Preparation of the Pt nanoparticles decorated poly(N-acetylaniline)/MWNTS nanocomposite and its electrocatalytic oxidation toward formaldehyde

In this work, a novel 3D nanocomposite is presented, which is consisted of poly(N-acetylaniline) (PAANI)/multi-walled carbon nanotubes (MWNTs) nanorods (in which the inner layer was comprised of MWNTs and the outer layer was PAANI, forming a core-shell structure) and the decorated Pt nanoparticles. Electrochemical techniques (such as electrochemical impedance spectroscopy (EIS)), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM) are used to characterize the nanocomposite. The resulting Pt/PAANI/MWNTs nanocomposite can be served as a higher efficient catalyst for the electrochemical oxidation of formaldehyde at 0.41 V with the catalytic current of 0.73 mA, which was accompanied with about 45 mV potential negative shifts and two-fold increase in peak current comparison to the Pt/PAANI. These results reveal that the Pt/PAANI/MWNTs nanocomposite film is quite promising in the fuel cell applications. (C) 2008 Elsevier Ltd. All rights reserved.

在这项工作中，一种新型的三维纳米复合材料被提出，它由聚（N - 乙酰苯胺）（PAANI）/多壁碳纳米管（MWNTs）纳米棒（其中内层由多壁碳纳米管组成，外层是聚（N - 乙酰苯胺），形成核 - 壳结构）以及修饰的铂纳米粒子组成。电化学技术（如电化学阻抗谱（EIS））、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、X射线衍射（XRD）和透射电子显微镜（TEM）被用于表征该纳米复合材料。所得到的Pt/PAANI/MWNTs纳米复合材料可作为一种更高效的催化剂，用于在0.41 V下对甲醛进行电化学氧化，催化电流为0.73 mA，与Pt/PAANI相比，其电位负移约45 mV，峰电流增加了两倍。这些结果表明，Pt/PAANI/MWNTs纳米复合膜在燃料电池应用中非常有前景。（C）2008爱思唯尔有限公司。保留所有权利。