Poly(o-aminophenol) film prepared in the presence of sodium dodecyl sulfate: Application for nickel ion dispersion and the electrocatalytic oxidation of methanol and ethylene glycol

Ojani, Reza; Raoof, Jahan Bakhsh; Fathi, Shahla

doi:10.1016/j.electacta.2008.10.023

Cited by 85 publications

(60 citation statements)

References 41 publications

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“…Also, the fact that the growth of the polymer starts after an induction time long after the peaks corresponding to o-AP radical cation and dimer become small was considered by Ortega as a confirmation that the propagation process involves further oxidation and coupling of 3APZ. The electrochemical synthesis of POAP on the surface of a carbon paste electrode (CPE) in the presence of sodium dodecyl sulfate (SDS) is described by Ojani et al [13]. These authors show, as Barbero [10] and Ortega [12], that in the absence of SDS, o-AP is irreversibly oxidized at positive potential values (0.7 V versus Ag/AgCl/KCl 3 M) without corresponding cathodic processes in the reverse scan.…”

Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 88%

“…This effect was attributed by Ojani et al [13] to soluble products produced on the electrode surface that do not allow the monomer to reach the electrode surface and produce the monocation radical. Therefore, prolonged potential cycling was needed for transformation of the soluble 3APZ to POAP, which was observed within a potential range (0.2 V < E < 0.3 V) less positive than that of 3APZ.…”

Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 99%

“…The rate of polymerization also increased considerably in the presence of SDS and the peaks attributed to POAP grew simultaneously with that corresponding to 3APZ growth. It is remarked in [13] that in the presence of SDS the monomer, o-AP can easily reach the electrode surface and produce more monocation radical than in absence of SDS. The rate of polymerization depends on the SDS concentration.…”

Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 99%

“…However, the radical cations can also react quickly near the electrode surface to produce soluble products by hydrolysis. Then, besides a film with a ladder structure, Gonçalves It was demonstrated that some substances, such as sodium dodecyl sulphate [13], increase the rate of polymerization of o-aminophenol in acid media because in its presence the monomer can more easily reach the electrode surface and produce more monocation radical, than in its absence. Also, some electrode surface pretreatments affect the electropolymerization rate of o-aminophenol.…”

Section: Isrn Polymer Sciencementioning

confidence: 99%

“…With regard to mechanisms of POAP formation, most authors [10,[12][13][14]19] postulate that in acidic solutions the favored path after oxidation of o-AP to o-AP •+ is dimerization of o-AP •+ with N-C coupling resulting in the cyclic dimer 3-APZ. Oxidation of 3APZ leads a ladder structure polymer with phenoxazine units.…”

Section: Isrn Polymer Sciencementioning

confidence: 99%

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Electrosynthesis and Spectroscopic Characterization of Poly(o-Aminophenol) Film Electrodes

Tucceri

Arnal

Scian

2012

ISRN Polymer Science

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This review, which is divided into three parts, concerns electrochemical synthesis, spectroscopic characterization, and formation mechanisms of poly(o-aminophenol) (POAP) film electrodes. The first part of this review is devoted to describe the electropolymerization process of o-aminophenol on different electrode materials and in different electrolyte media by employing both potentiodynamic and potentiostatic methods. The second part refers to spectroscopic studies carried out by different authors to both, identify the products of the o-aminophenol electrooxidation and elucidate the chemical structure of poly(o-aminophenol) film electrodes. The third part shows the different mechanisms formulated to interpret the POAP films formation from both acid and basic solutions of o-AP. Also, some electrochemical and spectroscopic data which allowed to propos the corresponding formation mechanisms, especially in basic media, are described.

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Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 88%

Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 99%

Section: Electropolymerization Of O-aminophenol In Acidic Mediamentioning

confidence: 99%

Section: Isrn Polymer Sciencementioning

confidence: 99%

Section: Isrn Polymer Sciencementioning

confidence: 99%

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Electrosynthesis and Spectroscopic Characterization of Poly(o-Aminophenol) Film Electrodes

Tucceri

Arnal

Scian

2012

ISRN Polymer Science

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Biomass‐Derived 3D Carbon Aerogel with Carbon Shell‐Confined Binary Metallic Nanoparticles in CNTs as an Efficient Electrocatalyst for Microfluidic Direct Ethylene Glycol Fuel Cells

kumar

Manthiram

2019

Advanced Energy Materials

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as biological renewability, low toxicity, and easy storability. [5] Despite the recent improvements in DEGFCs, the technology is still hindered by the problems of conventional platinum (Pt) anode catalysts, such as surface poisoning, high cost, and scarcity. [6] Recently, palladium (Pd) nanostructures have emerged as a promising EG oxidation catalyst in alkaline media, eliminating the necessity of the Pt nanocatalyst for EG oxidation. [7] However, Pd nanocatalysts are prone to rapid deterioration under surface poisoning and instability. [8] The formation of bimetals with non-precious transition metals (PdM, M = Ni, Co, Fe, Cu, Mo, Sn, etc.) is an efficient strategy to improve the stability without sacrificing the catalytic activity. [9] The oxophilic nickel (Ni) is recognized as a naturally abundant metal with enhanced corrosion resistance. [10] The inclusion of Ni into the crystal lattice of Pd facilitates active sites for -OH adsorption (OH ads ) and weakens their interaction with reaction intermediates adsorbed onto the Pd surface. [10,11] In parallel, metal nanoparticles decorated on carbon supports have also been shown to improve EG oxidation via their high electrical conductivity and catalytic activity. [12] The 3D porous structure of carbon nanotubes (CNTs) could considerably control the aggregation or stacking of the adjacent subunits, facilitating a uniform distribution of metal nanoparticles and increasing the number of accessible reactive sites for catalytic surface reactions. [13] However, the conventional strategy used for the fabrication of metal nanoparticles anchored onto CNTs involves strenuous multistep procedures, and the acidification process involved distorts the interconnected conduction channels, which consequently limits the EG oxidation kinetics. [14] Hence, the development of catalytically active metal nanoparticles encased within the graphitic layers of CNTs is highly desirable. [15] The mass transfer capability and catalytic activity of carbon nanostructures could be further improved with the development of porosity and heteroatom doping into the carbon skeleton. [16] Recently, 3D carbon aerogels (CAs) have grasped prevailing research attention as free-standing electrodes for diverse energy applications owing to their large specific surface area, low density, interconnected fibrous structure, and rapid charge transport pathways. [17,18] In this context, Pd nanoparticles Flexible and 3D carbon aerogels (CAs) composed of carbon nanotubes (CNTs) with carbon shell-confined binary palladium-nickel (Pd x -Ni y ) nanocatalysts on carbon fibers (Pd x -Ni y /NSCNT/CA) have been developed through a facile chemical vapor deposition method. The 3D porous carbon network and the synergistic effect of carbon shell-confined bimetal nanoparticles of rationally constructed aerogels facilitate enhanced electrocatalytic and antipoisoning activities toward ethylene glycol (EG) oxidation reaction compared to the commercial Pt/C catalyst. With the 3D morphological features and direct growth of Pd-Ni bimet...

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Binary NiCu oxide nanoparticles onto graphite as promoting nanocatalysts for ethanol electro‐oxidation process

Afify,

Hameed,

Ghayad

2024

Applied Organom Chemis

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A facile and reduced cost fabrication protocol was followed to have a series of nickel oxide nanospecies onto graphite support with introducing varied copper oxide wt.% values (NiCuO/T). The co‐precipitation of metallic hydroxide particles onto carbonaceous surfaces and their subsequent burning at 400°C were sufficient to prepare mixed transition metal oxides. Suitable analysis tools were exploited to fully characterize the obtained nanopowders using scanning electron microscopy, transmission electron microscopy, X‐ray diffraction spectroscopy, X‐ray photoelectron spectroscopy, and energy dispersive X‐ray analysis. Outstanding performances of the formed nanocatalysts for catalyzing ethanol electro‐oxidation reaction were measured especially in presence of 15 wt.% copper oxide content. The onset potential (Eonset) value of alcohol oxidation process was negatively shifted at dispersed NiO nanoparticles onto graphite after doping with copper oxide nanospecies. This promoted activity of prepared nanomaterials could be explained by their increased active sites when binary metallic oxides were incorporated. Electrochemical impedance spectroscopy studies demonstrated much lowered resistances in alkaline solution containing ethanol molecules to ascertain the enhanced behavior of NiCuO/T nanocatalysts. Moreover, their good stability attitude encouraged the application of doped nanomaterials with copper oxide for fuel cells application.

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Poly(o-aminophenol) film prepared in the presence of sodium dodecyl sulfate: Application for nickel ion dispersion and the electrocatalytic oxidation of methanol and ethylene glycol

Cited by 85 publications

References 41 publications

Electrosynthesis and Spectroscopic Characterization of Poly(o-Aminophenol) Film Electrodes

Electrosynthesis and Spectroscopic Characterization of Poly(o-Aminophenol) Film Electrodes

Biomass‐Derived 3D Carbon Aerogel with Carbon Shell‐Confined Binary Metallic Nanoparticles in CNTs as an Efficient Electrocatalyst for Microfluidic Direct Ethylene Glycol Fuel Cells

Binary NiCu oxide nanoparticles onto graphite as promoting nanocatalysts for ethanol electro‐oxidation process

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