Hierarchically micro/nanostructured porous metallic copper: Convenient growth and superhydrophilic and catalytic performance
Hierarchically micro/nanostructured porous metallic copper: Convenient growth and superhydrophilic and catalytic performance
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分级微纳结构多孔金属铜：生长方便、超亲水和催化性能
DOI：
10.1039/c2jm35233h
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发表时间：
2012-10-28
影响因子：
--
通讯作者：
Wei, Xianjun
中科院分区：
文献类型：
--
作者：
Gao, Shuyan;Jia, Xiaoxia;Wei, Xianjun
本文报道了一种简单的一步法在室温下高产率地制备具有层次化微/纳米结构的多孔金属铜微球。关键的生长策略是分别使用苯酚和抗坏血酸作为致孔剂和还原剂来诱导多孔层状微/纳米结构的生长。用X射线衍射仪、扫描电子显微镜、透射电子显微镜和氮气吸附对样品进行了表征。研究发现，多孔铜微球的形貌和结构与苯酚的加入有很大的依赖关系。与商业铜粉和内部结构致密的铜片相比，分级微/纳米结构多孔金属铜微球具有良好的超亲水表面性能和更高的催化活性，表明了铜材料孔结构的重要性。并探讨了它们在燃料电池氧还原催化反应中的潜在应用。所有这些特点使得所制备的多孔铜微球成为一种非常有吸引力的多功能材料候选材料。
This paper reports a simple one-step growth of hierarchically micro/nanostructured porous metallic copper microspheres with high yield at room temperature. The key growth strategy is to use phenol and ascorbic acid as porogen and reducing agents, respectively, to induce the growth of the porous hierarchical micro/nanostructure. The samples are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption. It is found that the morphology and structure of the porous Cu microspheres are highly dependent on the phenol added. Compared to the commercial Cu powders and Cu sheets with dense internal structure, hierarchically micro/nanostructured porous metallic copper microspheres show excellent superhydrophilic surface property and much higher catalytic activity for the reduction of 4-nitrophenol, demonstrating the significance of the pore structure of the copper materials. Their potential applications in catalysis for oxygen reduction reaction of fuel cells are also explored. All these features make the as-prepared porous copper microspheres a highly attractive candidate for multi-functional materials.