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›› 2009, Vol. 9 ›› Issue (6): 1198-1203.

• 材料工程专栏 • 上一篇    下一篇

乙二醇稳定的Pt/C催化剂的制备与表征

吴锋 刘延红 吴川   

  1. 北京理工大学化工与环境学院 北京理工大学化工与环境学院 北京理工大学化工与环境学院
  • 收稿日期:2009-04-28 修回日期:2009-07-24 出版日期:2009-12-20 发布日期:2009-12-20
  • 通讯作者: 吴川

Preparation and Characterization of Pt/C Catalysts Stabilized by Ethylene Glycol

WU Feng LIU Yan-hong WU Chuan   

  1. School of Chemical Engineering & Environment, Beijing Institute of Technology School of Chemical Engineering & Environment, Beijing Institute of Technology School of Mechanical and Power Energy Eng.，Shanghai Jiaotong University
  • Received:2009-04-28 Revised:2009-07-24 Online:2009-12-20 Published:2009-12-20
  • Contact: WU Chuan

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摘要： 以乙二醇(EG)兼作溶剂和稳定剂，分别通过NaBH4和EG还原法制备了高度细化与分散的Pt/C催化剂，对其形貌、组成、结构和电化学活性比表面等进行了表征比较，并测试了它们对甲醇与乙醇电催化氧化的活性. 结果表明，2种催化剂中，Pt均为面心立方结构，粒径小且分布窄，在炭黑载体上分散均匀，单位质量Pt对甲醇与乙醇电催化氧化的活性相当；NaBH4还原法所制Pt/C催化剂中Pt0和Pt(220)晶面含量更高，Pt对甲醇与乙醇电催化氧化的峰电流密度分别为0.68与0.67 mA/cm2，分别是EG还原法所制Pt/C催化剂的1.2倍；2种催化剂对甲醇与乙醇电催化氧化的活性均与商品E-TEK催化剂相当.

关键词: 燃料电池, 催化剂, Pt/C, 乙二醇, NaBH4

Abstract: Pt/C catalysts with narrow size distribution and high dispersion were prepared by NaBH4 and ethylene glycol (EG) reduction methods, separately, using EG as both the solvent and stabilizing agent. Their morphology, composition, structure and electrochemically active specific surface area (ECSA) were characterized and compared. Electrocatalytic activities of the two catalysts for oxidation of methanol or ethanol were tested. The two catalysts present narrow size distribution, high dispersion, face centred cubic structure of Pt, and comparative Pt-mass based activities for electro-oxidation of methanol and ethanol. The Pt/C catalyst prepared by NaBH4 reduction method has more metallic Pt (Pt0) and more crystal face Pt (220), its Pt electrochemical surface area (Pt ECAS) based anodic peak current densities for methanol and ethanol oxidations are 0.68 and 0.67 mA/cm2, 1.2 times higher than those of the Pt/C catalyst prepared by EG reduction method, respectively. Their electrocatalytic activities for methanol and ethanol are comparable with those of commercial E-TEK catalysts.

Key words: fuel cell, catalyst, Pt/C, ethylene glycol, NaBH4

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