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Fabrication of indium tin oxides (ITO)-supported poly(3,4-ethylenedioxythiophene) electrodes coated with active IrO2 layer for morphine electrooxidation

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Abstract

Novel indium tin oxides (ITO)/PEDOT/IrO2 composite electrodes were fabricated by dipping IrO2 colloids onto poly(3,4-ethylenedioxythiophene) (PEDOT)-coated ITO substrate for morphine electrooxidation. Scanning electron microscopy (SEM) image showed that the active IrO2 layer was dispersed more uniformly at PEDOT intermediate layer than at bare ITO substrate. Voltammetric measurements indicated that the as-prepared IrO2 colloids are very active for both the oxygen evolution reactions (OER) and for reversible valance transition between lower and higher oxides. ITO/PEDOT/IrO2 electrodes perform enhanced electrochemical activity towards the oxidation of morphine, as compared with the un-modified ITO-based PEDOT electrodes (ITO/PEDOT) or the ITO electrodes directly coated with IrO2 (ITO/IrO2), suggesting that the composite electrode materials are one of the potential candidates for morphine detection.

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Acknowledgments

J. M. Hu thanks the NSFC (grant no. 50871101 and 20473072) and the Fundamental Research Funds for the Central Universities (No. 2009QNA3007) for financial support. C.N. Cao thanks the NSFC (grant no. J0830413) for financial support.

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Authors and Affiliations

  1. Department of Chemistry, Zhejiang University, Hangzhou, 310027, People’s Republic of China

    Ke-Zhong Tang, Liang Liu, Yu-Peng Hong, Ji-Ming Hu, Jian-Qing Zhang & Chu-Nan Cao

  2. State Key Laboratory for Corrosion and Protection, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China

    Jian-Qing Zhang

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  1. Ke-Zhong Tang
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  2. Liang Liu
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  3. Yu-Peng Hong
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  4. Ji-Ming Hu
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  5. Jian-Qing Zhang
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  6. Chu-Nan Cao
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Correspondence to Ji-Ming Hu.

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Tang, KZ., Liu, L., Hong, YP. et al. Fabrication of indium tin oxides (ITO)-supported poly(3,4-ethylenedioxythiophene) electrodes coated with active IrO2 layer for morphine electrooxidation. J Appl Electrochem 40, 1699–1704 (2010). https://doi.org/10.1007/s10800-010-0167-x

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  • DOI: https://doi.org/10.1007/s10800-010-0167-x

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