标题：A General Dealloying Route to Synthesize Nanoporous Non-Noble Metals
作者：Zhonghua Zhang;Yingzi Wang;Yan Wang
作者机构：[Zhang, Z] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Shandong University, Ministry of Education, Jingshi Road 更多
会议名称：International Conference on Nanoscience and Technology, (ChinaNANO)
会议日期：SEP 07-09, 2011
来源：Journal of nanoscience and nanotechnology
关键词：Nanoporous Metals;Dealloying;Mg-Based Alloys
摘要：At present, most studies focus upon the synthesis of nanoporous noble metals such as Au, Ag, Pt and Pd. Here we show that the dealloying route can be generally used to fabricate nanoporous non-noble metals like Bi, Ga and Sn, and rapidly solidified Mg-based (Mg-Bi, Mg-Ga and Mg-Sn) precursors were utilized. The microstructure of the as-obtained nanoporous metals has been characterized using X-ray diffraction, scanning electron microscopy and energy dispersive X-ray analysis. These nanoporous metals show a three-dimensional bicontinuous ligament-channel structure. It has been found that the more active Mg atoms were selectively etched away during dealloying, and the residual elements (Bi, Ga and Sn) diffused and agglomerated to form the nanoporous structure.