Network electrocatalytic films of conducting polymer-linked polyoxometallate-stabilized platinum nanoparticles

Kulesza, Paweł J.; Karnicka, Katarzyna; Miecznikowski, Krzysztof; Chojak, Małgorzata; Kolary, Aneta; Barczuk, Piotr J.; Tsirlina, Galina A.; Czerwiński, Wojciech

doi:10.1016/j.electacta.2005.03.061

Cited by 56 publications

(37 citation statements)

References 49 publications

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“…The procedure was consistent with the view that controlled amounts of phosphomolybdate-stabilized gold nanoparticles were introduced during alternate immersions. In view of the literature reports [20][21][22][23][24][25][26][27], three sets of highly reversible peaks (Fig. 1a) shall be interpreted in terms of the consecutive two-electron reactions leading to the formation of partially reduced heteropoly blue phosphomolybdates according to the Eq.…”

Section: Resultsmentioning

confidence: 99%

“…Three-dimensional multilayer films composed of six layers of PMo 12 -stabilized gold nanostructures and five ultra-thin layers polypyrrole (6PMo 12 -Au NPs/5PPy) were fabricated using the layer-by-layer method according to the procedure described earlier [17,24,25]. First, the glassy carbon electrode was exposed to the colloidal solution of PMo 12 -protected gold (Au-PMo 12 ) particles for 30 min followed by rinsing with water.…”

Section: Methodsmentioning

confidence: 99%

“…Another promising approach involved admixing Pt nanoparticles with the phosphododecamolybdate or phosphododecatungstate cesium salt which acted as co-catalyst, providing a proton-rich environment in the vicinity of the Pt centers [15,16]. Fabrication of three-dimensional (layer-by-layer) arrangements composed sequentially of ultra-thin layers of phosphotungstate-protected platinum nanoparticles and polyaniline to produce highly reactive catalysts toward oxygen reduction [17] should also be mentioned here.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of oxygen reduction at Co-porphyrin catalyst by supporting onto hybrid multi-layered film of polypyrrole and polyoxometalate-modified gold nanoparticles

Żołądek

Rutkowska

Blicharska

et al. 2016

J Solid State Electrochem

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Three-dimensional multi-layered films (on glassy carbon) composed of networks of polyoxometallate (PMo 12 O 40 3− )-modified gold nanoparticles linked together through the alternately deposited ultra-thin layers of polypyrrole have served as active supports for Co-porphyrin catalytic centers. The hybrid organic-inorganic films (supports) have been prepared by using the layer-by-layer approach. The fact that polyanionic (phosphomolybdate) adsorbates on gold nanoparticles are attracted by positively charged sites of conducting polymer (polypyrrole) structures leads to the stabilizing effect and facilitates distribution of Au nanostructures. The systems have been characterized using scanning electron microscopy, as well as with chronoamperometric and voltammetric techniques. By supporting Co-porphyrin centers o n t o t h e h y b r i d f i l m o f t h e p o l y m e r -l i n k e d phosphomolybdate-stabilized gold nanoparticles, significant electrocatalytic enhancement effects (namely voltammetric current increases) have been observed during the electroreduction of oxygen in acid medium relative to a standard response of the simple porphyrin deposit on glassy carbon measured under analogous conditions. Among important issues is the high activity of the hybrid film (support) itself toward the reductive decomposition of hydrogen peroxide to water. When it comes to performance of the Co-porphyrincontaining system, it is reasonable to expect that the O 2 reduction process is initiated at Co-porphyrin catalytic sites (twoelectron reduction to H 2 O 2 ) and continued (two-electron reduction to H 2 O) at the hybrid film containing gold nanoparticles dispersed within the highly porous cauliflower-like structures of polypyrrole multi-layers. While the gold networks facilitate charge distribution within the hybrid electrocatalytic film, non-covalent π-π interactions of porphyrin rings with polypyrrole interlayers and charge transfers between negatively charged (PMo 12 O 40 3− modified) gold nanoparticles and positively charged nitrogen sites of polypyrrole could also cause synergism.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhancement of oxygen reduction at Co-porphyrin catalyst by supporting onto hybrid multi-layered film of polypyrrole and polyoxometalate-modified gold nanoparticles

Żołądek

Rutkowska

Blicharska

et al. 2016

J Solid State Electrochem

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“…The materials used for solid-state voltammetry should contain not only reactive redox species, through which fast reversible electron transfer is possible, but also fairly large amounts of mobile counter cations to keep the electroneutrality. Such materials can have potential application as charge storage in batteries and supercapacitors [3], electrochromic devices [4], corrosion protection [5,6], medicine [7], and fuel cell research [7][8][9][10][11][12][13][14][15]. The important physicochemical parameters, such as porosity, degree and type of solvation, effective diffusion coefficient of charge propagation, concentration of redox species, should be taken into account during evaluation and selection of solid electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Adamczyk

Miecznikowski

2013

J Solid State Electrochem

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We demonstrate the electrochemical characteristics of the, poorly described in the literature, mixed-valence proton conducting solid borotungstic acid single crystal, H 5 BW 12 O 40 xH 2 O, in the absence of liquid electrolyte phase. We performed electrochemical measurements in an all-solid cell with a gold fiber ultramicrodisk (diameter 10, 25, and 40 μm) working electrode, a silver semi-reference disk electrode, and a glassy carbon ring counter electrode. Diagnostic experiments at different scan rates aimed at probing the model of mass transport and potential kinetic limitations. Such bulk parameters as the effective diffusion coefficient of charge propagation and the concentration of mixed-valence redox centers were determined by two methods. The first method is based on the analysis of both Cottrellian and steady-state currents (the mixed-regimes method), and the second method provides the true diffusion coefficient (transport coefficient free of the migration influence) for both the substrate and the product of the electrode reaction. Together, these methods constitute a double potential step chronoamperometry experiment. The data obtained with these electrochemical experiments (effective diffusion coefficients, concentration of mixed-valence redox centers, etc.) can support the results obtained with other techniques (XRD, FTIR, and TGA).

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“…In particular, it was reported that modification of PtSn or PtRu catalytic nanoaprticles with ultra-thin layers of PMo 12 led to the enhancement of their activities during oxidation of ethanol [23]. To fabricate novel multifunctional composite catalytic nanostructures material with even more pronounced electrocatalytic properties towards electrooxidation of ethanol, we combine here advantages coming from the modification of Ptbased nanoparticles with polyoxometallates [24][25][26] with a unique concept of the synthesis of nanoparticles on the polymer-functionalized MWCNTs [17]. Our electrochemical studies are supported with transmission electron microscopic investigations and high resolution XPS measurements.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Activity of PtRu Nanoparticles Towards Oxidation of Ethanol by Supporting on Poly(diallyldimethylammonium)-Functionalized Carbon Nanotubes and Modification with Phosphomolybdate

et al. 2010

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A new concept of fabrication, immobilization, and distribution of bimetallic PtRu nanoparticles leading to enhancement of the electrocatalytic oxidation of ethanol is proposed. The approach utilizes poly (diallyldimethylammonium chloride), PDDA, to functionalize multi-walled carbon nanotubes (MWCNTs) and to produce a novel support for synthesized PtRu nanoparticles as well as further modification of the catalytic surfaces with ultra-thin layers of phosphododecamolybdate (PMo 12 O 40 3− ). Remarkable increases of electrocatalytic currents measured under voltammetric and chronoamperometric conditions have been observed.Parallel experiments performed with use of commercial PtRu nanoparticles confirm existence of enhancement effects originating from application of PDDA-modified MWCNTs and phosphomolybdate.

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Network electrocatalytic films of conducting polymer-linked polyoxometallate-stabilized platinum nanoparticles

Cited by 56 publications

References 49 publications

Enhancement of oxygen reduction at Co-porphyrin catalyst by supporting onto hybrid multi-layered film of polypyrrole and polyoxometalate-modified gold nanoparticles

Enhancement of oxygen reduction at Co-porphyrin catalyst by supporting onto hybrid multi-layered film of polypyrrole and polyoxometalate-modified gold nanoparticles

Solid-state electrochemical behavior of Keggin-type borotungstic acid single crystal

Enhancement of Activity of PtRu Nanoparticles Towards Oxidation of Ethanol by Supporting on Poly(diallyldimethylammonium)-Functionalized Carbon Nanotubes and Modification with Phosphomolybdate

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