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Copper oxide - Graphite composite electrodes: Application to nitrite sensing

机译：氧化铜-石墨复合电极：亚硝酸盐感测中的应用

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摘要

A simple method for the modification of carbon powder with copper oxides is presented. Carbon powder is impregnated with copper(II) nitrate by stirring carbon powder in copper(II) nitrate solution for 1 hour and subsequently thermally treated at 823 K. The modified carbon powder was characterized using electrochemical and spectroscopic techniques. The existence of both copper(l) and copper(II) oxides have been established. The copper oxide modified carbon powder was used for preparation of composite electrodes, and the electrochemical and electrocatalytic behavior of the resulting composite electrodes was studied. The copper oxide modified carbon powder - epoxy composite electrodes showed a high electrocatalytic activity for the nitrite detection in aqueous media, with the detection limit comparable or lower than detection limits obtained with other electrochemical sensors.
机译：提出了一种用氧化铜改性碳粉的简单方法。通过在硝酸铜（II）溶液中搅拌碳粉1小时，将碳粉浸渍在硝酸铜（II）中，然后在823 K下进行热处理。使用电化学和光谱技术对改性碳粉进行表征。已经确定了铜（l）和铜（II）氧化物的存在。将氧化铜改性的碳粉用于制备复合电极，并研究了所得复合电极的电化学和电催化性能。氧化铜改性碳粉-环氧复合电极对水介质中亚硝酸盐的检测显示出很高的电催化活性，其检测限可与其他电化学传感器获得的检测限相当或更低。

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