Synthesis of nanostructured M/Fe₃O₄ (M = Ag, Cu) composites using hexamethylentetramine and their electrocatalytic properties

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• 作者：Lu Pan^a ; ^b ; ^{panlu1970@163.com} ; Yonghong Chen^a ; ^b ; Fengwu Wang^a
• 关键词：Ag/Fe3O4 ; Cu/Fe3O4 ; Nanostructres ; Electrochemical properties
• 刊名：Materials Chemistry and Physics
• 出版年：2012
• 期刊代码：58_02540584
• 类别：ms
• 出版时间：15 May, 2012
• 卷：134
• 期：1
• 页码：177-182
• 文件大小：1263 K

摘要

Nanoscaled Ag/Fe₃O₄ hybrids with different Ag contents and Cu/Fe₃O₄ nanoshpere and microsphere were successfully synthesized with assistance of sodium citrate and (CH₂)₆N₄ via a hydrothermal process. The as-prepared samples were identified and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), and X-ray photoelectron spectroscopy (XPS), respectively. All samples were used as electrocatalysts modified on a glassy carbon electrode for p-nitrophenol reduction in a basic solution. The catalytic activity of Ag/Fe₃O₄ samples increased first and then decreased by increasing Ag content from 0%to 8%, and the one with 6%Ag displayed the highest catalytic activity. All the Cu/Fe₃O₄ samples exhibited enhanced catalytic activity by comparison with a glassy carbon electrode, and the one prepared with the molar ratio of Cu²⁺, Fe³⁺, citrate anion, and (CH₂)₆N₄ with 1:1:3:5 exhibited the highest catalytic activity.