Hofmann-Type Coordination Polymer-Derived Nickel Phosphide Nanoplates for Electrocatalytic Oxidation and Determination of Insulin

IF 2.7 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2024-08-24 DOI:10.1007/s12678-024-00888-5

Mahmoud Roushani, Hadi Hosseini, Kowsar Maleki, Farzaneh Mohammadi

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Abstract

It is of key importance to design efficient insulin electrocatalysts based on nonprecious noble metal-free. However, the design of advanced nanostructured based metal phosphides is scarcely reported. In this work, for the first time, a novel insulin sensor based on Ni₂P electrode materials with nanoplate structure was designed. In this regard, Hofmann-type coordination polymers (HCPs) based on Ni(H₂O)₂[Ni(CN)₄]·H₂O (Ni–Ni HCP) were prepared and used as precursors to the preparation of Ni₂P. The unique layer structure of Ni–Ni HCP precursors can lead to the preparation of Ni₂P nanoplates with large surface areas, high availability of active catalytic centers, and abundant interior space for fast diffusion and boosted reaction kinetics. The electrochemical results showed that the Ni₂P nanoplates offer excellent capability toward insulin oxidation in 0.1 M NaOH electrolyte solution. Moreover, a proper linear relationship was obtained between insulin concentrations and the current responses in the range of 10 to 100 pM with the detection limit of 3 pM and with good capability for the determination of insulin in the human blood serum sample. This work offers a rational method for the structure engineering of Ni₂P nanoplates using HCP precursors, which can lead to the fabrication of high-performance insulin sensor.

Graphical Abstract

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用于电催化氧化和胰岛素测定的霍夫曼型配位聚合物衍生磷化镍纳米板

设计基于非贵金属的高效胰岛素电催化剂至关重要。然而，先进的基于纳米结构的金属磷化物的设计却鲜有报道。在这项工作中，首次设计了一种基于纳米板结构 Ni2P 电极材料的新型胰岛素传感器。为此，研究人员制备了基于 Ni(H2O)2[Ni(CN)4]-H2O 的霍夫曼型配位聚合物（HCP）（Ni-Ni HCP），并将其用作制备 Ni2P 的前驱体。Ni-Ni HCP 前驱体独特的层状结构可制备出具有大表面积、高活性催化中心可用性和丰富内部空间的 Ni2P 纳米板，从而快速扩散并提高反应动力学。电化学结果表明，Ni2P 纳米板在 0.1 M NaOH 电解质溶液中具有出色的胰岛素氧化能力。此外，在 10 至 100 pM 范围内，胰岛素浓度与电流响应之间呈适当的线性关系，检测限为 3 pM，具有良好的测定人血清样品中胰岛素的能力。这项工作为利用 HCP 前驱体进行 Ni2P 纳米板结构工程提供了一种合理的方法，从而可以制备高性能的胰岛素传感器。

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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.