Synthesis and physical/electrochemical characterization of Pt/C nanocatalyst for polymer electrolyte fuel cells
Synthesis and physical/electrochemical characterization of Pt/C nanocatalyst for polymer electrolyte fuel cells
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DOI：
10.1016/j.jpowsour.2004.02.021
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发表时间：
2004-07-12
影响因子：
9.2
通讯作者：
Guo, JW
中科院分区：
文献类型：
--
作者：
Prabhuram, J;Zhao, TS;Guo, JW
在有机溶剂四氢呋喃(THF)中，采用简单的甲酸还原法制备了20wt.%的铂/碳纳米催化剂。透射电子显微镜和X射线衍射仪分析表明，在Vulcan XC-72碳载体上形成了尺寸约为3-4 nm的分散良好的铂纳米颗粒。利用FARM对两种不同合成方法的比较表明，THF溶剂和高比表面积的Vulcan XC-72碳载体可以促进铂纳米颗粒的形成和分散。用X射线光电子能谱(XPS)对铂/炭进行了表面表征，结果表明，60.3%的铂以金属状态存在。此外，循环伏安法(CV)的电化学表征表明，该催化剂的电化学活性表面积(EAS)和甲醇氧化反应分别比20wt.%的Pt.%的E-TEK催化剂相近和略高。(C)2004爱思唯尔B.V.保留所有权利。
In the present study, 20 wt.% Pt/C nanocatalyst has been synthesized by the simple formic acid reduction method (FARM) in the organic solvent tetrahyrofuran (THF). Transmission electron microscope (TEM) and X-ray diffraction (XRD) analyses indicate the formation of well-dispersed Pt nanoparticles having sizes of around 3-4 nm on the Vulcan XC-72 carbon support. A comparison between two different synthetic approaches by using the FARM shows that the formation and dispersion of the Pt nanoparticles can be facilitated by the THF solvent and high surface area Vulcan XC-72 carbon support. The surface characterization of the Pt/C by X-ray photoelectron spectroscopy (XPS) reveals that 60.3% of Pt is present in its metallic state. Furthermore, the electrochemical characterization by the cyclic voltammetry (CV) demonstrates that the electrochemical active surface (EAS) area and methanol oxidation reaction of the Pt/C is respectively almost similar and slightly higher than that of the 20 wt.% Pt/C E-TEK catalyst. (C) 2004 Elsevier B.V. All rights reserved.