Constructing P-CoMoO4@NiCoP heterostructure nanoarrays on Ni foam as efficient bifunctional electrocatalysts for overall water splitting

IF 9.9 2区 材料科学 Q1 Engineering
Ning You , Shuai Cao , Mengqiu Huang , Xiaoming Fan , Kun Shi , Haijian Huang , Zhangxian Chen , Zeheng Yang , Weixin Zhang
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引用次数: 9

Abstract

Improving catalytic activity and durabilty through the structural and compositional development of bifunctional electrocatalysts with low cost, high activity and stability is a challenging issue in electrochemical water splitting. Herein, we report the fabrication of heterostructured P-CoMoO4@NiCoP on a Ni foam substrate through interface engineering, by adjusting its composition and architecture. Benefitting from the tailored electronic structure and exposed active sites, the heterostructured P-CoMoO4@NiCoP/NF arrays can be coordinated to boost the overall water splitting. In addition, the superhydrophilic and superaerophobic properties of P-CoMoO4@NiCoP/NF make it conducive to water dissociation and bubble separation in the electrocatalytic process. The heterostructured P-CoMoO4@NiCoP/NF exhibits excellent bifunctional electrocatalysis activity with a low overpotential of 66 ​mV at 10 ​mA ​cm−2 for HER and 252 ​mV at 100 ​mA ​cm−2 for OER. Only 1.62 ​V potential is required to deliver 20 ​mA ​cm−2 in a two-electrode electrolysis system, providing a decent overall water splitting performance. The rational construction of the heterostructure makes it possible to regulate the electronic structures and active sites of the electrocatalysts to promote their catalytic activity.

正在构建P-CoMoO4@NiCoP泡沫镍上的异质结构纳米阵列作为有效的双功能电催化剂用于整体水分解
通过开发低成本、高活性和稳定性的双功能电催化剂的结构和组成来提高催化活性和耐久性是电化学水分解中的一个具有挑战性的问题。在此,我们报道了异质结构的制造P-CoMoO4@NiCoP通过界面工程,通过调整其组成和结构,在泡沫镍基底上。得益于定制的电子结构和暴露的活性位点,异质结构P-CoMoO4@NiCoP/NF阵列可以进行协调以促进整体水分解。此外P-CoMoO4@NiCoP/NF使其有利于电催化过程中的水解离和气泡分离。异质结构P-CoMoO4@NiCoP/NF表现出优异的双功能电催化活性,具有66的低过电位​10时mV​毫安​HER和252的cm−2​100时mV​毫安​OER为cm−2。仅1.62​需要V电位才能提供20​毫安​cm−2,提供了良好的整体水分解性能。异质结构的合理构建使得调节电催化剂的电子结构和活性位点以提高其催化活性成为可能。
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来源期刊
Nano Materials Science
Nano Materials Science Engineering-Mechanics of Materials
CiteScore
20.90
自引率
3.00%
发文量
294
审稿时长
9 weeks
期刊介绍: Nano Materials Science (NMS) is an international and interdisciplinary, open access, scholarly journal. NMS publishes peer-reviewed original articles and reviews on nanoscale material science and nanometer devices, with topics encompassing preparation and processing; high-throughput characterization; material performance evaluation and application of material characteristics such as the microstructure and properties of one-dimensional, two-dimensional, and three-dimensional nanostructured and nanofunctional materials; design, preparation, and processing techniques; and performance evaluation technology and nanometer device applications.
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