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Well-aligned metal–organic framework array-derived CoS2 nanosheets toward robust electrochemical water splitting

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Abstract

Exploring high-efficiency and stable nonprecious bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is highly desirable but still challenging. Herein, we develop a versatile approach for the rational design and fabrication of highly open three-dimensional (3D) hierarchical architectures composed of two-dimensional (2D) CoS2 nanosheets grown on carbon cloth (CoS2 NS/CC) by vulcanizing well-aligned MOF-array precursors. Benefiting from the unique morphology with a high surface area, high density of active sites, and enhanced mass/electrolyte transfer, as well as facile release of the evolved gas, the as-synthesized CoS2 NS/CC exhibits superior catalytic performance and excellent durability for both the HER and OER. Furthermore, when used as a bifunctional electrocatalyst toward overall water splitting, a low cell voltage of 1.58 V is achieved at the current density of 10 mA cm−2 with long-term stability.

Graphical abstract: Well-aligned metal–organic framework array-derived CoS2 nanosheets toward robust electrochemical water splitting

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Publication details

The article was received on 28 May 2018, accepted on 30 Jul 2018 and first published on 31 Jul 2018


Article type: Research Article
DOI: 10.1039/C8QM00259B
Citation: Mater. Chem. Front., 2018, Advance Article
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    Well-aligned metal–organic framework array-derived CoS2 nanosheets toward robust electrochemical water splitting

    N. Yao, T. Tan, F. Yang, G. Cheng and W. Luo, Mater. Chem. Front., 2018, Advance Article , DOI: 10.1039/C8QM00259B

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