电纺Pd纳米粒子/碳纳米纤维复合材料对甲醇的电催化氧化研究  

Electrospun Palladium Nanoparticle-Loaded Carbon Nanofiber for Methanol Electro-oxidation

作　　者：郭乔辉[1] 黄建设[1] 由天艳[1] 

机构地区：[1]中国科学院长春应用化学研究所电分析化学国家重点实验室,长春130022

出　　处：《分析化学》2013年第2期210-214,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(Nos.21155002;21105098)资助

摘　　要：利用静电纺丝技术制备了含有乙酰丙酮钯(Pd(Ac)2)前体的聚丙烯腈(PAN)纳米纤维,经H2还原和900℃碳化处理得到了Pd纳米粒子负载的碳纳米纤维复合材料(Pd/CNF)。此方法中,CNF的制备和Pd纳米粒子的形成是同步进行的,无需对碳载体进行任何预处理,实现了纳米粒子负载CNF的一步制备,简化了实验步骤的同时确保CNF载体骨架的完整性。扫描电镜(SEM)和透射电镜(TEM)分析表明,大小均一的Pd纳米粒子牢固地分散在CNF表面,其粒径约为60 nm。X-射线衍射(XRD)和X-射线光电子能谱(XPS)表征了Pd/CNF的晶体结构。Pd纳米粒子以单质态形式存在,具有面心立方体结构。通过循环伏安法(CV)和计时电流法等电化学方法研究了Pd/CNF复合材料对甲醇的电催化氧化情况,Pd/CNF对甲醇氧化显示出优异的催化活性和稳定性,优于商业化Pd/C催化剂。Pd nanoparticle-loaded carbon nanofiber composite （Pd/CNF） was prepared via electrospinning and following carbonization techniques. In this method, the synthesis of CNF and loading Pd nanoparticles were integrated into a simple one-step, and the CNF support did not suffer from any surface functionalization treatment and could keep the robust framework. The morphology and crystal structure of Pd/CNF were charac- terized by scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The results indicated that uniform Pd nanoparticles were firmly dispersed on or in CNF with face-centered cubic structure. The electrocatalytic activity of Pd/CNF toward methanol oxidation was measured by cyclic vohammetry （CV） and chronoamperometry. The electro- chemical measurements revealed that Pd/CNF exhibited higher eleetroeatalytic activity and better stability than that of commercial Pd/C.

关 键 词：静电纺丝 PD纳米粒子 碳纳米纤维 甲醇氧化 燃料电池 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TB332