摘要
应用循环伏安法制备了nano-Pt/GC修饰电极,优化了铂微粒在电极表面的沉积条件,并用扫描电子显微镜(SEM)和在硫酸中的循环伏安曲线对其进行了表征。结果表明铂微粒较为均匀地分散在玻碳电极表面,粒径约为140nm,电极具有很大的比表面积。循环伏安实验结果表明nano-Pt/GC电极对甲醇电氧化的催化活性明显高于铂片电极,在该修饰电极上甲醇正向扫描和反向扫描时的氧化峰电位分别是0.67V和0.49V,峰电流为61.00mA/cm2和50.50mA/cm2,分别是铂片电极上的3.13倍和3.10倍,有效地提高了金属铂的利用率,铂微粒在电极表面的最佳沉积条件是循环次数为100次和沉积速度为5mV/s。
The nano-Pt/GC electrode was prepared with the circlic vohammetry. The deposited conditions of platinum panicle on GC electrode were optimized. The nano-Pt/GC electrode was characterized by SEM and cyclic vohammogram curves in H2SO4 solution. The results were that the platinum particle evenly dispersed on GC electrode surface and the particle size was approximately 140nm. A very big relative surface of electrode was obtained. The experiment indicated that catalyzed performance of nano-Pt/GC for the methanol＇s electrooxidation is better than platinum foil. The use ratio of platinum was effective improved. The oxidized peak potential of methanol for the scaning and the reverse scaning on the nano-Pt/GC decorated electrode was 0.67V and 0.49V,the peak current were 61.00mA/cm^2 and 50.50 mA/cm^2,respectively,they were 3.13 times and 3.10 times those on pure Pt electrode. The best deposited conditions were that the cyclic times were 100 and the deposition rate was 5mV/s.
出处
《安徽化工》
CAS
2006年第5期13-16,共4页
Anhui Chemical Industry
基金
安徽省教育厅高校青年基金(2005jq1089)
安徽科技学院引进人才专项基金(ZRC200438)
安徽科技学院重点学科建设基金(YZD2004021)资助项目
