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    • Facile Synthesis of PtMn@Pt Core-Shell Nanowires for Oxygen Reduction Reaction

    Shaohui Zhang,Hao Cui,Haikun Zhou,Xiyu Tan,Pengfei Tan,Jun Pan

    Journal of Physics and Chemistry of Solids（2023）SCI 3区

    Cent South Univ | Univ New South Wales | Hunan Police Acad

    Cited 4|Views10
    Abstract
    Platinum-based alloy nanowires are often employed in oxygen reduction reaction (ORR) due to their exceptional performances. However, most platinum-based alloy nanowires suffer from poor stability in strong acidic electrolytes, as well as their complex preparation methods. Herein, PtMn@Pt core-shell nanowires were successfully prepared by one-step hydrothermal with different concentrations of polyvinylpyrrolidone (PVP) and replacement reaction. The results show that the microstructure of nanowires gradually change with the increase of PVP concentration. Meanwhile, the outer layer of the PtMn nanowires contains a Pt-skin of about 1-2 nm. Moreover, the mass activity of the prepared PtMn@Pt core-shell nanowires with 50 mg PVP is 0.409 A mg(-1) (@0.9 V), which is 3.86 times higher than that of commercial Pt/C. The as-prepared nanowires display excellent stability mainly due to the existence of Pt-skin. This paper provides a relatively simple method to synthesize Platinum-based core-shell nanowires with outstanding ORR performance.
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    PVP,PtMn@Pt,Core-shell nanowires,ORR,Pt-skin
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    【要点】：本研究成功合成了PtMn@Pt核壳纳米线，有效提高了氧还原反应性能，并实现了简便的制备方法。
    

    【方法】：通过一步水热法结合不同浓度的聚乙烯吡咯烷酮（PVP）和替换反应制备核壳结构纳米线。
    

    【实验】：使用不同浓度的PVP制备了PtMn@Pt核壳纳米线，并在0.9V的电压下，质量活性达到0.409 A mg(-1)，是商业Pt/C的3.86倍，且展现出优异的稳定性。