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电弧法制备的Cr纳米粉与Ni共沉积行为的电化学研究

, PP. 111-115

Keywords: Cr纳米粉,电化学研究,共电沉积,电弧法

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Abstract:

采用电弧法分别在高低两种H2分压下制备了Cr纳米粉(标记为CrI和CrII.在电解液中浸泡过的两种Cr纳米粉的XPS分析结果表明,CrII纳米粉表面在电解液中形成的Cr2O3膜比CrI薄.电化学分析表明,CrII纳米粉表面更易吸附Cl-,导致其更容易与Ni共电沉积,这是因为表面氧化膜较薄的CrII粉,氧化膜可被表面吸附的Cl-点蚀而穿透,导电性增强,使得Ni2+更容易在其表面上还原,快速将CrII嵌入共电沉积层中.

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