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Copolymers Based on Indole-6-Carboxylic Acid and 3,4-Ethylenedioxythiophene as Platinum Catalyst Support for Methanol Oxidation

Department of Chemical Engineering and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan
Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 80778, Taiwan
Institute of Materials Science and Engineering, National Central University, Taoyuan 32001, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Minhua Shao
Catalysts 2015, 5(4), 1657-1672;
Received: 6 August 2015 / Revised: 23 September 2015 / Accepted: 25 September 2015 / Published: 5 October 2015
(This article belongs to the Special Issue Electrocatalysis in Fuel Cells)
Indole-6-carboxylic acid (ICA) and 3,4-ethylenedioxythiophene (EDOT) are copolymerized electrochemically on a stainless steel (SS) electrode to obtain poly(indole-6-carboxylic acid-co-3,4-ethylenedioxythiophene)s (P(ICA-co-EDOT))s. The morphology of P(ICA-co-EDOT)s is checked using scanning electron microscopy (SEM), and the SEM images reveal that these films are composed of highly porous fibers when the feed molar ratio of ICA/EDOT is greater than 3/2. Platinum particles can be electrochemically deposited into the P(ICA-co-EDOT)s and PICA films to obtain P(ICA-co-EDOT)s-Pt and PICA-Pt composite electrodes, respectively. These composite electrodes are further characterized using X-ray photoelectron spectroscopy (XPS), SEM, X-ray diffraction analysis (XRD), and cyclic voltammetry (CV). The SEM result indicates that Pt particles disperse more uniformly into the highly porous P(ICA3-co-EDOT2) fibers (feed molar ratio of ICA/EDOT = 3/2). The P(ICA3-co-EDOT2)-Pt nanocomposite electrode exhibited excellent catalytic activity for the electrooxidation of methanol in these electrodes, which reveals that P(ICA3-co-EDOT2)-Pt nanocomposite electrodes are more promising for application in an electrocatalyst as a support material. View Full-Text
Keywords: indole-6-carboxylic acid; 3,4-ethylenedioxythiophene; copolymer; methanol; electrocatalyst indole-6-carboxylic acid; 3,4-ethylenedioxythiophene; copolymer; methanol; electrocatalyst
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Wu, T.-Y.; Kuo, C.-W.; Chen, Y.-L.; Chang, J.-K. Copolymers Based on Indole-6-Carboxylic Acid and 3,4-Ethylenedioxythiophene as Platinum Catalyst Support for Methanol Oxidation. Catalysts 2015, 5, 1657-1672.

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