辐射状钯纳米花的可控合成及其电催化性能的研究  

Facile synthesis of radial palladium nanoflowers and their catalytic performance

作　　者：刘苏莉[1] 唐媛媛[1] 韩敏[1] 包建春[1] 戴志晖[1] 

机构地区：[1]南京师范大学化学与材料科学学院,南京210023

出　　处：《中国科学：化学》2014年第3期327-333,共7页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(21175069;21171096);江苏高校优势学科建设工程项目

摘　　要：水体系中，以十六烷基三甲基溴化铵（CTAB）和L-精氨酸为表面活性剂，抗坏血酸还原PdCl4，制得了直径范围在50～80nm之间的辐射状钯纳米花．实验表明，CTAB和L-精氨酸对辐射状钯纳米花的形成起着协同作用．此外，还研究了辐射状钯纳米花对甲酸氧化的电催化活性．在0．5mol／LH2S04＋0．5mol／LHCOOH溶液中的循环伏安结果表明，辐射状钯纳米花修饰电极在酸性溶液中电催化氧化甲酸的峰电流密度约为101mA／mg，明显优于实心钯纳米粒子修饰的电极（峰电流密度为50mA／mg），且表现出较高的稳定性．Radial palladium nanoflowers with the diameter in the range of 50-80 nm were obtained by the reaction of PdC14^2- with ascorbic acid, using cetyltrimethylammoniumbromide （CTAB） and L-arginine as the surfactants in aqueous solution. It was found that CTAB and L-arginine had synergistic effects on the formation of the radial palladium nanoflowers. The electrocatalytic activity of the radial palladium nanoflowers electrode for the formic acid oxidation in 0.5 mol/L H2SO4 ＋ 0.5 mol/L HCOOH was also investigated. The results displayed that electrocatalytic activity and stability of the radial palladium nanoflowers catalyst were better than that of the solid Pd catalyst.

关 键 词：辐射状钯纳米花 协同作用 甲酸催化氧化 

分 类 号：O614.823[理学—无机化学] TB383.1[理学—化学]