有机溶胶法制备PdFe／C氧还原催化剂  

Preparation of PdFe/C Catalyst for Oxygen Reduction by an Organic Colloidal Method

作　　者：王荣方[1] 刘军民[1] 廖世军[1] 

机构地区：[1]华南理工大学化学科学学院,广州510640

出　　处：《武汉理工大学学报》2006年第E02期413-416,共4页Journal of Wuhan University of Technology

基　　金：国家自然科学基金（20476034）.

摘　　要：以柠檬酸钠为络合剂，利用有机溶胶法制备了PdFe／C氧还原反应（ORR）催化剂，XRD研究结果表明催化剂具有面心立方结构，粒度小，分散性好，同时元素铁的加入使催化刑的Pd-Pd间距缩小。应用旋转圆盘电极（RDE）法评价了PdFe／C催化剂的ORR活性，测试结果表明，PdFe／C催化剂的性能优越，具有比纯钯更强的ORR催化能力。研究表明，在该催化剂表面ORR主要按照“直接四电子”反应机理进行。PdFe/C catalysts for oxygen reduction reaction （ORR） were prepared by an organic colloid method with sodium citrate as complexing agent. The XRD patterns indicated that the as-prepared catalysts had fcc structure, with small particle size and high dispersity. The Fe addition shortened the length of Pd-Pd bond. The rotating disk electrode （RDE） tests showed that the activity of the PdFe/C catalysts for ORR was higher than that of pure Pd/C catalysts and the ORR followed a 4-electron transfer process leading to the formation of water.

关 键 词：电催化剂 燃料电池 Pd-Fe合金 氧还原反应 

分 类 号：O643[理学—物理化学] O646[理学—化学]