Synthesis of multiwall carbon nanotubes with a high loading of Pt by a microwave-assisted impregnation method for use in the oxygen reduction reaction
Synthesis of multiwall carbon nanotubes with a high loading of Pt by a microwave-assisted impregnation method for use in the oxygen reduction reaction
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DOI：
10.1016/j.electacta.2013.07.028
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发表时间：
2013-10
影响因子：
6.6
通讯作者：
M. Rahsepar;M. Pakshir;Hasuck Kim;Hasuck Kim
中科院分区：
文献类型：
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作者：
M. Rahsepar;M. Pakshir;Hasuck Kim;Hasuck Kim
具有高负载量（40重量%）的多壁碳纳米管（MWCNT）催化剂，采用微波辅助改进浸渍法合成了铂。采用透射电子显微镜、X射线衍射和X射线光电子能谱对催化剂进行了表征。物理化学表征结果表明，催化剂均匀地负载在多壁碳纳米管的外表面上，具有相对较窄的粒径分布（平均为3.9 nm）。通过旋转圆盘电极在不同转速下的线性扫描伏安法研究了该催化剂对氧还原的电催化性能。结果表明，所制备的催化剂对氧还原生成水分子具有良好的电催化活性。
A multiwall carbon nanotube (MWCNT) catalyst with a high loading (40 wt.%) of platinum was synthesized by a microwave-assisted improved impregnation method. The catalyst nanoparticles were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results of physicochemical characterizations reveal that the catalyst is uniformly loaded on the external surface of the MWCNTs with a relatively narrow particle size distribution (an average of 3.9 nm). The electrocatalytic performance of the catalyst toward oxygen reduction was studied by linear sweep voltammetry measurements of a catalyst-coated rotating disk electrode at different rotation rates. The results show that the prepared catalyst has good electrocatalytic activity for oxygen reduction following a four-electron path to produce water molecules.