Electrochemical behavior of poly(3-hexylthiophene). Controlling factors of electric current in electrochemical oxidation of poly(3-hexylthiophene)s in a solution

Yamamoto, Takakazu; Honda, Yuichi; Sata, Takao; Kokubo, Hisashi

doi:10.1016/j.polymer.2003.12.061

Cited by 12 publications

(7 citation statements)

References 25 publications

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“…where n ) 1 is the number of electrons transferred, F ) 96487 C/mol is Faraday's constant, R ) 8.314 J/mol • K is the gas constant, T ) 303 K is the temperature, and C R * (mol/L) is the initial ferrocyanide concentration, and v ) 0.05 V/s is the scan rate. The effective diffusion coefficient of K 4 Fe(CN) 6 was calculated as D R ) 5.79 × 10 -6 cm 2 /s from the value of i p using eq 1 with a flat sheet of stainless steel as the working electrode (A ) 7 cm 2 ) (19), which is comparable with that previously reported (∼8 × 10 -6 cm 2 /s; 35 °C) (20). The stainless steel was cleaned prior to tests using 0.5 M H 2 SO 4 .…”

Section: Methodssupporting

confidence: 83%

“…The reactors were then removed from the glovebox, and CVs were conducted over the range of −0.2 V to +1.0 V. The peak current, i p (A) and effective area of the working electrode was obtained using Matsuda’s equation: i p = 0.4464 × 10 − 3 n 3 / 2 F 3 / 2 A ( R T ) − 1 / 2 D 1 / 2 C R * v 1 / 2 where n = 1 is the number of electrons transferred, F = 96487 C/mol is Faraday’s constant, R = 8.314 J/mol·K is the gas constant, T = 303 K is the temperature, and C R * (mol/L) is the initial ferrocyanide concentration, and v = 0.05 V/s is the scan rate. The effective diffusion coefficient of K 4 Fe(CN) 6 was calculated as D R = 5.79 × 10 −6 cm 2 /s from the value of i p using eq with a flat sheet of stainless steel as the working electrode ( A = 7 cm 2 ) , which is comparable with that previously reported (∼8 × 10 −6 cm 2 /s; 35 °C) . The stainless steel was cleaned prior to tests using 0.5 M H 2 SO 4 .…”

Section: Methodssupporting

confidence: 75%

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Use of Carbon Mesh Anodes and the Effect of Different Pretreatment Methods on Power Production in Microbial Fuel Cells

Wang

Cheng

Feng

et al. 2009

Environ. Sci. Technol.

499

189

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Flat electrodes are useful in microbial fuel cells (MFCs) as close electrode spacing improves power generation. Carbon cloth and carbon paper materials typically used in hydrogen fuel cells, however, are prohibitively expensive for use in MFCs. An inexpensive carbon mesh material was examined here as a substantially less expensive alternative to these materials for the anode in an MFC. Pretreatment of the carbon mesh was needed to ensure adequate MFC performance. Heating the carbon mesh in a muffle furnace (450 degrees C for 30 min) resulted in a maximum power density of 922 mW/m2 (46 W/m3) with this heat-treated anode, which was 3% more power than that produced using a mesh anode cleaned with acetone (893 mW/ m2; 45 W/m3). This power density with heating was only 7% less than that achieved with carbon cloth treated by a high temperature ammonia gas process (988 mW/m2; 49 W/m3). When the carbon mesh was treated by the ammonia gas process, power increased to 1015 mW/m2(51 W/m3). Analysis of the cleaned or heated surfaces showed these processes decreased atomic O/C ratio, indicating removal of contaminants that interfered with charge transfer. Ammonia gas treatment also increased the atomic N/C ratio, suggesting that this process produced nitrogen related functional groups that facilitated electron transfer. These results show that low cost heat-treated carbon mesh materials can be used as the anode in an MFC, providing good performance and even exceeding performance of carbon cloth anodes.

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Section: Methodssupporting

confidence: 83%

Section: Methodssupporting

confidence: 75%

Use of Carbon Mesh Anodes and the Effect of Different Pretreatment Methods on Power Production in Microbial Fuel Cells

Wang

Cheng

Feng

et al. 2009

Environ. Sci. Technol.

499

189

View full text Add to dashboard Cite

show abstract

“…16,32 From Table II, we find that ⌬E varies from 148 mV (for PFDMS (M n ϭ 2.79 ϫ 10 5 )) to 162 mV (for PFDMS (M n ϭ 2.9 ϫ 10 4 )), and similar phenomena are observed for PFMPS. ⌬E decreased when the molecular weight increased.…”

Section: Methodssupporting

confidence: 68%

Synthesis of poly(ferrocenylsilanes) with different molecular weight and their electrochemical behavior

Wang¹,

Wang²,

Wang³

et al. 2006

J of Applied Polymer Sci

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A series of poly(ferrocenylsilanes) (PFS) with different molecular weight have been prepared via the thermal ring-opening polymerization of the corresponding monomers. The electrochemical behavior of poly(ferrocenyldimethylsilane) (PFDMS) and poly(ferrocenylmethylphenylsilane) (PFMPS) in solutions were investigated by cyclic voltammetry (CV). It was found that PFS could be adsorbed and electrodeposited on the Pt electrode surface, and the electroactive multilayer films formed on the Pt electrode surface influenced the shape of the voltammogram. The redox potential varied with the molecular weight slightly, and ⌬E 1/2 became smaller with the increase in molecular weight.

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“…Figure (curve 1) shows the oxidation peaks of RRPHTh at 0.84 and 1.23 V and reduction peaks at 0.98 and 1.21 V. In Figure (curve 2) the ND–RRPHTh films reveal oxidation peaks at 0.24, 0.33, 0.54, and 0.80 V with the reduction potential at 0.14, 0.46, and 1.17 V. The cyclic voltammogram has shown reversibility. The shoulder at 1.21 V could be due to oxidation of RRPHTh; the redox process also shows reversibility. The observed wide anodic and cathodic peaks potential is probably caused by the slow diffusion of the dopant anions (TBATFB) in and out of the film.…”

Section: Resultsmentioning

confidence: 98%

Novel Nanohybrid Structured Regioregular Polyhexylthiophene Blend Films for Photoelectrochemical Energy Applications

et al. 2011

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The present study shows for the first time the novel photoelectrochemical studies on nanohybrid films fabricated by blending regioregular polyhexylthiophene (RRPHTh) conducting polymer with nanodiamond (ND) nanoparticles. The photoelectrochemical properties of NDÀ RRPHTh nanohybrid films have been compared by blending RRPHTh with zinc oxide (ZnO) and titanium oxide (TiO 2 ) nanoparticles deposited on indium tin oxide (ITO) coated glass plates, n-type silicon, and gold-coated glass substrates. The NDÀRRPHTh film has revealed more promising morphological and photoelectrochemical properties than RRPHTh, ZnOÀRRPHTh, and TiOÀ-RRPHTh nanohybrid films. The photoelectrochemical study has shown the photoinduced electron transfer in NDÀRRPHTh nanohybrid films where RRPHTh acts as the donor and ND as the acceptor, providing a molecular approach to high-efficiency photoelectrochemical conversion properties. The photoelectrochemical properties of NDÀRRPHTh deposited on either n-type silicon or ITO-coated glass plates in an electrolyte containing tetrabutylammonium tetrafluoroborate (TBATFB) is around 8À10 times higher in current density and energy conversion efficiencies compared to RRPHTh, ZnOÀRRPHTh, and TiO 2 ÀRRPHTh nanohybrid films.

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Electrochemical behavior of poly(3-hexylthiophene). Controlling factors of electric current in electrochemical oxidation of poly(3-hexylthiophene)s in a solution

Cited by 12 publications

References 25 publications

Use of Carbon Mesh Anodes and the Effect of Different Pretreatment Methods on Power Production in Microbial Fuel Cells

Use of Carbon Mesh Anodes and the Effect of Different Pretreatment Methods on Power Production in Microbial Fuel Cells

Synthesis of poly(ferrocenylsilanes) with different molecular weight and their electrochemical behavior

Novel Nanohybrid Structured Regioregular Polyhexylthiophene Blend Films for Photoelectrochemical Energy Applications

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