5P4/NiP2/Ni2P) supported on carbon cloth show excellent electrocatalytic HER activities in acidic electrolyte with very small overpotentials of 63 mV and 120 mV to attain current densities of 10 mA cm-2 and 100 mA cm-2, respectively, and a very low Tafel slope of 47.3 mV dec-1, which are among the best results compared to other non-noble HER electrocatalysts. Furthermore, the electrode exhibits superior flexibility and outstanding durability with negligible degradation under either an accelerated degradation test for 5000 cyclic voltammetry cycles or a durability test under a constant current density of 10 mA cm-2 for 168 h. The excellent HER performance is contributed by the high specific surface area of porous nanosheets and the synergistic effect among Ni5P4, NiP2, and Ni2P phases. Besides, the porous nickel phosphide nanosheets grown on a large-area carbon cloth film via the same method show nearly the same high HER activities, suggesting a high potential for practical application. In addition, this strategy is employed to prepare porous nickel phosphide nanostructures on arbitrary substrates, even elaborate leaf vein and silkworm cocoon, with remarkable HER activities. The preparation method reported here is practical and scalable and can be extended to produce transition-metal-based structures on appropriate substrates for various applications.
KW - arbitrary substrates
KW - electroless nickel plating
KW - hydrogen evolution reaction
KW - phosphidation reaction
KW - porous nickel phosphide nanosheets
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U2 - 10.1021/acsaem.9b02067
DO - 10.1021/acsaem.9b02067
M3 - Article
AN - SCOPUS:85078745263
VL - 3
SP - 1036
EP - 1045
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
SN - 2574-0962
IS - 1
ER -