Highly active Mo-modified NiCoP/NiCoN flower-like sphere: Controlled phase engineering for efficient water splitting

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL FlatChem Pub Date : 2023-09-09 DOI:10.1016/j.flatc.2023.100552

Kai Chen , Sunny Yadav , Chiyeop Kim , Vandung Dao , Liyu Liu , Yong-Zhu Yan , Hoki Son , In-Hwan Lee

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Abstract

Reasonable design and preparation of a versatile catalyst for the ultra-high efficiency energy conversion system has remarkable practical significance. Herein, a facile phase engineering strategy is employed to synthesize molybdenum modified nickel cobalt nitride and nickel cobalt phosphide flower-like sphere heterostructure (labeled as Mo-NiCoP/NiCoN FS) to improve the performance of Mo-NiCoN FS. The significant geometric structure advantages, the exposure to abundant active centers and the interfacial effect of heterostructure of the target product is evaluated in detail. When the as-obtained Mo-NiCoP/NiCoN FS is applied to the electrochemical bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), it demonstrates remarkable electrocatalytic activity, high-conductivity and excellent corrosion resistance compared with Mo-NiCoN FS with a single phase. As a result, Mo-NiCoP/NiCoN FS indicates a low overpotential towards HER (204 mV at 10 mA/cm²) and OER (262 mV at 10 mA/cm²) compared with Mo-NiCoN (234 mV for HER and 357 mV for OER at 10 mA/cm²) in an alkaline medium and it exhibits excellent activity and stability during the dual-electrode full water-splitting. Therefore, the advanced nano-catalyst with superior activity developed through the controllable phase engineering method illustrates a potential application prospect in high efficiency energy equipment water-splitting and fuel-cells.

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高活性mo修饰NiCoP/NiCoN花状球体:用于高效水分解的控制相工程

合理设计和制备一种适用于超高效能量转换系统的通用催化剂具有显著的现实意义。本文采用易相工程策略合成钼改性的氮化镍钴和磷化镍钴花状球体异质结构(标记为Mo-NiCoP/NiCoN FS)，以提高Mo-NiCoN FS的性能。详细评价了目标产物显著的几何结构优势、丰富的活性中心暴露和异质结构的界面效应。将所得的Mo-NiCoP/NiCoN FS应用于电化学双功能析氢反应(HER)和析氧反应(OER)中，与单相Mo-NiCoN FS相比，表现出显著的电催化活性、高导电性和优异的耐腐蚀性。结果表明，在碱性介质中，Mo-NiCoP/NiCoN FS对HER (10 mA/cm2时为204 mV)和OER (10 mA/cm2时为262 mV)的过电位较Mo-NiCoN (HER为234 mV, OER为10 mA/cm2时为357 mV)低，在双电极完全水分解过程中表现出优异的活性和稳定性。因此，通过可控相工程方法开发的具有优异活性的高级纳米催化剂在高效能源设备、水分解和燃料电池中具有潜在的应用前景。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)