Network films of conducting polymer-linked polyoxometalate-modified gold nanoparticles: Preparation and electrochemical characterization

Ernst, Andrzej; Żołądek, Sylwia; Wiaderek, Kamila M.; Cox, James A.; Kolary-Zurowska, Aneta; Miecznikowski, Krzysztof; Kulesza, Paweł J.

doi:10.1016/j.electacta.2007.12.053

Cited by 60 publications

(51 citation statements)

References 36 publications

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“…Cyclic Voltammetry 55 Polyoxometalates have previously been employed for the reduction of hydrogen peroxide [43][44][45] . Here both the Fe 3+ -and Cu 2+ -substituted Dawson-doped polypyrrole films were studied for the electrocatalytic reduction of hydrogen peroxide.…”

Section: Catalytic Properties Of the Pom Doped Polypyrrole Filmsmentioning

confidence: 99%

“…Owing to their inherent 5 characteristics, POMs are presented as excellent candidates for electrocatalytic reduction of hydrogen peroxide. [43][44][45] In order to prepare chemically modified electrodes for electrocatalytic reduction of H 2 O 2 , POMs have been immobilized onto modified silica gel, 46 multilayer assemblies 47,48 or ordered mesoporous 10 carbon. 49 In this work, transition metal-substituted Dawson-type POMs were immobilized via doping ion insertion during the electropolymerization of polypyrrole.…”

Section: Introductionmentioning

confidence: 99%

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Transition metal ion-substituted polyoxometalates entrapped in polypyrrole as an electrochemical sensor for hydrogen peroxide

Anwar

Vagin

Laffir

et al. 2012

Analyst

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A conducting polymer was used for the immobilization of various transition metal ion-substituted Dawson-type polyoxometalates (POMs) onto glassy carbon electrodes. Voltammetric responses of films of different thicknesses were stable within the pH domain 2-7 and reveal redox processes associated with the conducting polymer, the entrapped POMs and incorporated metal ions. The resulting POM doped 10 polypyrrole films were found to be extremely stable towards redox switching between the various redox states associated with the incorporated POM. An amperometric sensor for hydrogen peroxide detection based upon the POM doped polymer films was investigated. The detection limits were 0.3 and 0.6 uM, for the Cu 2+ -and Fe 3+ -substituted POM-doped polypyrrole films respectively, with a linear region from 0.1 up to 2mM H 2 O 2 . Surface characterization of the polymer films was carried out using atomic force 15 microscopy, x-ray photoelectron spectroscopy and scanning electron microscopy. IntroductionPolyoxometalates (POMs) are a widely increasing class of inorganic early transition metal-oxide clusters. The structural and compositional diversity among this class of compounds have 20 enabled them to be promising candidates for a wide range of applications across material science, medicine, biotechnology, nanotechnology and catalysis. [1][2][3][4][5][6][7][8][9][10][11][12] The general structure of POMs consists of MO 6 units joined together by edge or corner sharing and connected tetrahedrally to a centrally bonded heteroatom 25 (usually phosphorus or silicon). One of the MO 6 units can be removed from the structure at higher pH and substituted with different metal ions allowing for controllable molecular design.Various strategies have been used for immobilization of POMs onto different surfaces, safeguarding their inherent properties. 30 These include: sol-gel technique, 13 polyoxometalates. 38,39 Despite the high selectivity and sensitivity of enzyme-modified electrodes, 40, 41 the limitation of usage of these systems is related to the difficulty in obtaining the optimal conditions and the lack of the enzymatic activity over a period of time, 42 POMs inside the polymer matrix were accessible for voltammetric studies in acidic medium. The films exhibited stable redox responses in the pH range of 2-7. Surface characterization was carried out using the AFM, XPS and SEM. Electrocatalytic activity of the films containing iron and copper-20 substituted POMs towards the reduction of hydrogen peroxide was studied by amperometry at physiological conditions (pH 6.5) and compared with the performance of the same POMs in solution 50 and immobilized onto an electrode surface via multilayer assemblies. 19 Conducting polymer-based POM-doped 25 polypyrrole films reveal the best analytical characteristics for hydrogen peroxide reduction in comparison with some other approaches. Experimental 30 MaterialsThe potassium salts of all the substituted Dawson type polyoxometalates investigated were synthesized and characterised by both ele...

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Section: Catalytic Properties Of the Pom Doped Polypyrrole Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transition metal ion-substituted polyoxometalates entrapped in polypyrrole as an electrochemical sensor for hydrogen peroxide

Anwar

Vagin

Laffir

et al. 2012

Analyst

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“…Recently, various hybrid systems with POMs have been proposed and studied for solid-state applications [14][15][16]. Common representative examples include the systems containing POMs immobilized within conducting polymers [17], gel matrices [18], Langmuir-Blodgett layers [19], or as adsorbates existing on nanoparticles' surfaces [20][21][22]. A high anionic charge of POM layers or adsorbates permits their application as linking agents during fabrication of three-dimensional network films consisted of anionic and cationic species interconnected via simple electrostatic interactions.…”

Section: Introductionmentioning

confidence: 99%

“…It should be also mentioned that POMs are characterized by the ability to undergo strong spontaneous adsorption on such electrode substrates (or nanosized particles) as carbon, platinum, or gold [20][21][22]. The efficiency of adsorption strongly depends on the POMs composition and the choice of an electrode material [28].…”

Section: Introductionmentioning

confidence: 99%

“…A high anionic charge of POM layers or adsorbates permits their application as linking agents during fabrication of three-dimensional network films consisted of anionic and cationic species interconnected via simple electrostatic interactions. This layer-by-layer concept was applied to the formation of POM-based hybrid films containing conducting polymers [20][21][22][23], positively charged organics like poly(vinylpyridine) or poly(ethylenimine) [24] and transition metal (Fe, Ru, Os, Cu) complexes [2,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

Sosnowska

Góral-Kurbiel

Skunik-Nuckowska

et al. 2013

J Solid State Electrochem

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Preparation and electrochemical behavior of new hybrid materials composed of multi-walled carbon nanotubes (CNTs) that were derivatized with poly(diallyldimethylammonium) chloride and modified with vanadium-mixed addenda Dawson-type heteropolytungstate, [P 2 W 17 VO 62 ] 8− , is described here. These nanostructured composite systems exhibited fast dynamics of charge propagation. They were characterized by the transport (effectively diffusional) kinetic parameter of approximately 8×10 −8 cm −2 s −1/2 and the specific capacitance parameter of 82 F g −1 (at the charging/discharging current of 200 mA g −1 ). The latter parameter for bare CNTs was found to be only 50 F g −1 under analogous conditions. These observations were based on the results of galvanostatic charging-discharging, cyclic voltammetric, and AC impedance spectroscopic measurements. The improved capacitance properties were attributed to the systems' pseudocapacitive features originating from the fast redox transitions of the [P 2 W 17 VO 62 ] 8− polyanions. In addition to the fast redox conduction, the proposed organicinorganic hybrid materials exhibited interesting electrocatalytic activity toward reduction of bromate in the broad concentration range (sensitivity, 0.24 mA cm −2 mmol −1 dm 3 ).

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Electrocatalysis by Nanostructured Conducting Polymers

Zhang

2010

Nanostructured Conductive Polymers

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Many conducting polymers, such as polyaniline [1][2][3], polypyrrole [4][5][6], polythiophene [7,8], poly(p-phenylene) [9] and so on, have been synthesized, since the exciting discovery of the dramatic increase in conductivity of polyacetylene after doping was achieved 30 years ago [10]. Clearly, the appearance of conducting polymers opened a significant way to prepare a new type of material. The conducting polymers have received a great deal of interest and are particularly appealing because they exhibit electrical, electronic, magnetic, and optical properties similar to metals or semiconductors while retaining their flexibility, and ease of processing, and moreover, have good redox reversibility and the electrochromic properties. These properties are favorable to their applications in the electronic, physical, chemical, biochemical, and environmental protection fields. Research on conducting polymers is also closely related to the rapid development in nanofibers, nanowires, nanotubes [11-20] and molecular electronics [21]. The nanostructured conducting polymers have aroused considerable attention in their unique properties [22][23][24][25] and potential applications [26][27][28][29][30][31][32].

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Network films of conducting polymer-linked polyoxometalate-modified gold nanoparticles: Preparation and electrochemical characterization

Cited by 60 publications

References 36 publications

Transition metal ion-substituted polyoxometalates entrapped in polypyrrole as an electrochemical sensor for hydrogen peroxide

Transition metal ion-substituted polyoxometalates entrapped in polypyrrole as an electrochemical sensor for hydrogen peroxide

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

Electrocatalysis by Nanostructured Conducting Polymers

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