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• W4283762770 endingPage "166111" @default.
• W4283762770 startingPage "166111" @default.
• W4283762770 abstract "Currently, the challenges remain for developing promising water splitting electrocatalyst, and the non-noble metal-based catalytic materials are ideal alternatives. This study reported a hierarchical lantern Ni-doped Co-MOF synthesized by simple stirring at room temperature, which further generated an efficient bifunctional Ni-doped CoP@carbon-nitrogen (Co-NiP@NC) water splitting electrocatalyst using a coordination confinement phosphating approach, and the Co-NiP nanoparticles (ca. 5 nm) were successfully embedded into the NC nanosheets. This catalyst shows excellent catalytic efficiency with 140 mV overpotential for hydrogen evolution reaction (HER) at the current density of 10 mA·cm −2 in 1.0 M KOH. Meanwhile, it can be used as an ideal catalyst for catalyzing oxygen evolution reaction (OER) with the overpotential of 280 mV under the same conditions. Thus, only a voltage of 1.67 V was required to realize the overall water splitting at the current of 10 mA·cm −2 when the Co-NiP@NC catalyst could act as both electrodes. Additionally, the catalyst displays the excellent HER, OER, and over water splitting (OWS) stabilities after 24 h, and the potentials decrease are feeble 2.7%, 2.9%, and 1.7%. Overall, the coordination confinement pyrolysis generated catalyst integrates the advantages of super small nanoparticles and rich hierarchical structure, providing new storage to design efficient electrocatalysts. Coordination confinement phosphorization strategy was developed to generate an effictent bifunctional electrocatalyst Co-NiP@CN with inherited lantern shaped morphology, in which the ultrasmall Ni-CoP active units (3-5 nm) were embedded into the nanosheets. It not only realizes satisfying electrocatalytic efficiencies with overpotentials of 140 mV and 280 mV for HER and OER at the current density of 10 mA cm -2 , but also delivers excellent stability after 24h electrolytic process. Additionally, the overall water splitting could be started at the voltage of 1.67 V. The excellent performances are attributed to the ultrasmall Co-NiP NPs, the ultrathin conductive CN layer and the hierarchical lantern structures. • Coordination confinement phosphorization strategy was developed to generate bifunctional electrocatalyst Co-NiP@CN. • The ultrasmall Co-NiP embedded into nanosheets offer numerous active sites and accelerates the mass transfer. • The electrocatalyst realizes overpotentials of 140 mV and 280 mV for HER and OER at the current density of 10 mA cm −2 . • The overall water splitting could be started at the voltage of 1.67 V. • The structural characterizations and electrocatalytic mechanisms were studied by XPS, SEM, TEM, Raman et al." @default.
• W4283762770 created "2022-07-02" @default.
• W4283762770 creator A5015580829 @default.
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• W4283762770 date "2022-11-01" @default.
• W4283762770 modified "2023-10-18" @default.
• W4283762770 title "Ultrasmall Co-NiP embedded into lantern shaped composite achieved by coordination confinement phosphorization for overall water splitting" @default.
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• W4283762770 doi "https://doi.org/10.1016/j.jallcom.2022.166111" @default.
• W4283762770 hasPublicationYear "2022" @default.
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