Self-assembled Cu-Ni bimetal oxide 3D in-plane epitaxial structures for highly efficient oxygen evolution reaction

[Display omitted] •A novel self-assembly method for the fabrication of 3D nest-like structured electrode.•The coplanar growth of Cu(OH)2 and Ni2O3H across the single nano-wires.•The synergistic effort between Cu and Ni leading to a superior electrocatalyst of CuO-NiO/NF. To improve the catalytic act...

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Bibliographic Details
Published in:Applied catalysis. B, Environmental Environmental, 2019-05, Vol.244, p.56-62
Main Authors: Li, Chaojiang, Zhang, Bowei, Li, Yong, Hao, Shiji, Cao, Xun, Yang, Guang, Wu, Junsheng, Huang, Yizhong
Format: Article
Language:English
Subjects:
3D porous electrode
Annealing furnaces
Bimetals
Catalysis
Catalytic activity
Cathodes
Copper
Copper oxides
Electrochemistry
Electrodes
Evolution
Liquid plasma discharge
Metal foams
Nickel
Nickel oxides
Oxides
Oxygen
Oxygen evolution reaction
Oxygen evolution reactions
Plasma jets
Self-assembly
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Summary:[Display omitted] •A novel self-assembly method for the fabrication of 3D nest-like structured electrode.•The coplanar growth of Cu(OH)2 and Ni2O3H across the single nano-wires.•The synergistic effort between Cu and Ni leading to a superior electrocatalyst of CuO-NiO/NF. To improve the catalytic activity of copper based electrode for oxygen evolution reaction (OER), double cathodes liquid plasma discharge (DC-LPD) method was developed to fabricate three-dimensional (3D) nest-like structures electrode on the nickel foam (NF). The CuO-NiO/NF electrode obtained through annealing the in-plane epitaxial Cu(OH)2-Ni2O3H/NF in the oven, exhibits excellent electrocatalytic activities for the oxygen evolution reaction at a low overpotential of 319 mV to achieve a current density of 10 mA/cm2. The electrochemically active surface area (ECSA) of CuO-NiO/NF is over 2 times larger than that of Cu(OH)2-Ni2O3H/NF electrode. The synergistic effort between Cu and Ni makes the CuO-NiO/NF electrode a superior electrocatalyst with improved activity and stability as compared to the single NiO/NF electrode.
ISSN:0926-3373
1873-3883
DOI:10.1016/j.apcatb.2018.11.046