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Issue 11, 2018
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A wafer-scale 1 nm Ni(OH)2 nanosheet with superior electrocatalytic activity for the oxygen evolution reaction

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Abstract

A wafer-scale 1.4 nm ultrathin Ni(OH)2 nanosheet was synthesized by ionic layer epitaxy. This free-standing Ni(OH)2 nanosheet was directly used to catalyze the oxygen evolution reaction (OER). At a current density of 10 mA cm−2, the overpotential reached 295 mV (vs. RHE) in Fe-rich 1 M NaOH. This 1.4 nm Ni(OH)2 nanosheet showed a very high turnover frequency of 5.47 s−1 and a mass activity of more than 2 × 104 A g−1 at an overpotential of 300 mV. Such a high electrocatalytic mass activity of the Ni(OH)2 nanosheet was more than 2 orders of magnitude higher than those of typical OER catalysts. The capability of producing wafer-scale nanometer-thick nanosheets offers a promising strategy to improve the mass efficiency of electrochemical catalysts, which is particularly valuable for preserving rare and precious catalyst materials.

Graphical abstract: A wafer-scale 1 nm Ni(OH)2 nanosheet with superior electrocatalytic activity for the oxygen evolution reaction

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Publication details

The article was received on 05 Dec 2017, accepted on 11 Feb 2018 and first published on 12 Feb 2018


Article type: Communication
DOI: 10.1039/C7NR09042K
Citation: Nanoscale, 2018,10, 5054-5059
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    A wafer-scale 1 nm Ni(OH)2 nanosheet with superior electrocatalytic activity for the oxygen evolution reaction

    P. Tian, Y. Yu, X. Yin and X. Wang, Nanoscale, 2018, 10, 5054
    DOI: 10.1039/C7NR09042K

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