Pd as cathodic catalyst exhibits relatively low current density in mixing kinetic/diffusion controlled region. To improve catalytic activity of Pd, alloying Pd with another transition metal is an effective approach. Here, we prepared carbon-supported Pd-Ir nanoalloys (Pd-Ir/C) through impregnation method. Four types of Pd-Ir/C were designed and referred as Pd₁₉Ir/C, Pd₉Ir/C, Pd₃Ir/C, and PdIr/C using nominal Pd/Ir atomic ratios of 19:1, 9:1, 3:1, and 1:1, respectively. The results showed that Pd and Ir formed the nanoalloy structures and Pd-Ir/C exhibited significantly improved catalytic activity for oxygen reduction reaction than Pd/C, indicating that Ir had important effect on Pd-Ir nanoalloys.

Pd作为阴极催化剂在混合动力学/扩散控制区域中表现出相对较低的电流密度。为了提高Pd的催化活性，将Pd与另一种过渡金属合金化是一种有效的方法。在这里，我们通过浸渍法制备了碳载Pd-Ir纳米合金（Pd-Ir / C）。设计了四种类型的Pd-Ir / C ，并使用标称Pd / Ir原子比为19：1、9：1的Pd ₁₉ Ir / C，Pd ₉ Ir / C，Pd ₃ Ir / C和PdIr / C。 ，3：1和1：1。结果表明，Pd和Ir形成了纳米合金结构，Pd-Ir / C对氧还原反应的催化活性明显高于Pd / C，表明Ir对Pd-Ir纳米合金具有重要作用。