纳米FePt/GC催化剂的制备及其对乙醇的电氧化性能  

Preparation of FePt/GC nanocatalysts and their electrocatalytic activities for ethanol oxidation

作　　者：王洁莹[1] 陈声培[1] 王鹏[1] 黄蕊[1] 李明轩[1] 孙世刚[1] 

机构地区：[1]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

出　　处：《化工学报》2010年第S1期101-105,共5页CIESC Journal

基　　金：国家自然科学基金项目(20873113;20921120405);浙江省重中之重学科开放基金项目(20090503)~~

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,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催化剂的起始氧化电位(Ei)提前了0.044V;其对乙醇氧化的峰电流密度(jp)大约是纳米Pt/GC催化剂的2.16倍。Iron nanoparticles were uniformly deposited 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 electrocatalytical properties for ethanol oxidation of the nano-Pt/GC,nano-FePt/GC were studied by cyclic voltammetry(CV).The nano-FePt/GC electrode shows high electrocatalytical activity.The catalytic activity is in the order of:nano-Pt/GC<nano-FePt/GC.The onset potential(Ei)of ethanol oxidation on nano-FePt/GC electrode is negatively shifted 0.044 V,and the steady oxidation current density(jp)is enhanced about 2.16 times,compared with nano-Pt/GC electrode.

关 键 词：PT 纳米FePt/GC 乙醇氧化 

分 类 号：O643.32[理学—物理化学]