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Wafer-scale 1-nm Ni(OH)2 Nanosheet with Superior Electrocatalytic activity for Oxygen Evolution Reaction

Abstract

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 oxygen evolution reaction (OER). At the current density of 10 mA/cm2, the overpotential reached 295 mV(vs. RHE) in a Fe-rich 1M NaOH. This 1.4 nm Ni(OH)2 nanosheet showed a very high turnover frequency of 5.47s-1 and a mass activity of more than 2×104 A/g at an overpotential of 300 mV. Such a high electrocatalytic 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 electrochemical catalyst’s mass efficacy, which is particularly valuable for preserving rare and precious catalyst materials.

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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, Accepted Manuscript
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    Wafer-scale 1-nm Ni(OH)2 Nanosheet with Superior Electrocatalytic activity for Oxygen Evolution Reaction

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

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