We have synthesized polyaniline/carbon black-supported Pd nanoparticle composites (Pd/PANI/C) that show comparable activity and durability for ORR compared with Pd/C in alkaline solution. The HR-TEM images show that the Pd nanoparticles were more evenly distributed on the surface of the PANI/C than those on Pd/C. The activity of Pd/PANI/C catalyst for ORR depends on the ratio of PANI/C and the best activity occurs at ratio of 1:2, followed by 1:1 and 1:3. The four-electron reduction is more favorable on PPC2 (1:2) than other catalysts. The high performance of the Pd/PANI/C is attributed to the synergistic effect between PANI and carbon. And the results indicated incorporation of certain amounts of PANI into the Pd/C catalyst can prevent Pd nanoparticle agglomerations and maintain properties of the catalyst for ORR in alkaline medium.

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我们已经合成了聚苯胺/炭黑负载的Pd纳米颗粒复合材料（Pd / PANI / C），与碱性溶液中的Pd / C相比，其ORR的活性和耐用性相当。HR-TEM图像显示，Pd纳米粒子比Pd / C粒子更均匀地分布在PANI / C的表面上。Pd / PANI / C催化剂对ORR的活性取决于PANI / C的比例，最佳活性的比例为1：2，然后是1：1和1：3。PPC2（1：2）上的四电子还原比其他催化剂更有利。Pd / PANI / C的高性能归因于PANI和碳之间的协同作用。结果表明，在Pd / C催化剂中加入一定量的PANI可以防止Pd纳米颗粒的团聚，并在碱性介质中保持ORR催化剂的性能。

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