Two-dimensional (2D) ultrathin nickel–cobalt phosphate nanosheets were synthesized using a simple one-step hydrothermal method. The morphology and structure of nanomaterials synthesized under different Ni/Co ratios were investigated by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Moreover, the influence of nanomaterials’ structure on the electrochemical performance for glucose oxidation was investigated. It is found that the thinnest nickel–cobalt phosphate nanosheets synthesized with a Ni/Co ratio of 2:5 showed the best electrocatalytic activity for glucose oxidation. Also, the ultrathin nickel–cobalt phosphate nanosheet was used as an electrode material to construct a nonenzymatic electrochemical glucose sensor. The sensor showed a wide linear range (2–4470 μM) and a low detection limit (0.4 μM) with a high sensitivity of 302.99 μA·mM^–1·cm^–2. Furthermore, the application of the as-prepared sensor in detection of glucose in human serum was successfully demonstrated. These superior performances prove that ultrathin 2D nickel–cobalt phosphate nanosheets are promising materials in the field of electrochemical sensing.

中文翻译：

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葡萄糖氧化钴电催化活性增强的超薄磷酸镍钴磷酸盐二维纳米片的简便合成。

二维（2D）超薄镍钴磷酸盐纳米片是使用简单的一步水热法合成的。通过透射电子显微镜，扫描电子显微镜，X射线衍射和X射线光电子能谱研究了在不同Ni / Co比下合成的纳米材料的形貌和结构。此外，研究了纳米材料的结构对葡萄糖氧化电化学性能的影响。发现以2：5的Ni / Co比合成的最薄的镍钴磷酸盐纳米片显示出对葡萄糖氧化的最佳电催化活性。同样，超薄镍钴磷酸盐纳米片被用作电极材料来构建非酶促电化学葡萄糖传感器。^–1 ·厘米^–2。此外，已成功证明了所制备的传感器在人血清中葡萄糖检测中的应用。这些优异的性能证明，超薄的2D磷酸镍钴钴纳米片是电化学传感领域中很有前途的材料。