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负载型氧电极PtRuIr/TiC催化剂的制备、结构及CV研究
引用本文:隋升,马丽荣.负载型氧电极PtRuIr/TiC催化剂的制备、结构及CV研究[J].电化学,2007,13(3):302-306.
作者姓名:隋升  马丽荣
作者单位:上海交通大学燃料电池研究所,上海,200030;东北大学材料与冶金学院,辽宁,沈阳,110004
基金项目:国家自然科学基金(批准号:20576071)资助
摘    要:以TiC纳米粉作载体,超声波分散?共还原沉积方法制备以Pt、Ru和Ir为活性组分的负载型催化剂PtRuIr/TiC.BET比表面积、扫描电子显微镜(SEM)、X光衍射(XRD)及循环伏安(CV)等测试表明:该负载型催化剂活性组分Pt、Ru、Ir微晶(组成2.6%Pt,1.3%Ru,16%Ir和80%TiC,by mass)在载体TiC上趋于无定型化结构,主要分散在载体的外表面上,其析氧性能约是相同成分无负载催化剂的3倍,经过120次CV扫描,PtRuIr/TiC在电解质溶液中几乎不溶解.实验证实,这一电极具有良好的电化学催化性能和稳定性.

关 键 词:载体  氧电极  负载型电催化剂  析氧反应
文章编号:1006-3471(2007)03-0302-05
收稿时间:2007-01-22
修稿时间:2007-03-15

Preparation, Structure, and CV Study of the Supported PtRuIr/TiC Electrocatalysts for Oxygen Electrodes
SUI Sheng,MA Li-rong.Preparation, Structure, and CV Study of the Supported PtRuIr/TiC Electrocatalysts for Oxygen Electrodes[J].Electrochemistry,2007,13(3):302-306.
Authors:SUI Sheng  MA Li-rong
Abstract:The PtRuIr/TiC electrocatalysts were prepared by method of reduction and deposition on TiC powders as supports together with ultrasonic wave dispersion.The sampls were characterized by BET surface area,scanning electron microscope,X-ray diffraction,and cyclic voltammetry techniques.The active components of Pt,Ru,and Ir particles(2.6%Pt,1.3%Ru,16%Ir,and 80%TiC,by mass) were mainly dispersed on the outer surface of the TiC supports,which structures were in favor of fine variable crystallites.It was found that the electrochemical performance of the PtRuIr/TiC electrodes was about three times as that of the unsupported electrocatalysts with the same active compositions for oxygen evolution reaction.After 120 times of CV cycles,there was almost no PtRuIr/TiC dissolving in the electrolyte solution.The experimental results confirmed that the PtRuIr/TiC electrodes had good electrocatalysis activity and electrochemical stability.
Keywords:support  oxygen electrode  supported electrocatalyst  oxygen evolution reaction
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