In Situ Formation of Three-Dimensional Uniform Pt/Carbon Nanotube Nanocomposites from Ionic Liquid/Carbon Nanotube Gel Matrix with Enhanced Electrocatalytic Activity toward Methanol Oxidation
In Situ Formation of Three-Dimensional Uniform Pt/Carbon Nanotube Nanocomposites from Ionic Liquid/Carbon Nanotube Gel Matrix with Enhanced Electrocatalytic Activity toward Methanol Oxidation
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DOI：
10.1021/jp910251t
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发表时间：
2010-02
影响因子：
3.7
通讯作者：
Ping Yu;Qin Qian;Yuqing Lin;L. Mao
中科院分区：
文献类型：
--
作者：
Ping Yu;Qin Qian;Yuqing Lin;L. Mao
利用多壁碳纳米管（MWNTs）和氯铂酸（H2PtCl6）在离子液体中的良好溶解性（即，BmimPF 6）以形成均质且导电的凝胶基质。通过首先将H2PtCl 6溶解到离子液体中，然后将离子液体与MWNT研磨来制备凝胶。纳米复合材料的形成是通过将H2PtCl6前体还原到MWNTs上来完成的，两者都在凝胶基质中。扫描电子显微镜，X射线光电子能谱，和循环伏安法的结果表明，所制备的凝胶基质的良好的均匀性和导电性基本上导致在形成的三维纳米复合材料，其中Pt纳米粒子均匀地沉积到MWNTs在凝胶基质。...
We report here a new electrochemical method for in situ deposition of Pt nanoparticles onto multiwalled carbon nanotubes (MWNTs) to form a three-dimensional uniform Pt/MWNT nanocomposite with excellent electrocatalytic activity toward the oxidation of methanol, by taking advantage of the good solubility of MWNTs and chloroplatinic acid (H2PtCl6) into ionic liquids (i.e., BmimPF6) to form a homogeneous and electronic conductive gel matrix. The gel is prepared by first dissolving H2PtCl6 into ionic liquids and then grinding the ionic liquids with MWNTs. The formation of the nanocomposite is accomplished by the reduction of the H2PtCl6 precursor onto MWNTs, both in the gel matrix. Scanning electron microscopy, X-ray photoelectron spectroscopy, and cyclic voltammetry results reveal that the good homogeneity and conductivity of the prepared gel matrix substantially results in the formation of a three-dimensional nanocomposite, in which Pt nanoparticles are homogeneously deposited onto MWNTs in the gel matrix. ...