摘要
通过电合成前驱体Ti(OEt) 4直接水解法和在恒电位- 0 .0 5V (vs .SCE)电沉积法制备Pt/nanoTiO2 -CNT电极.透射电镜(TEM )和X射线衍射(XRD)分析结果表明,锐钛矿型纳米TiO2 粒子(粒径5 - 1 0nm)和碳纳米管结合形成网状结构,Pt纳米粒子(粒径8- 1 5nm)均匀地分散在纳米TiO2 /碳纳米管复合膜表面.通过循环伏安和计时电流测试表明,Pt/nanoTiO2 -CNT电极具有高活性表面,同时对甲醇的电化学氧化具有高催化活性和稳定性,Pt载量为0 .2 4mg/cm2时,常温常压下甲醇的氧化峰电流达到2 60mA/cm2 .
It is reported for the first time that the carbon nano-TiO_2-nanotubes supported Pt nanoparticles (Pt/nano TiO_2-CNT) composite catalysts were prepared by the precursor Ti(OEt)_4 directly hydrolyzed and electrodeposited at -0.05V vs. SCE .The results characterized by XRD and SEM shows that the nano TiO_2(anatase)particle size is about 5-10 nm and Pt nanoparticle (9nm) dispersed uniformly on nano TiO_2-CNT film surface. The electrocatalytic activity of Pt/nano TiO_2-CNT electrode was investigated by cyclic voltammetry and chronopotentiogram. The results indicated that Pt/nano TiO_2-CNT electrode exhibited very high electrocatalytic activity and stability for the electro-oxidation of methanol in the room temperature. When Pt loading is 0.24 mg/cm^2, the oxidation current for methanol was 260 mA/cm^2, which is higher than Pt/nano TiO_2 electrode.
出处
《安徽师范大学学报（自然科学版）》
CAS
2005年第2期192-196,共5页
Journal of Anhui Normal University(Natural Science)
基金
安徽省自然科学基金 ( 0 0 0 45 317)
安徽省高校科研基金 ( 2 0 0 3kj141)
