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Kelaidopoulou, A.; Abelidou, E.; Kokkinidis, G.

doi:10.1023/a:1003796616083

Cited by 50 publications

(28 citation statements)

References 42 publications

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“…Swathirajan and Mikhail [2] investigated the effect of Pt-Sn catalysts electrodeposited on poly(3-methylthiophene) towards oxidation of methanol. Poly(2-hydroxy-3-aminophenazine) has been used as a matrix to disperse Pt, Pt-Sn and Pt-Ru particles and the alloy systems were reported to have higher activity towards methanol oxidation in perchloric acid medium than Pt alone [7]. Pt-Ru nanoparticles were deposited on polyaniline films and their catalytic activity was tested for methanol electrooxidation by Kessler and Castro Luna [33].…”

Section: Electrooxidation Of Methanol On Pt-ni Modified Polyindole Sumentioning

confidence: 99%

“…Among the polymers that have found favour for use as host matrices for the development of such systems are mainly polyaniline, polypyrrole and polythiophene by virtue of their excellent conducting properties and very good adhesion to the substrate electrode. A number of other polymers have also been found to be conducive for such an application and they are poly(3,4-ethylenedioxythiophene) [6], poly(2-hydroxy-3-aminophenazine) [7], poly(o-aminophenol) [8], poly(o-phenylenediamine) [9], polyvinylpyridine [10], poly(4-aminoquinaldine) [11] and poly(o-anisidine) [12]. The emphasis in all these studies has been on preparation and characterization of a support material in the form of a conducting polymer that is suitable for the dispersion of Pt and different alloys for electrocat-alytic purposes.…”

Section: Introductionmentioning

confidence: 99%

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Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Nagashree

Raviraj

Ahmed

2010

Electrochimica Acta

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a b s t r a c tElectrocatalytic activity of the Pt microparticles dispersed into polyindole (PIn) films obtained by electropolymerization on carbon paste electrodes (CPE) towards methanol oxidation in perchloric acid medium has been demonstrated and investigated using cyclic voltammetry, potentiodynamic polarization, chronoamperometry and impedance spectroscopic techniques. The results show that PIn films obtained on these electrodes serve as good host matrices for the dispersion of Pt microparticles and exhibit good catalytic activity towards the electrooxidation of methanol compared to bulk Pt and CPE modified with Pt. The morphology and composition of the modified and unmodified films were obtained using SEM and EDX techniques. The effect of scan rate, amount of Pt and concentration of methanol, on the activity of the electrode has been tested. The effect of alloying Pt with different amounts of Ni was studied and it was found that when the metals are deposited from a solution containing the metal salts in 1:1 ratio the activity towards methanol oxidation was significantly enhanced.

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Section: Electrooxidation Of Methanol On Pt-ni Modified Polyindole Sumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Nagashree

Raviraj

Ahmed

2010

Electrochimica Acta

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“…There have been continuing efforts, however, at finding other conducting polymers as suitable host matrices for developing polymer modified electrodes. Some of the other polymers that have been found to be conducive for such an application are poly (2-hydroxy-3-aminophenazine) [15], poly (o-aminophenol) [16] and poly (o-phenylenediamine) [17].…”

Section: Introductionmentioning

confidence: 99%

“…The use of most of these systems have, however, been restricted to oxidation of methanol in acid medium [7][8][9][10][11][12][15][16][17] wherein the poisoning species strongly bind to the catalytic centers imposing limitation in the kinetics of the methanol oxidation leading to polarization losses. It was after Parsons and Van der Noot [2] suggestion of the possibility of using alkaline media for the organic fuel cell reactions that many studies have been oriented in this direction.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of methanol on Pt modified polyaniline in alkaline medium

Nagashree

Ahmed

2008

Synthetic Metals

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a b s t r a c tA comparative study of the electrocatalytic oxidation of methanol is made in NaOH, Na 2 CO 3 and NaHCO 3 on bare Pt (Pt), polyaniline covered Pt (PANI) and Pt modified polyaniline film on Pt (Pt/PANI) using cyclic voltammetry, polarization, ac impedance spectroscopy and chronoamperometric techniques at 25• C. The cyclic voltammetry and polarization studies show that the potentials at which methanol oxidation commences on different electrodes in each of the alkaline medium examined follow the trend Pt/PANI < Pt < PANI whereas the potentials for initiation of oxidation on each electrode in different alkaline media follow the order NaHCO 3 > Na 2 CO 3 > NaOH. The oxidation current is highest and charge transfer resistance lowest for Pt/PANI films compared to Pt in all the media studied. However, for the same Pt loading Pt/PANI films exhibit larger oxidation currents in NaOH followed by Na 2 CO 3 and NaHCO 3 . The Tafel slope for methanol oxidation on Pt/PANI in NaOH, Na 2 CO 3 and NaHCO 3 has a value of about 115 mV decade −1 . The chronoamperometric response of the Pt/PANI film at the peak potential for methanol oxidation shows lesser sensitivity to poisoning by CO compared to bare Pt and platinised Pt (Pt/Pt).

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“…Other UPD systems were studied by different authors. [12][13][14][15][16] More recently, Pd and Pd alloys have appeared in the literature with very interesting results. [17][18][19] Following this subject, Waszczuk et al synthesized nanoparticles containing Pd, Ru and Pt.…”

Section: Introductionmentioning

confidence: 99%

Active Pt-PbOx/C anodes to promote the formic acid oxidation in presence of sulfuric acid

Buzzo¹,

Niquirilo²,

Suffredini³

2010

J. Braz. Chem. Soc.

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Este trabalho propõe estudar ânodos baseados em Pt e PbO x frente à reação de oxidação do ácido fórmico. Os materiais estudados foram sintetizados por uma metodologia sol-gel adaptada. Estudos voltamétricos mostraram que o processo de oxidação ocorre em potenciais extremamente baixos. Este bom desempenho foi comprovado por meio de curvas de polarização e cronoamperometrias.The performance of Pt-PbO x -based catalysts to promote the formic acid oxidation is described here. All materials were synthesized by a modified sol-gel method. Voltammetric studies showed that the Pt-PbO x /C anode starts the oxidation process at extremely low potentials. Quasi-stationary polarization experiments and current vs. time measurements confirmed this affirmation.

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Untitled

Cited by 50 publications

References 42 publications

Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Carbon paste electrodes modified by Pt and Pt–Ni microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol

Electrocatalytic oxidation of methanol on Pt modified polyaniline in alkaline medium

Active Pt-PbOx/C anodes to promote the formic acid oxidation in presence of sulfuric acid

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