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A New Member of Electrocatalysts Based on Nickel Metaphosphate Nanocrystals for Efficient Water Oxidation
Author(s) -
Huang Jianwen,
Sun Yinghui,
Zhang Yadong,
Zou Guifu,
Yan Chaoyi,
Cong Shan,
Lei Tianyu,
Dai Xiao,
Guo Jun,
Lu Ruifeng,
Li Yanrong,
Xiong Jie
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201705045
Subject(s) - overpotential , metaphosphate , electrocatalyst , materials science , oxygen evolution , catalysis , nickel , nanocrystal , water splitting , electrochemistry , chemical engineering , dopant , inorganic chemistry , electrochemical energy conversion , nanotechnology , phosphate , electrode , chemistry , metallurgy , photocatalysis , doping , optoelectronics , organic chemistry , engineering
Abstract 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 (Ni 2 P 4 O 12 ) 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 Ni 2 P 4 O 12 electrocatalyst has remarkable oxygen evolution performance operating in basic media. Further experimental and theoretical analyses demonstrate that N dopant boosts the catalytic performance of Ni 2 P 4 O 12 due to optimizing the surface electronic structure for better charge transfer and decreasing the adsorption energy for the oxygenic intermediates.