Owing to reducing the amount of organic solvent and making the preparation method environmentally benign, influence of the amount of organic solvent on preparation of Pd/C catalysts series via microwave reaction was investigated. In consideration of the amount of organic solvent and catalytic activity, 5 mL of solvent volume was optimal. Meanwhile we found Pd2Co/C catalyst had the best electro-catalytic activity for oxygen reduction among a series of different Pd-Co/C catalysts, and the particle size of active component was ca. 3.5 nm.%为了减少有机溶剂的使用量，使制备方法更加环境友好，文章研究了有机溶剂量对微波反应制备Pd／C系列催化剂的影响，并采用XRD、TEM和电化学测试等方法对催化剂结构和电化学性能进行了表征和评价。研究表明：当有机溶剂使用量降到5mL时，该催化剂依然能保持较高的催化活性。在此基础上，文章还对一系列不同组成的Pd-Co／C合金催化剂进行了研究．发现活性组分粒径约为3．5nm时，Pd2Co／C催化剂具有最佳的氧还原电催化活性。
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