碱性燃料电池氧电极的研究——制备条件对 Ag-Ni-Bi-Hg/C 催化剂活性的影响  

Study on the oxygen electrode of alkaline fuel cells——Effect of preparation condition on the catalytic activity of AgNiBiHg/C catalyst

作　　者：滕加伟[1] 金丽华 唐伦成[2] 

机构地区：[1]大连理工大学化工学院 [2]哈尔滨工程大学化工系

出　　处：《电源技术》1997年第6期252-255,共4页Chinese Journal of Power Sources

摘　　要：我们的研究表明，Ａｇ－Ｎｉ－Ｂｉ－Ｈｇ／Ｃ催化剂对碱性燃料电池中氧的阴极还原具有较高的活性。本文对上述催化剂的制备条件进行了研究。结果表明，还原剂的选择和搅拌强度对催化剂的活性有明显影响，与硼氢化钾和葡萄糖相比，甲醛是一种优良的制备银催化剂的还原剂；ＸＲＤ（Ｘ射线衍射分析）和ＳＥＭ（扫描电镜分析）证实提高搅拌强度可以使银的结晶趋于无定型化，并使银结晶粒度减小。用此化学还原法制得的催化剂其性能具有良好的重现性。A systematic research was made on the preparation condition of doped silver catalyst AgNiBiHg/C,which showed high activity for the cathodic reduction of oxygen in alkaline fuel cells.It was found that the electrocatalytic activity of the catalyst is influenced by the choice of the reducing agent and the intensity of stirring.Compared with KBH and glucose,formaldehyde is a good reducing agent for the silver catalyst preparation.XRD in conjunction with SEM indicated that the silver crystallization is prone to amorphous and the grain size of silver is reduced when the intensity of stirring was improved.The performance of the catalyst that is produced by using this method has good reproducibility.

关 键 词：碱性 燃料电池 氧电极 催化剂 制备 活性 

分 类 号：TM911.4[电气工程—电力电子与电力传动]