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Vanadium Doped Nickel Phosphide Nanosheets Self‐Assembled Microspheres as a High‐Efficiency Oxygen Evolution Catalyst
Author(s) -
Li Yao,
Jiang Xiaoli,
Miao Zhuang,
Tang Jiaruo,
Zheng Qiaoji,
Xie Fengyu,
Lin Dunmin
Publication year - 2020
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201901904
Subject(s) - overpotential , phosphide , oxygen evolution , vanadium , catalysis , nickel , materials science , electrochemistry , chemical engineering , inorganic chemistry , electrocatalyst , water splitting , electrode , chemistry , metallurgy , photocatalysis , organic chemistry , engineering
Recently, much attention has been paid to the low‐cost, high‐efficiency and stable non‐precious metal catalysts for oxygen evolution reaction (OER). In this work, vanadium (V)‐doped nickel phosphide (Ni 2 P) nanosheets self‐assembled microspheres supported on nickel foam (Ni 1 V 1 P NSs/NF) were synthesized as a novel OER catalyst by combined processes of hydrothermal method and low‐temperature phosphorization. The synthesized Ni 1 V 1 P NSs/NF material shows excellent catalytic activity due to its interconnected three‐dimensional (3D) structure and synergistic effect between nickel and vanadium. When used as a catalyst electrode for OER, the synthesized Ni 1 V 1 P NSs/NF exhibits excellent electrocatalytic activity, reaching a current density of 50 mA cm −2 at the low overpotential of 250 mV in 1.0 M KOH. This material also shows superior electrochemical stability with negligible decay of the activity after continual measurement for 15 h at 50 and 100 mA cm −2 in 1.0 M KOH, respectively. This work provides a valuable method to synthesize efficient OER catalysts by doping valence‐variable metal ions and designing distinctive 3D structure.