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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.


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SEM and TEM images of the PEDOT-NO3 film. (a, b)up-surface; (c) the cross section and (d) the back-surface; (e) TEM image; (f) SEM images of PEDOT-Cl film.
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Figure 5: SEM and TEM images of the PEDOT-NO3 film. (a, b)up-surface; (c) the cross section and (d) the back-surface; (e) TEM image; (f) SEM images of PEDOT-Cl film.

Mentions: Based on the above results, the electroactive PEDOT film doped with nitric ions was selected as the catalyst support. The SEM images of the PEDOT film are presented in Figure 5a, b. The polymer film consists of flower-like particles, each comprising of many fine polymer sheets. In the cross-section image of the film (Figure 5c), the sheets seem to connect with each other, leaving countless irregular pores in the film. The thickness of the nanosheets is always less than 10 nm, which is also confirmed by TEM observation (Figure 5d), in which even approx. 2-nm sheet thickness can be identified from the folded edge of the polymer sheets. Due to their high aspect ratio, the nanosheets generally scrolled and bent to minimize the surface energy, similar to the behavior of the graphene nanosheets [26]. On the other side of the film facing to the Pt substrate (Figure 5e), many pores with nanoscale size can be found, which is just like the lunar craters. It should be noted that such nanostructure is not common in the electrodeposited PEDOT films, as no such sheet-like structure was found in electropolymerized PEDOT-Cl materials (Figure 5f).


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)

SEM and TEM images of the PEDOT-NO3 film. (a, b)up-surface; (c) the cross section and (d) the back-surface; (e) TEM image; (f) SEM images of PEDOT-Cl film.
© Copyright Policy - open-access
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3211454&req=5

Figure 5: SEM and TEM images of the PEDOT-NO3 film. (a, b)up-surface; (c) the cross section and (d) the back-surface; (e) TEM image; (f) SEM images of PEDOT-Cl film.
Mentions: Based on the above results, the electroactive PEDOT film doped with nitric ions was selected as the catalyst support. The SEM images of the PEDOT film are presented in Figure 5a, b. The polymer film consists of flower-like particles, each comprising of many fine polymer sheets. In the cross-section image of the film (Figure 5c), the sheets seem to connect with each other, leaving countless irregular pores in the film. The thickness of the nanosheets is always less than 10 nm, which is also confirmed by TEM observation (Figure 5d), in which even approx. 2-nm sheet thickness can be identified from the folded edge of the polymer sheets. Due to their high aspect ratio, the nanosheets generally scrolled and bent to minimize the surface energy, similar to the behavior of the graphene nanosheets [26]. On the other side of the film facing to the Pt substrate (Figure 5e), many pores with nanoscale size can be found, which is just like the lunar craters. It should be noted that such nanostructure is not common in the electrodeposited PEDOT films, as no such sheet-like structure was found in electropolymerized PEDOT-Cl materials (Figure 5f).

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