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Electro-synthesis of novel nanostructured PEDOT films and their application as catalyst support.

Zhou C, Liu Z, Yan Y, Du X, Mai YW, Ringer S - Nanoscale Res Lett (2011)

Bottom Line: The results indicate that the hierarchical structured PEDOT film doped with nitric ions displays a 'lunar craters' porous morphology consisting of PEDOT nano-sheets with a thickness of less than 2 nm.The effect of counter ions on the electro-polymerization, the electrochemistry, and the morphology of the polymer film was studied.Compared with PEDOT film doped with nitric acid, PEDOT film deposited in the presence of chlorine ions shows irregular morphology and less electrochemical activity.

View Article: PubMed Central - HTML - PubMed

Affiliation: Australian Centre for Microscopy and Microanalysis, University of Sydney, Sydney, NSW 2006, Australia. zongwen.liu@sydney.edu.au.

ABSTRACT
Poly(3,4-ethylenedioxythiophene) (PEDOT) films doped with nitric and chlorine ions have been electrochemically deposited simply by a one-step electrochemical method in an aqueous media in the absence of any surfactant. The fabricated PEDOT films were characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The results indicate that the hierarchical structured PEDOT film doped with nitric ions displays a 'lunar craters' porous morphology consisting of PEDOT nano-sheets with a thickness of less than 2 nm. The effect of counter ions on the electro-polymerization, the electrochemistry, and the morphology of the polymer film was studied. Compared with PEDOT film doped with nitric acid, PEDOT film deposited in the presence of chlorine ions shows irregular morphology and less electrochemical activity. The specific nanostructure of the polymer was further studied as catalyst support for platinum nanoparticles to methanol electro-oxidation.

No MeSH data available.


Related in: MedlinePlus

Cyclic voltammograms of Pt in 0.01 M EDOT + 0.1 M KNO3 and 0.01 M EDOT + 0.1 M KCl. Scan rate: 50 mV/s.
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Figure 1: Cyclic voltammograms of Pt in 0.01 M EDOT + 0.1 M KNO3 and 0.01 M EDOT + 0.1 M KCl. Scan rate: 50 mV/s.

Mentions: Figure 1 shows the cyclic voltammograms of the electrochemical oxidation of EDOT on the Pt electrode with Cl- and NO3- as doping ions, respectively. In the case of nitric ions (Figure 1a), two oxidation peaks appeared at about 1.15 and approx. 1.37 V. Similar to the previous report [18], the first peak can be attributed to the oxidation of the EDOT and the second peak may be related to the over-oxidation of the preformed PEDOT or its oligomers. However, in the case of chlorine ions (Figure 1b), only a poorly resolved current peak at 1.25 V appeared. The current is much less than the one with nitric ions, although the other parameters are the same. The electro-polymerization of the EDOT in the presence of chlorine ions is quite different from that previously reported in the presence of perchlorate ions [18] and dodecylsulphate anions [12]. Obviously the electrochemical process of the electro-deposition of PEDOT doped with chlorine ions needs further investigation.


Electro-synthesis of novel nanostructured PEDOT films and their application as catalyst support.

Zhou C, Liu Z, Yan Y, Du X, Mai YW, Ringer S - Nanoscale Res Lett (2011)

Cyclic voltammograms of Pt in 0.01 M EDOT + 0.1 M KNO3 and 0.01 M EDOT + 0.1 M KCl. Scan rate: 50 mV/s.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211454&req=5

Figure 1: Cyclic voltammograms of Pt in 0.01 M EDOT + 0.1 M KNO3 and 0.01 M EDOT + 0.1 M KCl. Scan rate: 50 mV/s.
Mentions: Figure 1 shows the cyclic voltammograms of the electrochemical oxidation of EDOT on the Pt electrode with Cl- and NO3- as doping ions, respectively. In the case of nitric ions (Figure 1a), two oxidation peaks appeared at about 1.15 and approx. 1.37 V. Similar to the previous report [18], the first peak can be attributed to the oxidation of the EDOT and the second peak may be related to the over-oxidation of the preformed PEDOT or its oligomers. However, in the case of chlorine ions (Figure 1b), only a poorly resolved current peak at 1.25 V appeared. The current is much less than the one with nitric ions, although the other parameters are the same. The electro-polymerization of the EDOT in the presence of chlorine ions is quite different from that previously reported in the presence of perchlorate ions [18] and dodecylsulphate anions [12]. Obviously the electrochemical process of the electro-deposition of PEDOT doped with chlorine ions needs further investigation.

Bottom Line: The results indicate that the hierarchical structured PEDOT film doped with nitric ions displays a 'lunar craters' porous morphology consisting of PEDOT nano-sheets with a thickness of less than 2 nm.The effect of counter ions on the electro-polymerization, the electrochemistry, and the morphology of the polymer film was studied.Compared with PEDOT film doped with nitric acid, PEDOT film deposited in the presence of chlorine ions shows irregular morphology and less electrochemical activity.

View Article: PubMed Central - HTML - PubMed

Affiliation: Australian Centre for Microscopy and Microanalysis, University of Sydney, Sydney, NSW 2006, Australia. zongwen.liu@sydney.edu.au.

ABSTRACT
Poly(3,4-ethylenedioxythiophene) (PEDOT) films doped with nitric and chlorine ions have been electrochemically deposited simply by a one-step electrochemical method in an aqueous media in the absence of any surfactant. The fabricated PEDOT films were characterized by scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The results indicate that the hierarchical structured PEDOT film doped with nitric ions displays a 'lunar craters' porous morphology consisting of PEDOT nano-sheets with a thickness of less than 2 nm. The effect of counter ions on the electro-polymerization, the electrochemistry, and the morphology of the polymer film was studied. Compared with PEDOT film doped with nitric acid, PEDOT film deposited in the presence of chlorine ions shows irregular morphology and less electrochemical activity. The specific nanostructure of the polymer was further studied as catalyst support for platinum nanoparticles to methanol electro-oxidation.

No MeSH data available.


Related in: MedlinePlus