Designing and developing cost-efficient catalysts for liquid fuel electrooxidation with excellent performances in the alkaline media are of paramount significance for the practical applications of direct fuel cells. Herein, we describe the design and fabrication of well-defined three-dimensional (3D) Pd₃Pb nanocatalysts with flower-like structure. Specifically, benefiting from the high surface active areas and modified electronic structure, the as-obtained 3D flower-like Pd₃Pb catalysts can exhibit outstanding electrocatalytic performances with the mass and specific activities of 4515.8 mA/mg and 10.0 mA/cm² toward ethylene glycol oxidation reaction (EGOR), which are 4.3 and 5.0 times higher than those of benchmark Pd/C catalysts, respectively. Moreover, the resultant 3D flower-like Pd₃Pb nanocrystals (NCs) can also maintain for 500 cycles potential CV with less catalytic degradation and morphology variation. This work not only affords a fascinating electrocatalysts for the liquid fuel oxidation but also manifests the significance of precise morphology control of catalysts for the application of fuel cells.

设计和开发具有成本效益的，在碱性介质中具有优异性能的液体燃料电氧化催化剂，对于直接燃料电池的实际应用至关重要。在这里，我们描述了具有花朵状结构的定义明确的三维（3D）Pd ₃ Pb纳米催化剂的设计和制造。具体而言，得益于高表面活性区域和修饰的电子结构，如此获得的3D花状Pd ₃ Pb催化剂可以表现出出色的电催化性能，其质量和比活度分别为4515.8 mA / mg和10.0 mA / cm ²乙二醇氧化反应（EGOR），分别比基准Pd / C催化剂高4.3和5.0倍。此外，所得的3D花状Pd ₃ Pb纳米晶体（NCs）还可以维持500个循环的潜在CV，而催化降解和形态变化较少。这项工作不仅为液体燃料的氧化提供了一种引人入胜的电催化剂，而且还表明了精确控制燃料在燃料电池中应用的催化剂形态的重要性。