Rationally Armoring PtCu Alloy with Metal‐Organic Frameworks as Highly Selective Nonenzyme Electrochemical Sensor,Advanced Materials Interfaces

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Rationally Armoring PtCu Alloy with Metal‐Organic Frameworks as Highly Selective Nonenzyme Electrochemical Sensor
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-10-08 , DOI: 10.1002/admi.201801168
Luning Chen ₁ , Tao Wang ₁ , Yakun Xue ₁ , Xi Zhou ₂ , Jinhong Zhou ₁ , Xiqing Cheng ₁ , Zhaoxiong Xie ₁ , Qin Kuang ₁ , Lansun Zheng ₁

Affiliation

The nonenzymatic electrochemical sensors based on nanomaterials recently have attracted increasing attention because of the limitations of natural enzyme‐based sensors in stability and reproducibility. However, traditional nonenzymatic electrochemical sensors suffer from poor selectivity and antiinterference capacity in spite of high activity and stability. Herein, a kind of well‐designed nonenzymatic electrochemical sensor with a PtCu@metal organic frameworks (MOFs)/C configuration is successfully constructed. In this sensor configuration, PtCu alloy nanoparticles as H₂O₂‐active centers, which are preloaded on an electroconductive support, are armored with a Cu‐based MOF shell via a self‐sacrificial template route to form a semisurrounding structure. Thanks to the synergy between the MOF shells and the well‐consolidated PtCu/electroconductive support interface, this nonenzymatic sensor not only exhibits superior selectivity and antiinterference capacity toward the detection of H₂O₂, but also illustrates its great potential in real biological systems (e.g., living tumor cells). The present work greatly deepens the understanding of the role of MOF shells in improving the sensing performance of nonenzymatic electrochemical sensors based on MOF composites. More importantly, these findings provide new design views for the rational construction of high‐performance MOF‐based composites.

中文翻译：

具有金属有机骨架的PtCu合金作为高选择性非酶电化学传感器的合理铠装

由于基于天然酶的传感器在稳定性和可重复性方面的局限性，基于纳米材料的非酶电化学传感器最近引起了越来越多的关注。然而，传统的非酶电化学传感器尽管具有高活性和稳定性，但仍具有较差的选择性和抗干扰能力。本文成功构建了一种精心设计的，具有PtCu @金属有机骨架（MOF）/ C构型的非酶电化学传感器。在此传感器配置中，PtCu合金纳米粒子为H ₂ O ₂预先放置在导电支架上的主动中心通过自牺牲模板路径用基于铜的MOF外壳进行装甲，以形成半环绕结构。由于MOF外壳和牢固整合的PtCu /导电支撑界面之间的协同作用，这种非酶传感器不仅对H ₂ O ₂的检测具有优异的选择性和抗干扰能力，但也说明了其在实际生物系统（例如活体肿瘤细胞）中的巨大潜力。本工作极大地加深了对MOF壳在提高基于MOF复合材料的非酶电化学传感器的传感性能中作用的认识。更重要的是，这些发现为合理构造高性能基于MOF的复合材料提供了新的设计观点。

更新日期：2018-10-08

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