纳米氧化亚铜的制备及其电化学性质

研究了纳米氧化亚铜的软模板制备法,并用XRD和TEM对所制备的纳米氧化亚铜进行了表征.试验表明,利用十六烷基三甲基溴化胺为软模板制备的纳米氧化亚铜呈直径为10 nm左右,长度为250 nm左右的纳米晶须.利用Nafion将新制备的纳米氧化亚铜固定在玻碳电极表面,研究了纳米氧化亚铜的电化学性质.结果表明,纳米氧化亚铜在电极表面表现出一对对称性良好的氧化还原峰,对应于纳米氧化亚铜中心的Cu(Ⅱ)/Cu(Ⅰ)的氧化还原,峰电流随扫描速度的增大呈现线性关系,根据峰电位与扫速对数的线性关系,计算出了电子转移系数.表明纳米氧化亚铜在电极表面的反应是受表面控制的部分不可逆过程.

Preparation and Electrochemical Properties of Nano-Cuprous Oxide

Nano-cuprous oxide was prepared by using CTAB as soft template,and was characterized by XRD and TEM methods.The experimental results showed that the prepared nano-cuprous oxide by this method was a series of nanowhisker with diameter of 10 nm and length of about 250 nm.Using Nafion as glue,the newly prepared nano-cuprous oxide whisker was fixed up on the surface of glassy carbon electrode,the electrochemical properties of nano-cuprous oxide were investigated.The results indicated that the cyclic voltammgrams of nano-cuprous oxide on the surface of electrode appeared a pair of symmetrical redox peaks with peak separation of 200 mV,which were corresponded to the center Cu(Ⅱ)/Cu(Ⅰ) of nano-cuprous oxide,the peak currents were linear to the scan rate.Based on the linear relationship of peak potentials and the logarithm of scan rates,the charge transfer coefficient was calculated,indicating the electrochemical reaction of nano-cuprous oxide was a surface-controlled and partially irreversible process.