The widespread application of direct ethanol fuel cells is hampered due to the low activity, high cost and poor operation durability of electrocatalysts for ethanol oxidation reaction (EOR). Herein, we report a one-pot synthetic method to synthesize PdPb 3 nanochains with well-defined shape, size and composition via a solution-phase reduction method. The morphology, composition distribution and structure characteristics of PdPb 3 nanochains were investigated by transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Thanks to the unique structure, the as-obtained PdPb 3 nanochains can manifest much higher mass activity (2523 mA·mg −1 ) and higher operation durability than commercial Pd/C (1272 mA·mg −1 ) during the EOR measurements. More importantly, further CO-stripping measurements indicate that the incorporation of Pb species could favor the oxidative removal of CO intermediates on the Pd electrode at the negative potential and enhance the EOR activity and stability, making it possible to develop highly active and durable electrocatalysts.

中文翻译：

---

用于高性能电催化乙醇氧化的 PdPb 纳米链的简便一步合成

由于乙醇氧化反应（EOR）电催化剂活性低、成本高、运行耐久性差，直接乙醇燃料电池的广泛应用受到阻碍。在此，我们报告了一种通过溶液相还原法合成具有明确形状、尺寸和组成的 PdPb 3 纳米链的一锅合成方法。通过透射电子显微镜、X射线光电子能谱和X射线衍射研究了PdPb 3 纳米链的形貌、组成分布和结构特征。由于独特的结构，所获得的 PdPb 3 纳米链在 EOR 测量期间可以表现出比商业 Pd/C (1272 mA·mg -1 ) 更高的质量活性 (2523 mA·mg -1 ) 和更高的操作耐久性。更重要的是，