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.
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.
出处
《电化学》
CAS
CSCD
北大核心
2007年第3期302-306,共5页
Journal of Electrochemistry
基金
国家自然科学基金(批准号:20576071)资助
关键词
载体
氧电极
负载型电催化剂
析氧反应
support
oxygen electrode
supported electrocatalyst
oxygen evolution reaction
