期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 91, 期 -, 页码 36-40出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2018.05.002
关键词
Screen-printed carbon electrodes; Hydrogen peroxide; Electrochemical activation; Sensors
资金
- Spanish Ministry of Economy and Competitiveness (MINECO) (FEDER funds, EU) [BFU2016-75609-P, CTQ2016-76231-C2-2-R]
- ESF funds, EU
An easy effective method for the activation of commercial screen-printed carbon electrodes (SPCEs) using H2O2 is presented to enhance sensing performances of carbon ink. Electrochemical activation consists of 25 repetitive voltammetric cycles at 10 mV s(-1) using 10 mM H2O2 in phosphate buffer (pH 7). This treatment allowed us to reach a sensitivity of 0.24 +/- 0.01 mu A mu M-1 cm(-2) for the electroanalysis of H2O2, which is 140-fold higher than that of untreated SPCEs and 6-fold more than screen-printed platinum electrodes (SPPtEs). Electrode surface properties were characterized by SEM, EIS and XPS. The results revealed atomic level changes at the electrode surface, with the introduction of new carbon-oxygen groups being responsible for improved electro-transfer properties and sensitivity. Our method was compared with other previously described ones. The methodology is promising for the activation of commercial carbon inks-based electrodes for sensor applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据