Electrochemical fabrication of metallic nanostructured electrodes for electroanalytical applications

Plowman, Blake J.; Bhargava, Suresh K.; O’Mullane, Anthony P.

doi:10.1039/c1an15657h

Cited by 81 publications

(62 citation statements)

References 187 publications

(251 reference statements)

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“…8,24,25 It has been demonstrated that gold can be electrodeposited in a variety of forms including spheres, 26 prisms, 27 rods, 28 spikes, 29 flowers 30 and dendrites 31 and copper in the form of spherical nanoparticles, 32 cubes, 33 wires 34 and dendrites. 35 However, the co-deposition of copper and gold has received little attention.…”

Section: Introductionmentioning

confidence: 99%

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

et al. 2012

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The fabrication of nanostructured bimetallic materials through electrochemical routes offers the ability to control the composition and shape of the final material that can then be effectively applied as (electro)-catalysts. In this work a clean and transitory hydrogen bubble templating method is employed to generate porous Cu-Au materials with a highly anisotropic nanostructured interior. Significantly, the co-electrodeposition of copper and gold promotes the formation of a mixed bimetallic oxide surface which does not occur at the individually electrodeposited materials. Interestingly, the surface is dominated by Au(I) oxide species incorporated within a Cu(2)O matrix which is extremely effective for the industrially important (electro)-catalytic reduction of 4-nitrophenol. It is proposed that an aurophilic type of interaction takes place between both oxidized gold and copper species which stabilizes the surface against further oxidation and facilitates the binding of 4-nitrophenol to the surface and increases the rate of reaction. An added benefit is that very low gold loadings are required typically less than 2 wt% for a significant enhancement in performance to be observed. Therefore the ability to create a partially oxidized Cu-Au surface through a facile electrochemical route that uses a clean template consisting of only hydrogen bubbles should be of benefit for many more important reactions.

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Section: Introductionmentioning

confidence: 99%

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

et al. 2012

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“…Electrochemical techniques have attracted great interest in many cases, and these techniques can be fast in detection, less expensive, and with the merits of low detection limit and high accuracy as well as less complicated than the other techniques [1]. The most common and cheap electrode material used during electrochemical analysis is glassy carbon (GC); however, its use is very limited due to the fact that the oxidation of many organic/inorganic compounds occurs at very positive potentials, thus overlapping with the discharge of the background medium [2].…”

Section: Introductionmentioning

confidence: 99%

Cysteic Acid‐Modified Glassy Carbon Electrode for Monitoring Oxalic Acid (OA) Concentration During Its Electrochemical Oxidation at Ti/Pt Anode

et al. 2014

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The aim of this manuscript is to develop a combined method for the detection and elimination of oxalic acid (OA) in aqueous environment. For that, the surface of glassy carbon (GC) electrode has been modified by oxidation of L‐cysteine using cyclic voltammetric (CV) technique. After modification, the formation of a compact and uniform cysteic acid layer film was achieved and it was confirmed by surface analysis (scanning electron microscopy (SEM) and atomic force microscopy (AFM)). Estimation of the linear range, calibration function and limit of detection for OA were performed by differential pulse voltammetry using Cysteine‐modified electrode (Cysteine‐MGC). Due to its stability and sensitive response to OA, it was used for monitoring OA during its electrochemical oxidation at Ti/Pt anode. DPV analyses have been compared with classic titration method and HPLC achieving a good fit, confidence intervals and limits. The results are described and discussed in the light of the existing literature.

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“…The electrochemical behaviour of metallic nanoparticles has received significant attention due to their applicability as electrocatalysts for a variety of technologically important reactions, in particular, related to fuel cells and electrochemical sensing [1][2][3][4][5][6][7]. There are numerous approaches to creating nanoparticles; however, chemical synthesis is particularly attractive given the high degree of control that can be achieved over their size, shape and monodispersity [8].…”

Section: Introductionmentioning

confidence: 99%

Probing the surface oxidation of chemically synthesised gold nanospheres and nanorods

2014

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In this study, the electrochemical behaviour of commercially available gold spheres and rods stabilised by carboxylic acid and cetyl trimethyl ammonium bromide (CTAB) moieties, respectively, are investigated. The cyclic voltammetric behaviour in acidic electrolyte is distinctly different with the nanorods exhibiting unusual oxidative behaviour due to an electrodissolution process. The nanospheres exhibited responses typical of a highly defective surface which significantly impacted on electrocatalytic activity. A repetitive potential cycling cleaning procedure was also investigated which did not improve the activity of the nanorods and resulted in deactivating the gold spheres due to decreasing the level of surface defects.

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Electrochemical fabrication of metallic nanostructured electrodes for electroanalytical applications

Cited by 81 publications

References 187 publications

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

Cysteic Acid‐Modified Glassy Carbon Electrode for Monitoring Oxalic Acid (OA) Concentration During Its Electrochemical Oxidation at Ti/Pt Anode

Probing the surface oxidation of chemically synthesised gold nanospheres and nanorods

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