Mo-doped NiCoP nanoplates with amorphous/crystalline heterostructure for efficient alkaline overall water splitting

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2024-04-18 DOI:10.1016/j.flatc.2024.100660

Xiuwen Wang , Miao Yu , Chunmei Lv , Liyan Wang , Wei Kan , Guang Xu , Li Sun , Bing Zhao

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Abstract

Developing highly active, low-cost, and robust transition metal-based phosphide for alkaline overall water splitting is of utmost important to promote the practical application from fundamental. Herein, two-dimensional (2D) Mo-doped NiCoP nanoplates with novel amorphous/crystalline heterostructure (Mo(0.05)-NiCoP) in situ grown on three-dimensional nickel foam (NF) has been successfully constructed through hydrothermal reaction followed by the phosphorization treatment. Benefited from the synergy of amorphous/crystalline heterointerface, Mo doping, and unique 2D structure, the optimized Mo(0.05)-NiCoP exhibits outstanding electrocatalytic activity for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), achieving low overpotential of 67 mV at 10 mA cm⁻² for HER and 233 mV at 10 mA cm⁻² for OER. Meanwhile, there are only a cell voltage of 1.569 V was required to drive 10 mA cm⁻² when Mo(0.05)-NiCoP used as both anode and cathode for overall water splitting. Thus, this study provides a novel approach to construct efficient 2D bifunctional catalysts with amorphous/crystalline heterostructure and heterogeneous metal doping.

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具有非晶/晶体异质结构的掺钼镍钴磷纳米板用于高效碱性整体水分离

开发用于碱性整体水分离的高活性、低成本和坚固的过渡金属基磷化物对于从根本上促进实际应用至关重要。在此，通过水热反应和磷化处理，成功地在三维泡沫镍（NF）上原位生长出了具有新型非晶/晶体异质结构（Mo(0.05)-NiCoP）的二维（2D）掺杂钼的镍钴磷纳米板。得益于非晶/晶体异质界面、钼掺杂和独特的二维结构的协同作用，优化后的 Mo(0.05)-NiCoP 在氢进化反应（HER）和氧进化反应（OER）中表现出卓越的电催化活性，在 10 mA cm-2 氢进化反应条件下实现了 67 mV 的低过电位，在 10 mA cm-2 氧进化反应条件下实现了 233 mV 的低过电位。同时，当 Mo(0.05)-NiCoP 同时作为阳极和阴极用于整体水分离时，只需 1.569 V 的电池电压即可驱动 10 mA cm-2。因此，本研究为构建具有非晶/晶体异质结构和异质金属掺杂的高效二维双功能催化剂提供了一种新方法。

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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)

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