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首页> 外文期刊>RSC Advances >Enhanced electrocatalytic performance of cobalt oxide nanocubes incorporating reduced graphene oxide as a modified platinum electrode for methanol oxidation
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Enhanced electrocatalytic performance of cobalt oxide nanocubes incorporating reduced graphene oxide as a modified platinum electrode for methanol oxidation

机译：结合还原氧化石墨烯作为氧化甲醇的修饰铂电极，提高了氧化钴纳米立方体的电催化性能

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摘要

Herein, we report a facile hydrothermal method for the preparation of cobalt oxide nanocubes incorporating reduced graphene oxide (rGO-Co3O4 nanocubes) for electrocatalytic oxidation of methanol. The synthesized rGO-Co3O4 nanocubes were characterized using transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and Raman techniques. The electrochemical behavior of an rGO-Co3O4 nanocube modified electrode was studied using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The electrocatalytic performances of rGO-Co3O4 nanocube-modified electrodes with different wt% of GO were investigated in relation to methanol oxidation in an alkaline medium. The rGO-Co3O4 nanocube modified electrode showed enhanced current density due to oxidation of methanol when compared to the bare Pt, rGO, and Co3O4 nanocube modified electrodes. The optimal GO content for an rGO-Co3O4 nanocube-modified electrode to achieve a high electrocatalytic oxidation of methanol was 2 wt%, and it showed an anodic peak current density of 362 mu A cm(-2).
机译：在这里，我们报告了一种简便的水热方法，用于制备结合了氧化石墨烯（rGO-Co3O4纳米立方体）的钴氧化物纳米立方体，用于甲醇的电催化氧化。使用透射电子显微镜（TEM），场发射扫描电子显微镜（FESEM），X射线衍射（XRD）和拉曼技术对合成的rGO-Co3O4纳米立方体进行了表征。使用循环伏安法（CV）和电化学阻抗谱（EIS）技术研究了rGO-Co3O4纳米立方体修饰电极的电化学行为。研究了不同重量百分比GO的rGO-Co3O4纳米立方体修饰电极的电催化性能与碱性介质中甲醇氧化的关系。与裸露的Pt，rGO和Co3O4纳米立方体修饰电极相比，rGO-Co3O4纳米立方体修饰电极由于甲醇的氧化而显示出增强的电流密度。 rGO-Co3O4纳米立方体修饰电极实现甲醇的高电催化氧化的最佳GO含量为2 wt％，并且阳极峰值电流密度为362μA cm（-2）。

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