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Highly efficient and durable water oxidation in near-neutral carbonate electrolyte electrocatalyzed by core-shell structured NiO@Ni-Ci nanosheet array

Abstract

The development of cost-effective and high-performance water oxidation electrocatalysts operating in carbonate (Ci) electrolyte is highly desired but still remains a great challenge. In this communication, we report the in situ elelectrochemical development of amorphous Ni-Ci layer on NiO nanosheet array supported on carbon cloth (NiO@Ni-Ci/CC) as a 3D catalyst electrode for water oxidation in 1.0 M KHCO3 (pH: 8.3). To drive a geometrical catalytic current density of 15 mA cm-2, such core-shell structured NiO@Ni-Ci/CC only demands overpotential of 387 mV, with its catalytic activity being maintained for at least 25 h. And at overpotential of 500 mV, this catalyst electrode achieves a high turnover frequency of 0.21 mol O2 s-1.

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Publication details

The article was received on 25 Apr 2017, accepted on 19 May 2017 and first published on 19 May 2017


Article type: Communication
DOI: 10.1039/C7SE00218A
Citation: Sustainable Energy Fuels, 2017, Accepted Manuscript
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    Highly efficient and durable water oxidation in near-neutral carbonate electrolyte electrocatalyzed by core-shell structured NiO@Ni-Ci nanosheet array

    M. Ma, Y. Liu, X. Ma, R. Ge, F. Qu, Z. Liu, G. Du, A. M. Asiri, Y. yao and X. Sun, Sustainable Energy Fuels, 2017, Accepted Manuscript , DOI: 10.1039/C7SE00218A

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