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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

Raman spectrum of PEDOT-NO3 film.
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Figure 4: Raman spectrum of PEDOT-NO3 film.

Mentions: Raman studies were carried out to further determine the vibration modes of the films in the wavenumber range of 400 to 2000 cm-1, as shown in Figure 4. The peaks at 1568 and 1500 cm-1 are originated from the asymmetrical stretching of Cα = Cβ, and the most intense peak at 1438 cm-1 can be attributed to the symmetrical stretching of Cα = Cβ (in the monomer EDOT, Cα is the carbon atoms connecting with the sulfur atom, while Cβ is the carbon atoms connecting with Cα). The peaks at 1366 cm-1 are assigned to the Cβ"-Cβ" inter-ring stretching, and the peaks at 1267 cm-1 are assigned to the C-C inter-ring stretching. The peaks at 1100 and 697 cm-1 are assigned to the C-O-C stretching and C-S-C bending, respectively. A peak from C-C anti-symmetrical stretching mode can be seen at 990 cm-1. The resulted spectrum is just similar to those of other results and the absence of any signal in the 650 to 680 cm-1 region of the spectrum could lead to similar conclusion that the electrodeposited PEDOT chains has a highly planar structure [11,16,25].


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)

Raman spectrum of PEDOT-NO3 film.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Raman spectrum of PEDOT-NO3 film.
Mentions: Raman studies were carried out to further determine the vibration modes of the films in the wavenumber range of 400 to 2000 cm-1, as shown in Figure 4. The peaks at 1568 and 1500 cm-1 are originated from the asymmetrical stretching of Cα = Cβ, and the most intense peak at 1438 cm-1 can be attributed to the symmetrical stretching of Cα = Cβ (in the monomer EDOT, Cα is the carbon atoms connecting with the sulfur atom, while Cβ is the carbon atoms connecting with Cα). The peaks at 1366 cm-1 are assigned to the Cβ"-Cβ" inter-ring stretching, and the peaks at 1267 cm-1 are assigned to the C-C inter-ring stretching. The peaks at 1100 and 697 cm-1 are assigned to the C-O-C stretching and C-S-C bending, respectively. A peak from C-C anti-symmetrical stretching mode can be seen at 990 cm-1. The resulted spectrum is just similar to those of other results and the absence of any signal in the 650 to 680 cm-1 region of the spectrum could lead to similar conclusion that the electrodeposited PEDOT chains has a highly planar structure [11,16,25].

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