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Construction of Amorphous Interface in NiS/NiS2 Interwoven Structure for Enhanced Overall Water Splitting

Abstract

Here, we describe the synthesis of the novel NiS/NiS2 interwoven structure with amorphous interface through one-step thermal decomposition of nickel sulfate and thiourea. The partial phase transition from NiS2 to NiS induced the amorphous interface in NiS/NiS2 is expected to separate the H* and H- intermediates on different interface sites, reduce the interfacial energy and charge transfer resistance as well. When applied NiS/NiS2 as electrocatalyst for overall water splitting (OWS), it achieved a geometrical current density of 100 mA cm-2 at low overpotential of 248 mV for hydrogen evolution reaction (HER) and 416 mV for oxygen evolution reaction (OER), which is obviously superior to that of the single phase catalysts. In addition, it also can be employed as efficient bifunctional catalyst for OWS with 10 mA cm-2 at a voltage of 1.62 V.

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Publication details

The article was received on 28 Feb 2018, accepted on 16 Apr 2018 and first published on 17 Apr 2018


Article type: Communication
DOI: 10.1039/C8TA01928B
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Construction of Amorphous Interface in NiS/NiS2 Interwoven Structure for Enhanced Overall Water Splitting

    Q. Li, D. Wang, C. Han, X. Ma, Q. Lu, Z. Xing and X. Yang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA01928B

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