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Issue 16, 2019
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Ultrathin mesoporous F-doped α-Ni(OH)2 nanosheets as an efficient electrode material for water splitting and supercapacitors

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Abstract

Two-dimensional (2D) nanomaterials with a high specific surface area and mesoporous nature are attractive and have wide applications in catalysis, energy storage systems, etc. Here, we report a novel strategy to fabricate noble metal-free, F-doped α-Ni(OH)2 mesoporous 2D ultrathin nanosheets. The F-doped α-Ni(OH)2 nanosheets exhibit remarkable electrocatalytic activity and stability for the oxygen evolution reaction, achieving a low onset potential (260 mV), high mass activity (69.1 A g−1 at η = 350 mV) and low Tafel slope (31.89 mV dec−1), which are superior to those of commercial RuO2 catalysts. Simultaneously, F-doped α-Ni(OH)2 nanosheets are found to have a high specific capacitance of 158.75 F g−1 at 1 A g−1 with a maximum energy density of 67.4 W h kg−1 at a power density of 400 W kg−1, which could still retain 40 W h kg−1 at a power density of 16 kW kg−1. DFT calculations rationalize that F doped α-Ni(OH)2 favors electrical conductivity, efficient electron transport and water adsorption. It could be envisioned that the proposed simple and efficient approach will pave a new way to synthesize other anion doped 2D materials for energy conversion and storage technology.

Graphical abstract: Ultrathin mesoporous F-doped α-Ni(OH)2 nanosheets as an efficient electrode material for water splitting and supercapacitors

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Publication details

The article was received on 26 Jan 2019, accepted on 14 Mar 2019 and first published on 14 Mar 2019


Article type: Paper
DOI: 10.1039/C9TA01017C
J. Mater. Chem. A, 2019,7, 9656-9664

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    Ultrathin mesoporous F-doped α-Ni(OH)2 nanosheets as an efficient electrode material for water splitting and supercapacitors

    N. Hussain, W. Yang, J. Dou, Y. Chen, Y. Qian and L. Xu, J. Mater. Chem. A, 2019, 7, 9656
    DOI: 10.1039/C9TA01017C

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