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Controlled Construction for Ternary Hybrid of Monodisperse Ni3S4 Nanorods/Graphitic C3N4 Nanosheets/Nitrogen-Doped Graphene in van der Waals Heterojunctions as Highly Efficient Electrocatalysis for Overall Water Splitting and Promising Anode Material for Sodium-Ion Batteries

Abstract

As a kind of novel multi-functional nanocomposites, ternary hybrid of monodisperse Ni3S4 nanorods/graphitic C3N4 nanosheets/nitrogen-doped graphene is controllably constructed for the first time, which illustrates great potential for overall water splitting and fabrication of sodium-ion battery. Intensive investigations revealed that the ternary hybrid with robust and intertwined nanostructures possesses shorter diffusion pathways, smaller diffusion resistance and faster transfer speed of electrons and ions in addition to avoiding agglomeration, obscission, anisotropic volume expansion and irreversible mechanical failure in electrochemical reactions due to the active material of Ni3S4 nanorods wrapped by graphitic C3N4 nanosheets over conducting substrate of nitrogen-doped graphene, expediting the transport of electrolyte to flood and interact with the reaction sites, dynamically and thermodynamically, which makes the hybrid exhibits excellent electrochemical performances with long-term stability in water splitting and cyclic durability in sodium-ion battery. Especially, there is a low onset potential at 40 mV (vs RHE, J = -1.5 mA cm^-2) for HER acidically, the applied potentials of merely 1.47 V (vs RHE) and 1.51 V for OER and overall water splitting at a 10 mA cm^-2 current density are conducted. As for sodium-ion battery, the ternary hybrid possesses as high as ∼670 mAh/g specific capacity while the current density is 100 mA/g, and also the ternary hybrid shows excellent rate capability.

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Publication details

The article was received on 27 Jul 2018, accepted on 26 Dec 2018 and first published on 27 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA07253A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Controlled Construction for Ternary Hybrid of Monodisperse Ni3S4 Nanorods/Graphitic C3N4 Nanosheets/Nitrogen-Doped Graphene in van der Waals Heterojunctions as Highly Efficient Electrocatalysis for Overall Water Splitting and Promising Anode Material for Sodium-Ion Batteries

    J. Yang, S. Xing, J. Zhou, Y. Cheng, L. Shi and Q. Yang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07253A

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