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电化学  2014 

离子液体中Au(111)和Pt(111)表面Ge欠电位沉积的现场STM研究

DOI: 10.13208/j.electrochem.130605, PP. 12-16

Keywords: Ge,Au(111),Pt(111),欠电位沉积,扫描隧道显微镜,离子液体

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Abstract:

本文研究BMIPF6离子液体中Au(111)和Pt(111)表面Ge的电沉积行为.循环伏安法测试结果表明,在含0.1mol·L-1GeCl4的BMIPF6溶液Au(111)和Pt(111)表面均有两个与Ge沉积过程相关的还原峰.第一个还原峰包含了Ge4+还原成Ge2+及Ge的欠电位沉积,第二个还原峰对应Ge的本体沉积.现场扫描隧道显微镜研究结果表明,Ge在Au(111)和Pt(111)表面均有两层欠电位沉积.第一层欠电位沉积厚度约为0.25nm、形貌平整、带有缝隙的亚单层结构.第二层欠电位沉积形貌相对粗糙的点状团簇结构.该欠电位沉积过程伴随表面合金化.

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