Pd/MWCNTs纳米复合材料的制备及其电催化性能研究

Facile synthesis of Pd/MWCNTs composite catalyst and its electrochemical performance

采用简便的原位合成法,将立方晶形Pd纳米粒子高效负载在多壁碳纳米管(MWCNTs)表面,制备了Pd/MWCNTs纳米复合材料。通过改变Pd(acac)2和MWCNTs的投料比,调控负载于MWCNTs表面的Pd纳米粒子的粒径及密度。运用扫描电子显微镜(SEM)、热重分析仪(TG/DTA)、X射线粉末衍射仪(XRD)等技术手段对Pd/MWCNTs纳米复合材料进行详细表征。电化学实验结果表明,Pd/MWCNTs纳米复合材料对甲醇和过氧化氢展现出良好的电催化性能。

The Pd / MWCNTs nanocomposite catalyst was prepared by in situ assembly of cubic Pd nanoparticles into the surface of the multiwalled carbon nanotubes（ MWCNTs） using a facile heating method. The morphology and coverage density of Pd nanoparticles on the MWCNTs surface could be tuned by changing the initial mass ratio of Pd（ acac）2to MWCNTs. The particle size,morphology,structure and composition of Pd / MWCNTs nanocomposite catalyst were detailed studied by scanning electron microscopy,X-ray diffraction and Thermogravimetric analyzer. Electrochemical experiments demonstrated that the synthesized Pd / MWCNTs nanocomposites have superior electrocatalytic performance toward the oxidation of methanol and hydrogen peroxide.