Effect of the vapor-deposited Au nanoparticles on the rate of the redox reaction at the highly oriented pyrolytic graphite electrode

Bastl, Zdeněk; Franc, Jiří; Janda, Pavel; Pelouchová, Hana; Samec, Zdeněk

doi:10.1016/j.jelechem.2007.03.003

Cited by 4 publications

(4 citation statements)

References 51 publications

(83 reference statements)

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“…With respect to the spatial discontinuity of the anhydrous corrosion layer in the form of the crosslinked dispersion phase, as follows from the micrograph in Fig. 2 [12,13], the abundance of both disperse components within the gel was expressed by their relative volumes, which respect the structural similarity of xerogel according to water sorption. The total desorbed amount of water (WD1) according to (DES1), expressed as a relative volume fraction of the disperse medium in the layer, is very similar in all samples, about 50 vol.%, as well as the volume fraction of zirconium dioxide as the disperse phase.…”

Section: Resultsmentioning

confidence: 99%

Gel structure of the corrosion layer on cladding pipes of nuclear fuel

Medek

Weishauptová

2009

Journal of Nuclear Materials

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Section: Resultsmentioning

confidence: 99%

Gel structure of the corrosion layer on cladding pipes of nuclear fuel

Medek

Weishauptová

2009

Journal of Nuclear Materials

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“…[12][13][14][15][16] In the family of the nanostructures, gold nanoparticles (Au NPs) are especially attractive due to their relatively easy synthesis in various shapes and sizes, their long-term stability, and their unique physicochemical properties. [12][13][14][15][16][17][18][19][20] Au NPs can be used for modifying various metallic and nonmetallic surfaces, while showing impressive catalytic features. In this paper, we present a simple method for modifying graphite electrodes with gold nanoparticles that are stabilized with mercaptoundecanoic acid (Au-MUA NPs).…”

Section: Introductionmentioning

confidence: 99%

“…In the past few years, modification of solid electrodes with nanoparticles has attracted considerable interest. The nanoparticle-modified electrodes often display unusual physical and catalytic properties, finding huge applicability in the fields of biosensors, medicine, pharmacy, electrocatalysis, and so on. , From this point of view, the modification of the graphite electrodes with various nanostructures also represents an important research field. − In the family of the nanostructures, gold nanoparticles (Au NPs) are especially attractive due to their relatively easy synthesis in various shapes and sizes, their long-term stability, and their unique physicochemical properties. − Au NPs can be used for modifying various metallic and nonmetallic surfaces, while showing impressive catalytic features. In this paper, we present a simple method for modifying graphite electrodes with gold nanoparticles that are stabilized with mercaptoundecanoic acid (Au-MUA NPs).…”

Section: Introductionmentioning

confidence: 99%

Probing of the Voltammetric Features of Graphite Electrodes Modified with Mercaptoundecanoic Acid Stabilized Gold Nanoparticles

et al. 2008

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In this work we report on the remarkable voltammetric features of graphite electrodes, which were modified with mercaptoundecanoic acid derivatized gold nanoparticles (Au-MUA NPs) by simple adsorption from basic aqueous solution. Atomic force microscopy measurements proved a fairly uniform adsorption of the nanoparticles in the form of clusters, and consecutive island formation. The electrochemical features of the modified electrodes were probed by cyclic voltammetry, while using various redox probes in several different setups. The catalytic effects of the adsorbed clusters on the graphite electrodes proved to be highly reproducible, time dependent, and of nonselective nature. The main advantages of the proposed methodology are seen by the simplicity of the modification procedure, the stability of the self-assembled gold nanoparticle film, their applicability in various voltammetric scenarios, and the potential employment of the Au-MUA NP modified electrodes as sensors for various systems.

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“…It has been reported that decoration of edge steps of HOPG surfaces with Au nanoparticles enhances the electron transfer of Fe(CN) 6 3-species. 41 The existence of two different domains on HOPG surfaces may results in a relative large effect on electron transfer features by modification of SiMo12O40 4-compared with GC and Au surfaces.…”

mentioning

confidence: 99%

Heterogeneous Electron Transfer at Polyoxometalate-modified Electrode Surfaces

Choi¹,

Seo²,

Kim

2010

Bulletin of the Korean Chemical Society

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The heterogeneous electron transfer at SiMo12O40 4-monolayers on GC, HOPG, and Au electrode surfaces are investigated using cyclic voltammetric and electrochemical impedance spectroscopic (EIS) methods. The electron transfer of negatively charged Fe(CN)6 3-species is retarded at SiMo12O40 4--modified electrode surfaces, while that of positively charged Ru(NH3)6 3+ species is accelerated at the modified surfaces. This is due to the electrostatic interactions between SiMo12O40 4-layers on surfaces and charged redox species. The electron transfer kinetics of a neutral redox species, 1,1'-ferrocenedimethanol (FDM), is not affected by the modification of electrode surfaces with SiMo12O40 4-, indicating the SiMo12O40 4-monolayers do not impart barriers to electron transfer of neutral redox species. This is different from the case of thiolate SAMs which always add barriers to electron transfer. The effect of SiMo12O40 4-layers on the electron transfer of charged redox species is dependent on the kind of electrodes, where HOPG surfaces exhibit marked effects. Possible mechanisms responsible for different electron transfer behaviors at SiMo12O40 4-layers are proposed.

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Effect of the vapor-deposited Au nanoparticles on the rate of the redox reaction at the highly oriented pyrolytic graphite electrode

Cited by 4 publications

References 51 publications

Gel structure of the corrosion layer on cladding pipes of nuclear fuel

Gel structure of the corrosion layer on cladding pipes of nuclear fuel

Probing of the Voltammetric Features of Graphite Electrodes Modified with Mercaptoundecanoic Acid Stabilized Gold Nanoparticles

Heterogeneous Electron Transfer at Polyoxometalate-modified Electrode Surfaces

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