A New Member of Electrocatalysts Based on Nickel Metaphosphate Nanocrystals for Efficient Water Oxidation

High‐performance electrocatalysts are desired for electrochemical energy conversion, especially in the field of water splitting. Here, a new member of phosphate electrocatalysts, nickel metaphosphate (Ni2P4O12) nanocrystals, is reported, exhibiting low overpotential of 270 mV to generate the current...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2018-02, Vol.30 (5), p.n/a
Main Authors: Huang, Jianwen, Sun, Yinghui, Zhang, Yadong, Zou, Guifu, Yan, Chaoyi, Cong, Shan, Lei, Tianyu, Dai, Xiao, Guo, Jun, Lu, Ruifeng, Li, Yanrong, Xiong, Jie
Format: Article
Language:English
Subjects:
Catalysis
Charge transfer
Chemical evolution
Electrocatalysts
Electronic structure
Energy conversion
Materials science
Nanocrystals
Nickel
nickel metaphosphate
N‐doped
Oxidation
oxygen evolution
Water splitting
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Summary:High‐performance electrocatalysts are desired for electrochemical energy conversion, especially in the field of water splitting. Here, a new member of phosphate electrocatalysts, nickel metaphosphate (Ni2P4O12) nanocrystals, is reported, exhibiting low overpotential of 270 mV to generate the current density of 10 mA cm−2 and a superior catalytic durability of 100 h. It is worth noting that Ni2P4O12 electrocatalyst has remarkable oxygen evolution performance operating in basic media. Further experimental and theoretical analyses demonstrate that N dopant boosts the catalytic performance of Ni2P4O12 due to optimizing the surface electronic structure for better charge transfer and decreasing the adsorption energy for the oxygenic intermediates. A new type of nickel metaphosphate nanocrystal electrocatalyst exhibits high oxygen evolution reaction performance due to exposed active facets. Experimental and theoretical analyses demonstrate that N doping further boosts the catalytic activity via modifying the electronic structure and facilitating the formation of OO bonding.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201705045