电势阶跃与方波电势结合处理金电极快速制备三维微/纳多孔金
首发时间:2011-03-03
摘要:光亮金电极在2 mol/ dm3 HCl溶液中电势阶跃至0.9 V处理50 s 后,转移到2 mol/ dm3 NaOH溶液中方波电势脉冲处理100 - 500 s, 可快速制备出均匀的三维微米/纳米多孔结构。所制备的三维微/纳多孔金具有较大的表面积,具有多种功能:对葡萄糖的电催化氧化表现出较高的活性,可作为表面增强拉曼散射的基底,在修饰单层硫醇后具有超疏水性。
关键词: 电势阶跃 方波电势脉冲 多孔金 电催化 表面增强拉曼散射 超疏水
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Facile fabrication of micro-nano three-dimensional porous gold films by treating the gold electrode with potential step and square wave potential pulses
Abstract:Micro-/ nano-porous structures of gold have been prepared by treating a smooth gold electrode with a step potential of 0.9 V for 50 s in a solution of 2 mol/ dm3 HCl, and then with square wave potential pulses (between 0.8 V and -5 V, 50 Hz) for 100 - 500 s in a solution of 2 mol/ dm3 NaOH. The porous gold films have been characterized by X-ray diffractometry and scanning electron microscopy. The as-prepared gold films have strong surface-enhanced Raman scattering effect (SERS), high electrocatalytic activity toward the oxidation of glucose, and superhydrophobicity after decorating a monolayer of n-dodecanethiol.
Keywords: potential step square wave potential pulses porous gold electrocatalysis SERS superhydrophobicity
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No.4411719570657129****
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