Electro-reduction of cuprous chloride powder to copper nanoparticles in an ionic liquid

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• 作者：Linpo Yu ; Huijiao Sun ; Juan He ; Dihua Wang ; Xianbo Jin ; Xiaohong Hu ; George Z. Chen
• 关键词：Ionic liquid ; Electro-reduction ; Copper nanoparticles ; Cavity microelectrode
• 刊名：Electrochemistry Communications
• 出版年：2007
• 出版时间：June 2007
• 年：2007
• 卷：9
• 期：6
• 页码：1374-1381
• 全文大小：1151 K

文摘

Cyclic voltammetry of the CuCl powder in a cavity microelectrode revealed direct electro-reduction in solid state in 1-butyl-3-methylimidazolium hexafluorophosphate. Potentiostatic electrolysis of the salt powder (attached to a current collector) in the ionic liquid produced Cu nanoparticles as confirmed by X-ray diffraction, energy dispersive X-ray analysis, scanning and transmission electron microscopy. The particle size decreased down to 10 nm when the electrode potential was shifted from −0.9 V to −1.8 V (versus Ag/Ag⁺). The electro-reduction and the nanoparticle formation mechanisms were investigated in the ionic liquid and also in aqueous 0.1 mol L⁻¹ KClO₄ in which larger Cu particles were obtained.