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微波辅助合成用于质子交换膜燃料电池的 Pt/CNT 纳米复合材料电催化剂。

Microwave-assisted synthesis of Pt/CNT nanocomposite electrocatalysts for PEM fuel cells.

机构信息

ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong, New South Wales 2522, Australia.

出版信息

Nanoscale. 2010 Feb;2(2):282-6. doi: 10.1039/b9nr00140a. Epub 2009 Oct 12.

Abstract

Microwave-assisted heating of functionalized, single-wall carbon nanotubes (FCNTs) in ethylene glycol solution containing H(2)PtCl(6), led to the reductive deposition of Pt nanoparticles (2.5-4 nm) over the FCNTs, yielding an active catalyst for proton-exchange membrane fuel cells (PEMFCs). In single-cell testing, the Pt/FCNT composites displayed a catalytic performance that was superior to Pt nanoparticles supported by raw (unfunctionalized) CNTs (RCNTs) or by carbon black (C), prepared under identical conditions. The supporting single-wall carbon nanotubes (SWNTs), functionalized with carboxyl groups, were studied by thermogravimetric analysis (TGA), cyclic voltammetry (CV), and Raman spectroscopy. The loading level, morphology, and crystallinity of the Pt/SWNT catalysts were determined using TGA, SEM, and XRD. The electrochemically active catalytic surface area of the Pt/FCNT catalysts was 72.9 m(2)/g-Pt.

摘要

微波辅助加热功能化的单壁碳纳米管(FCNTs)在乙二醇溶液中含有 H(2)PtCl(6),导致 Pt 纳米粒子(2.5-4nm)在 FCNTs 上的还原沉积,得到质子交换膜燃料电池(PEMFCs)的活性催化剂。在单电池测试中,Pt/FCNT 复合材料表现出优于在相同条件下制备的由原始(未功能化)碳纳米管(RCNTs)或碳黑(C)支撑的 Pt 纳米粒子的催化性能。用热重分析(TGA)、循环伏安法(CV)和拉曼光谱研究了用羧基功能化的支撑单壁碳纳米管(SWNTs)。使用 TGA、SEM 和 XRD 确定了 Pt/SWNT 催化剂的负载水平、形态和结晶度。Pt/FCNT 催化剂的电化学活性催化表面积为 72.9m(2)/g-Pt。

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