Abstract Pt-ZnO nanotubes were synthesized by one-pot electrospinning polyacrylonitrile (PAN) and polyvinyl pyrrolidone (PVP) bipolymer in the presence of zinc acetate and chloroplatinic acid, followed by the calcination of nanofibers. The tubular structure of Pt-ZnO composite and the homogeneous distribution of Pt nanoparticles were confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). X-ray diffraction (XRD) characterization demonstrates that ZnO exhibits the hexagonal wurtzite structure, while Pt particles exist mainly in the form of cubic Pt. Zero valence Pt is confirmed by X-ray photo spectroscopy (XPS). Pt-ZnO drop-coated glassy carbon electrode (Pt-ZnO/GCE) was employed for the measurement of H2O2. The Pt/Zn molar ratio affects the catalytic activity to H2O2 reduction. Pt-ZnO/GCE with the Pt/Zn ratio of 1:3 displayed the best catalytic performance, and a corresponding linear relationship was obtained with H2O2 concentrations ranging from 2 × 10−5 M to 5 × 10−3 M (R2 = 0.9969). The limit of detection is 1.5 × 10−6 M (S/N ≥ 3). The electrospun-based Pt-ZnO nanotubes have a great potential for electrochemical sensing.

中文翻译：

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用于检测 H 2 O 2 的 Pt-ZnO 复合纳米管修饰电极的制备

摘要 在醋酸锌和氯铂酸的存在下，通过一锅法静电纺丝聚丙烯腈 (PAN) 和聚乙烯吡咯烷酮 (PVP) 双聚物，然后煅烧纳米纤维，合成了 Pt-ZnO 纳米管。通过扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 证实了 Pt-ZnO 复合材料的管状结构和 Pt 纳米颗粒的均匀分布。X 射线衍射 (XRD) 表征表明 ZnO 呈现六方纤锌矿结构，而 Pt 颗粒主要以立方 Pt 的形式存在。零价 Pt 由 X 射线照片光谱 (XPS) 确认。Pt-ZnO 滴涂玻碳电极 (Pt-ZnO/GCE) 用于测量 H2O2。Pt/Zn 摩尔比影响对 H2O2 还原的催化活性。Pt/Zn 比为 1:3 的 Pt-ZnO/GCE 表现出最好的催化性能，并且在 H2O2 浓度范围为 2 × 10−5 M 到 5 × 10−3 M 时获得了相应的线性关系（R2 = 0.9969 ）。检测限为 1.5 × 10−6 M (S/N ≥ 3)。基于电纺的 Pt-ZnO 纳米管具有巨大的电化学传感潜力。