纳米FePtGC催化剂的制备和其对乙醇的电氧化性能研究-类似.pdf

第十二届全国有机分子电化学与工业学术会议论文集 240 纳米 FePt/GC 催化剂的制备及其对乙醇的电氧化性能研究王洁莹,陈声培,孙世刚( 厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系, 福建,厦门 361005 , Email: ******@xmu. ) 摘要: 通过循环伏安法( CV )在玻碳( GC )表面电沉积出分布较为均匀的纳米 Fe 粒子,制得纳米 Fe/GC ,再经置换反应制得具有 Fe 核 Pt 壳结构的纳米粒子(纳米 FePt/GC ) 。SEM 图像显示,纳米 Fe/GC 和纳米 FePt/GC 表面粒子的形貌均呈立方体形,且分布较为均匀。纳米 FePt/GC 对乙醇的氧化具有很高的电催化活性。相对于纳米 Pt/GC 催化剂,纳米 FePt/GC 催化剂的的起始氧化电位提前了 ;其对乙醇氧化的峰电流密度大约是 nmPt/GC 催化剂的 倍。关键词: Pt ;纳米 FePt/GC ;乙醇氧化 Preparation of FePt/GC nanocatalyst and their electrocatalytic activities for ethanol oxidation WANG Jieying , CHEN Shengpei, SUN Shigang (Department of Chemistry, College of Chemistry and Chemical Engineering, State Key Lab of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, Email: ******@xmu. ) Abstract : Iron nanoparticles were uniformly depo sited on glassy carbon electrode by electrochemical cyclic voltammetry, and the Fe core / Pt shell nanoparticles were further obtained through "galvanic replacement". SEM observation illustrated that the cuboid nanoparticles dispersing uniformly on GC surface. The electrocat alytical properties for ethanol oxidation of the nmPt/GC, nmFePt/GC were studied by cyclic voltammetry (CV). The nmFePt/GC electrode shows high electrocatalytical activity. The catal ytic activity is in the order of: nmPt/GC ﹤ nmPtFe/GC. The onset potential (E i) of ethanol oxidation on nmFePt/GC