Synthesis and Electrocatalytic Properties of Co3O4 Nanocrystallites with Various Morphologies
Synthesis and Electrocatalytic Properties of Co3O4 Nanocrystallites with Various Morphologies
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DOI：
10.1007/s10876-010-0285-y
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发表时间：
2010-03
影响因子：
2.8
通讯作者：
Lu Pan;M. Xu;Zude Zhang
中科院分区：
文献类型：
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作者：
Lu Pan;M. Xu;Zude Zhang
采用沉淀法或水热法合成了Co 3 O 4前驱体，通过煅烧，成功地制备了颗粒状、板状、管状、棒状和片状的Co 3 O 4微晶。采用场发射扫描电子显微镜（FE-SEM）对前驱体和Co 3 O 4纳米管的形貌进行了表征。采用X射线粉末衍射（XRD）、透射电镜（TEM）、热重分析（TGA）和比表面积（BET）等手段对Co 3 O 4进行了表征。在碱性溶液中，采用循环伏安法（CV）研究了修饰在玻碳电极上的Co 3 O 4对对硝基苯酚的电催化还原活性。结果表明，在相同条件下，Co 3 O 4/GCE电极上对硝基苯酚的还原电位基本恒定，但电流密度较大。Co 3 O 4在碱性溶液中的高催化活性表明其在环境治理和有机合成中具有广泛的应用前景。
Co3O4crystallites with particle, plate-, tube-, rod- and sheet-like morphologies were successfully prepared by the calcination of the corresponding precursors synthesized via a precipitation or hydrothermal procedure. The morphologies of the precursors and Co3O4nano-tubes were detected by field emission scanning electron microscopy (FE-SEM). The as-obtained Co3O4samples were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and special surface area measurement (BET). The electrocatalytic activity ofp-nitrophenol reduction with the Co3O4products decorated on a glassy carbon electrode (GCE) was tested, respectively, using cyclic voltammetry (CV) in a basic solution. The results indicated thatp-nitrophenol was reduced with higher current density but almost at a constant potential on the Co3O4/GCE in contrast with that on a bare GCE at the same conditions. The highly catalytic activity of the as-prepared Co3O4in a basic solution suggested their wide applications in environmental treatment or organic synthesis.