Electrocatalytic oxidation of sulfite at polymeric iron tetra (4-aminophenyl) porphyrin—modified electrode

Lucero, M.; Ramı́rez, Galo; Riquelme, Andrea; Azócar, Manuel; Isaacs, Mauricio; Armijo, Francisco; Förster, Johannes; Trollund, E.; Aguirre, Marı́a J.; Lexa, Doris

doi:10.1016/j.molcata.2004.04.045

Cited by 42 publications

(17 citation statements)

References 19 publications

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“…7 Several electrochemical techniques and electrode materials have been explored in the research of their detection, determination and electrochemical oxidation. It has been demonstrated also that sulfite can be electrocatalyzed oxidatively with a glassy carbon electrode (GCE) that has been chemically modified with iron hexacyanoferrate film, 8 polymeric iron tetra(4-aminophenyl) porphyrin, 9 cobalt pentacyanonitrosylferrate film 10 or polymer films. 11 A metal aluminum electrode modified with nickel pentacyanonitrosylferrate film 12 and a platinum-based glassy carbon electrode (Pt-CME) 13 were also investigated in the catalytic electrochemical oxidation of sulfite.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of sulfite by acetylferrocene at glassy carbon electrode

Zuo-ning

Liu

2005

Applied Organom Chemis

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The electrochemical oxidation of sulfite catalyzed by acetylferrocene (AFc) at a glassy carbon electrode (GCE) in 0.2 M NaClO 4 aqueous solution has been studied by cyclic voltammetry. Although sulfite itself showed a sluggish electrochemical response at the GCE, the response could be enhanced greatly by using AFc as a mediator, which enables a sensitive determination of the substrate (sulfite). The reaction rate constant for catalytic oxidation was evaluated as (7.02 ± 0.05) × 10 4 M −1 s −1 by chronoamperometry. Experimental conditions that maximize the current efficiency of the electrocatalytic oxidation, such as the pH and both the catalyst (AFc) and substrate (sulfite) concentrations, were also investigated. The electrochemical kinetics of electrocatalytic oxidation of sulfite by AFc has been studied by cyclic voltammetry. In the presence of 5 × 10 −4 M AFc, the oxidation current is proportional to the sulfite concentration and the calibration plot was linear over the concentration range 2 × 10 −4 -2.4 × 10 −3 M. This result can be applied in the determination of real samples.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic oxidation of sulfite by acetylferrocene at glassy carbon electrode

Zuo-ning

Liu

2005

Applied Organom Chemis

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“…Thin films of TAPP and TAPP-(Fe III chloride) (MidCentury Co) were prepared by electropolymerization. [16] The electropolymerization was carried out by means of consecutive potential cycles at 0.2 V s À1 between À1.6 and 1.5 V in a N,N'-dimethylformamide (DMF) + tetrabutylammonium perchlorate solution (0.1 m) containing either 0.1 mm TAPP-(Fe III chloride) or 0.1 mm TAPP. TAPP and TAPP-(Fe III chloride) were used without further purification.…”

Section: Methodsmentioning

confidence: 99%

“…To identify the redox couple corresponding to the Fe-melanin system, we have electropolymerized TAPP-(Fe III chloride) and iron-free TAPP [16] on AuA C H T U N G T R E N N U N G (111) substrates. The porphyrin contains octahedrally coordinated Fe bound to the organic material.…”

Section: Xanes Characterizationmentioning

confidence: 99%

Electrocatalytic and Magnetic Properties of Ultrathin Nanostructured Iron–Melanin Films on Au(111)

Orive

Dip

Gimeno

et al. 2006

Chemistry A European J

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We have prepared ultrathin, nanostructured melanin films on Au(111) by means of electrochemical self-assembly. These films were characterized by using Auger electron spectroscopy, X-ray absorption near-edge structure spectroscopy, scanning tunneling microscopy, magnetic force microscopy, and electrochemical techniques. Two types of nanostructures are present in the film: melanin nanoparticles and Fe(3)O(4) nanoparticles. The melanin nanoparticles contain Fe bonded to oxygen-containing phenolic groups in an octahedral configuration similar to that found in Fe(2)O(3). The inorganic-organic composite exhibits magnetic properties and catalyzes the electroreduction of hydrogen peroxide in alkaline and neutral electrolyte solutions. The electrocatalytic activity depends on the Fe-bound melanin and appears to be similar to that found for Fe-porphyrins.

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“…There are two irreversible waves at E pa + 0.97 V (process II) and another with an E pc = À0.62 V (process IV'). When potential is continuously scanned at this range potential, processes I/I' and II disappear, since an overoxidation process of the conducting polymer take place toward very high positive potentials [24]. The process ascribed as II could be associated with an oxidation of free amino group remaining in the structure of poly-[Fe II (diaphen) 3 ].…”

Section: Micro-raman Spectroscopymentioning

confidence: 99%

Electrochemical Properties of a Conducting Film Derived from Iron(II) Tris(diaminopolypyridyl) Complex in the S(IV) Oxoanions Reduction

et al. 2011

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A new conducting film derived from the complex [Fe (diaphen) À reduction in an ethanol/water solution. Electrocatalysis is centered at the p ring of phenanthroline. Rotating disk electrode studies showed a 0.117 V/dec Tafel slope, suggesting an EC process where the electrochemical process is the determining step. The chemical step was studied by UV-vis spectroelectrochemistry. Amperometric behavior showed a linear range between 47.5 mM to 417 mM and the LOD was 19.5 mM.

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Electrocatalytic oxidation of sulfite at polymeric iron tetra (4-aminophenyl) porphyrin—modified electrode

Cited by 42 publications

References 19 publications

Electrocatalytic oxidation of sulfite by acetylferrocene at glassy carbon electrode

Electrocatalytic oxidation of sulfite by acetylferrocene at glassy carbon electrode

Electrocatalytic and Magnetic Properties of Ultrathin Nanostructured Iron–Melanin Films on Au(111)

Electrochemical Properties of a Conducting Film Derived from Iron(II) Tris(diaminopolypyridyl) Complex in the S(IV) Oxoanions Reduction

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