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Facile Synthesis of Cu Doped Cobalt Hydroxide Nano-sheets for Efficient Electrocatalytic Oxygen Evolution

Abstract

We report herein the facile synthesis of cobalt hydroxide nano-sheets with a uniform ultrathin structure under a mild condition. By doping heteroatoms such as Cu, the nanosheets’ morphology and dimension can be well-modulated. The prepared heteroatoms-doped cobalt hydroxide nano-sheets exhibit excellent catalytic activity and durability toward the oxygen evolution reaction (OER). Specially, Cu-doped cobalt hydroxide (Cu-Co(OH)2) shows an electrocatalytic current density of 10 mA cm-2 and a mass activity of 46 A g-1 at overpotential of 300 mV, and a Tafel slope of 47 mV dec-1, which are markedly higher than those of the state-of-the-art IrO2. Importantly, X-ray photoelectron spectroscopy (XPS) suggests the modulated electronic structure by the heteroatoms doping, which results in elevated Co ion valence and is thus in favor of OER performance. This work presents a green and facile strategy for the synthesis of heteroatoms in situ doped ultrathin hydroxides which are of excellent performance for OER. Possible OER mechanism for heteroatoms doped samples has also been proposed.

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Publication details

The article was received on 30 Aug 2017, accepted on 03 Oct 2017 and first published on 03 Oct 2017


Article type: Paper
DOI: 10.1039/C7TA07637A
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Facile Synthesis of Cu Doped Cobalt Hydroxide Nano-sheets for Efficient Electrocatalytic Oxygen Evolution

    L. Chen, H. Zhang, L. Chen, X. Wei, J. Shi and M. He, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA07637A

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