Electrochemical-reduced graphene oxide-modified carbon fiber as Pt–Au nanoparticle support and its high efficient electrocatalytic activity for formic acid oxidation
Electrochemical-reduced graphene oxide-modified carbon fiber as Pt–Au nanoparticle support and its high efficient electrocatalytic activity for formic acid oxidation
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DOI：
10.1007/s10008-013-2130-3
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发表时间：
2013-06
影响因子：
2.5
通讯作者：
Zhangquan Yao;Ruirui Yue;F. Jiang;Chunyang Zhai;F. Ren;Yukou Du
中科院分区：
文献类型：
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作者：
Zhangquan Yao;Ruirui Yue;F. Jiang;Chunyang Zhai;F. Ren;Yukou Du
采用简单的电化学方法制备了还原氧化石墨烯（RGO）包裹的碳纤维（CF）作为Pt-Au纳米催化剂的新型载体。采用扫描电子显微镜（SEM）、X射线能谱（EDX）、热重分析（TGA）和电化学方法对复合电极进行了表征。SEM图像显示，沉积在RGO包覆CF（RGO/CF）电极上的Pt-Au纳米粒子比沉积在裸CF电极上的Pt-Au纳米粒子具有更小的粒径和更均匀的分散。循环伏安法、线性扫描伏安法、计时电流法、计时电位法、Tafel图和电化学阻抗谱（EIS）分析表明，RGO在CF电极表面的引入有利于Pt-Au纳米粒子的分散，从而提高了Pt-Au对甲酸电氧化的电催化活性和抗中毒能力。
A simple electrochemical approach is developed to prepare reduced graphene oxide (RGO)-wrapped carbon fiber (CF) as a novel support for Pt–Au nanocatalysts. The obtained composite electrodes have been characterized by scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDX), thermal gravimetric analysis (TGA), and electrochemical methods. SEM images reveal that the Pt–Au nanoparticles deposited on RGO-wrapped CF (RGO/CF) electrode display smaller particle size and more uniform dispersion than those on the bare CF electrode. Cyclic voltammetry, linear sweep voltammetry, chronoamperometry, chronopotentiometry, Tafel plots, and electrochemical impedance spectroscopy (EIS) analyses demonstrate that the introduced RGO on CF electrode surface is beneficial to the dispersion of Pt–Au nanoparticles, as a consequence, to the enhancement of the electrocatalytic activity and the antipoisoning ability of Pt–Au towards formic acid electrooxidation.