低维纳米尺度金属（Cu、Ni）的腐蚀行为及电化学特征研究

项目名称： 低维纳米尺度金属（Cu、Ni）的腐蚀行为及电化学特征研究

项目编号： No.51271031

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 吴俊升

作者单位： 北京科技大学

项目金额： 80万元

中文摘要： 针对低维金属材料尺寸纳米化所表现出来的特异腐蚀现象及电化学行为，本课题通过将聚焦离子束（FIB）纳米微加工技术、环境扫描电子显微系统（ESEM）原位观察分析技术以及微电极电化学测试技术等先进实验手段综合集成，发展建立纳米尺度金属腐蚀和电化学研究实验方法；基于高分辨电子显微分析技术，系统研究常用金属Cu、Ni的纳米颗粒、纳米线以及纳米薄层试样在NaCl水溶液体系中的腐蚀行为，并通过单体纳米金属材料电化学测试分析，研究Cu、Ni低维纳米金属的腐蚀电化学过程机制；结合热力学计算和理论分析，深入研究纳米金属微观结构和表面物理化学特性与其腐蚀行为的内在关系，探讨纳米金属表面/溶液界面吸附、扩散理论，阐释纳米金属电极过程动力学机制，初步建立Cu和Ni等低维纳米金属腐蚀及电化学理论模型，为实现该类金属纳米材料的大规模实际应用和促进腐蚀学科向微观体系创新发展奠定理论和实验基础。

中文关键词： 纳米尺度；金属；腐蚀；电化学；高分辨电子显微分析

英文摘要： An understanding of the stability and corrosion of metal particles, wires and thin films at nanometer scale in the reaction environments, compared with their bulks, is of great importance due to their increasing demands in nanoelectronic devices, heterogeneous catalysis, sensor, fuel cell, solar cell and biological medicine applications. The increased surface to volume ratio of nano-scale metals achieved by particle size reduction leads to exceptional corrosion and unusual electrochemical behaviours that differ from those of their bulk macroscopic counterparts. In this proposal, focused ion beam (FIB) micro/nano-fabrication, environmental scanning electron microscopy(ESEM) and microelectrode electrochemical measurement techniques are combined to develop experimental methods for the study of corrosion and electrochemistry of nano-scale metals. The corrosion behaviours of Cu and Ni nanoparticles and nanowires, and their nano-layer specimens in aqueous solutions are to be investigated in detail. The morphology and microstructure of corrosion products and passive films formed on the surface of nano-scale metals will then be characterized using high resolution electron microscopy. The electrochemical tests such as corrosion potential, cyclic voltammetry and potentiodynamic polarization curves of individual metal nano

英文关键词： nano-scale；metals；corrosion；electrochemistry；high resolution electron microscopy