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首页> 外文期刊>Advanced functional materials >Atomic Heterointerface Engineering of Ni_2P-NiSe_2 Nanosheets Coupled ZnP-Based Arrays for High-Efficiency Solar-Assisted Water Splitting
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Atomic Heterointerface Engineering of Ni_2P-NiSe_2 Nanosheets Coupled ZnP-Based Arrays for High-Efficiency Solar-Assisted Water Splitting

机译：Atomic Heterointerface Engineering of Ni_2P-NiSe_2 Nanosheets Coupled ZnP-Based Arrays for High-Efficiency Solar-Assisted Water Splitting

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摘要

In this study, heterogeneous nickel phosphide-nickel selenide (Ni_2P-NiSe_2)nanosheets are constructed to coat zinc phosphide-based nanorods (ZnPNRs) under a unique core@shell architecture, which acts as a highly activemultifunctional catalyst toward hydrogen evolution reaction (HER) andoxygen evolution reaction (OER). The catalyst exhibits an overpotential of79 mV at 10 mA cm~（–2） for HER and 326 mV at 100 mA cm~（–2） for OER in freshwaterunder an alkaline condition. The formation of an open 3D channelarchitecture derived from highly conductive ZnP@Ni_2P-NiSe_2 nanorodsattached nickel foam generates more exposed active sites and promotes fastmass transport. In addition, density functional theory study reveals a synergisticeffect between Ni_2P and NiSe_2 phase to reduce adsorption free energyand increase the electronic conductivity, thereby accelerating the catalyticreaction kinetics. An electrolyzer of the ZnP@Ni_2P-NiSe_(2(+,-)) requires onlycell voltages of 1.54 V (1.43 V) and 1.51 V (1.44 V) to deliver 10 mA cm~（–2） infreshwater and mimic seawater at 25 ℃ (75 ℃), respectively, along withprospective long-term stability. Furthermore, the solar energy-assisted watersplitting process demonstrates a solar-to-hydrogen efficiency of 19.75%,implying that the catalyst is an effective and low-cost candidate for watersplitting.

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