Nd3+修饰纳米TiO2-CNTs-PtNi复合催化剂的制备及电化学性能  

The Preparation and Electrochemical Properties of Nd3+ Modified NanoTiO2-CNTs-PtNi Complex Catalysts

作　　者：冯德香[1] 黄勤安[1] 褚道葆[2] 

机构地区：[1]皖南医学院化学教研室,安徽芜湖241002 [2]安徽师范大学化学与材料科学学院,安徽芜湖241000

出　　处：《安徽师范大学学报（自然科学版）》2010年第4期367-370,共4页Journal of Anhui Normal University(Natural Science)

基　　金：2010年高校省级自然科学基金(KJ2010B240);国家自然科学基金(No.20476001)

摘　　要：采用电合成前驱体Ti（OEt）4直接水解法和电化学扫描电沉积法及物理吸附的方法制备了稀土金属离子Nd3＋修饰的NanoTiO2-CNTs-PtNi复合纳米催化剂,通过计时电流和CV研究,结果表明Nd3＋修饰的NanoTiO2-CNTs-PtNi的电极对甲醇电氧化的峰电位进一步负移约30mV,氧化峰电流增大,表明Nd3＋的加入对甲醇的电催化氧化有一定的协同催化作用,这种作用导致CO在复合催化剂上的弱吸附,从而避免了催化剂的中毒.同时提出其可能的形成机理.We prepared Nd3＋ modified nanoTiO2-CNTs-PtNi complex catalysts by the direct hydrolysis of electrosynthetic precursor Ti（OEt）4 and electrochemical scan elecreodepositing method and physical adsorption Method,Chronoamperometry response and CV results for Presence of Nd3＋ in the nanoTiO2-CNTs-PtNi composite electrode by electrochemical codeposition made peak potential of methanol oxidation a further negative shift of about 30mV and bigger peak current.The experiments results showed that Nd3＋ has a synergistic catalytic effect of nanocomposit,which leads to the weak adsorption of CO on complex nanostructure catalysts,avoiding poisoning of the catalysts.A possible synthesis mechanism was proposed.

关 键 词：甲醇的电氧化 Nd3+修饰 NanoTiO2-CNTs-PtNi复合催化剂 协同催化 

分 类 号：O643[理学—物理化学]