Pt掺杂W-Ru-Se纳米簇合物电催化氧还原性能  

Electrochemical O_2 Reduction Performance of W-Ru-Se Nano-clusters Doped with Pt

作　　者：段东红[1] 刘世斌[1] 牛秀红[1] 张忠林[1] 郝晓刚[1] 李一兵[1] 孙彦平[1] 

机构地区：[1]太原理工大学洁净化工研究所,山西太原030024

出　　处：《稀有金属材料与工程》2011年第7期1282-1286,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助(20676088);国家高技术研究发展规划("863"计划)(2006AA05Z139)

摘　　要：以低温合成法制备了Pt掺杂的W-Ru-Se纳米簇合物,并应用旋转圆盘电极线性电位扫描法测试其对氧还原反应的电催化性能,采用XRD、EDS、XPS表征结构及表面组成。结果表明,掺杂Pt后W-Ru-Se对氧还原反应活性明显提高,尤其以掺杂5%Pt(质量分数,下同)的W-Ru-Se活性提高最为显著,在0.5molL-1H2SO4中Pt-W-Ru-Se(5%Pt)的氧还原起始电位为0.25V,峰电流密度为310mAmg-1,是W-Ru-Se峰电流密度的2.2倍,活性接近于Pt/C。电解液中存在甲醇时,Pt-W-Ru-Se(5%Pt)的活性和抗甲醇性优于Pt/C。The Mo-Ru-Se nano-clusters doped with Pt were synthesized by a low temperature method and characterized by XRD,EDS and XPS.The electro-catalytic performance to oxygen reduction was studied for the Pt-W-Ru-Se catalysts in acid electrolytes with or without methanol by a linear sweep voltammetry（LSV） method.The results show that the activity of W-Ru-Se doped with Pt on oxygen reduction is markedly increased compared with that of platinum-free W-Ru-Se under the same reaction condition.The optimum Pt loading is about 5 %.In 0.5 mol L-1 H2SO4,the initial potential of oxygen reduction of Pt-W-Ru-Se（5% Pt） is 0.25 V,the peak current density is 310 mA·mg-1,approaching 2.2 times that of W-Ru-Se and the activity is close to that of Pt/C.In addition,the activity and methanol-resistance of Pt-W-Ru-Se（5% Pt） is better than that of Pt/C in 0.5 mol L-1 H2SO4 with methanol.

关 键 词：氧还原 Pt-W-Ru-Se 掺杂 抗甲醇性 

分 类 号：TM911.4[电气工程—电力电子与电力传动]