论文部分内容阅读
在不同腐蚀介质中研究了化学及电化学去合金化Mn-Cu合金制备纳米多孔铜(NPC)条件及其形貌演化规律。结果表明,腐蚀介质对纳米多孔铜形成有显著影响,酸性强弱会直接改变孔径大小,在酸性更弱的有机酸中由于配合物的形成,在表面获得规则球状结构。Mn-Cu合金去合金化演化行为研究显示区域腐蚀、均一多孔演化以及多孔结构粗化构成整个去合金化过程。此外,进一步研究发现电化学电位同样对纳米多孔形貌影响显著,-0.2 V及0V可选择性腐蚀掉Mn原子,形成均一多孔结构,而0.2 V下Mn、Cu原子的共同溶解导致非多孔形貌的产生。
The conditions for the preparation of nano-porous copper (NPC) and the morphology evolution of the chemically and electrochemically de-alloying Mn-Cu alloy were studied in different corrosive media. The results show that the corrosive medium has a significant effect on the formation of nanoporous copper. The strength of acid directly changes the size of the pores, and the regular spherical structure is obtained on the surface due to the formation of complexes in the more acidic organic acids. Studies on the evolutionary behavior of Mn-Cu alloying show that the regional corrosion, uniform porous evolution and the coarsening of porous structure constitute the whole de-alloying process. In addition, further studies showed that electrochemical potential also had a significant effect on nanoporous morphology. At -0.2 V and 0 V, Mn atoms were selectively etched away to form a uniform porous structure, whereas co-dissolution of Mn and Cu atoms at 0.2 V led to non-porous Appearance