Abstract A novel organic-inorganic hybrid nanocomposite obtained by electro-copolymerization of multi-walled carbon nanotubes and [Ni-(Protoporphyrin IX)], and then decorated with nickel metal nanoparticles (NiPPIX/CNT/NiNp) has been successfully prepared for its use in the non-enzymatic oxidation of glucose. The structural characterization and the electrochemical evaluation of the charge transport mechanisms for NiPPIX/NTC/NiNp were performed by SEM-EDX, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements. The combination of two classes of electron hopping sites, nickel nanoparticles and the nickel atom of the porphyrin, embedded in an environment of high electronic delocalization and optimal film permeability, contributed to the electronic transfer processes, in terms of heterogeneous electron transfer rate constant (k° = 1.6 × 10−4 cm s−1 for NiPPIX/CNT/NiNp vs 2.4 × 10−5 cm s−1 for NiNp). NiPPIX/CNT/NiNp glassy carbon electrode shows the best linear response for glucose determination up to 6 mmol L−1, with a 0.9953 correlation coefficient and a slope of 0.2689 mA L mmol−1 cm−2. Lastly, the association of homogeneously distributed catalytic centers is an interesting strategy for the design of nanomaterials for sensing purposes.

中文翻译：

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新型有机-无机镍杂化纳米复合材料作为电催化剂对葡萄糖氧化的协同作用评价

摘要 多壁碳纳米管与[Ni-(原卟啉IX)]经电共聚，再用镍金属纳米粒子(NiPPIX/CNT/NiNp)修饰得到的新型有机-无机杂化纳米复合材料已成功制备并供其使用。在葡萄糖的非酶促氧化中。NiPPIX/NTC/NiNp 的电荷传输机制的结构表征和电化学评估通过 SEM-EDX、循环伏安法 (CV) 和电化学阻抗谱 (EIS) 测量进行。两类电子跳跃位点、镍纳米粒子和卟啉的镍原子的组合，嵌入在高电子离域和最佳薄膜渗透性的环境中，有助于电子转移过程，就异质电子转移速率常数而言（NiPPIX/CNT/NiNp 的 k° = 1.6 × 10-4 cm s-1 对比 NiNp 的 2.4 × 10-5 cm s-1）。NiPPIX/CNT/NiNp 玻碳电极在高达 6 mmol L-1 的葡萄糖测定中显示出最佳线性响应，相关系数为 0.9953，斜率为 0.2689 mA L mmol-1 cm-2。最后，均匀分布的催化中心的结合是用于传感目的的纳米材料设计的有趣策略。