Influence of anodic oxidation of glassy carbon surface on voltammetric behavior of Nafion®-coated glassy carbon electrodes

Maruyama, Jun; Abe, Ikuo

doi:10.1016/s0013-4686(01)00539-4

Cited by 68 publications

(61 citation statements)

References 19 publications

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“…2,31,32 The accumulation of cations combined with barrier properties have been utilised for the detection of the neurotransmitter dopamine in the presence of ascorbic acid. [33][34][35][36][37][38][39][40][41] Nafion films have been employed on electrodes as drop-cast films, 42,43 and by layer-by-layer deposition methodologies including the Langmuir-Blodgett 44,45 and Langmuir-Schaefer 25,[46][47][48] techniques. These techniques have facilitated the co-deposition of Nafion, with a redox mediator pre-loaded within the film 29,30 or with nano-materials immobilized within the film.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

Snowden

Edwards

Rudd

et al. 2013

Phys. Chem. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

Snowden

Edwards

Rudd

et al. 2013

Phys. Chem. Chem. Phys.

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“…In addition the oxidation at this potential is limited to charges that are slightly more than previously reduced oxide layer indicating a reversible redox couple, shown to be a quinone-hydroquinone transition. 28,29,31 With the formation of oxide species on the surface of the GC, there is the potential for the improvement of the interactions between substrate and deposit, leading eventually to increased background reaction rate. 29,34 Due primarily to the improved interactions between substrate and growing metal, EO has been investigated for improvement of different layers adhesion to GC for more than two decades.…”

Section: Npg Based Catalyst On Glassy Carbon (Gc)mentioning

confidence: 99%

“…27,28 Typically, EO involves an anodic activation in an aqueous electrolyte at a quite positive potential, and during this process GC is oxidized. 26,29 This terminates the GC surface with an oxidized layer that grows thicker into the material with increased anodic exposure. This whole process is controllable, allowing certain thicknesses of oxide to be achieved under given oxidation conditions.…”

mentioning

confidence: 99%

Enhanced Adhesion of Ultrathin Nanoporous Au Deposits by Electrochemical Oxidation of Glassy Carbon

Xia

Rooney

Ambrozik

et al. 2015

J. Electrochem. Soc.

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Electrochemical (EO) and Thermochemical (TO) oxidation have been considered as means for improved adhesion of metals to glassy carbon (GC) substrates. This paper is aimed at studying the effect of EO on the all-electrochemical processing of nanoporous gold (NPG) catalysts with emphasis on their adhesion to a GC substrate. It has been shown by two independent assessment approaches that EO improves twice the amount of retained NPG on GC helping to keep about 90% originally existing material after a two-hour rotation disk electrode test at 1600 rpm. This work also demonstrates that EO modifies the GC in a way making it more passive in the alloy deposition and subsequent dealloying processes. This effect results in a progressive nucleation density decrease with the depth of oxidation which in turn leads to a lack of continuity of the NPG layer. This trend is also accompanied by a decrease in deposition efficiency as a substantial part of the cathodic current is spent on the reduction of the pre-oxidized GC surface. Our study identifies the best outcome of the trade-off scenario between nucleation density, deposition efficiency and adhesion strength to be associated with depth of oxidation in the range 0.10 to 0.25 μm. NPG based catalyst on glassy carbon (GC).-Nanoporous Au (NPG) is a nano-material with three dimensional (3D) continuous structure featuring Au with interconnected nano-sized pores and ligaments.1 NPG and other nanoporous metals have been intensively investigated in recent years. This conductive material has an open, 3D porous framework with surface areas that even in an ultrathin NPG layer configuration could be an order of magnitude larger than the area of planar Au. Besides its continuous crystal lattice throughout the porous network, it has a pore size that is adjustable via simple thermal post-processing, which makes it potentially applicable in various fields such as electro-and gas-phase catalysis, optics, sensors and actuators. [2][3][4][5] It is known that nanoparticulate gold possesses remarkable catalytic activity toward oxidation reactions, should the particles be well supported and smaller than 5 nmin size. 6 Recently, ultrathin films of NPG have been shown to serve as catalysts for fuel cell applications as an alternative to their nanoparticle (NP) counterparts.7-9 These films are generated electrochemically under precise potential/current control, which minimizes material loss and surface contamination over the multi-step NP synthetic routines. 7,10 Compared to nanoparticle synthesis which often lacks control due to the large number of the processing steps, ultra thin films of NPG are cost effective, simple to fabricate, and show better reproducibility in terms of quality and reactivity. Another advantage of NPG films is that the edge effect that lowers the catalytic activity characteristic for NP based catalysts does not exist in NPG films due to its continuous nature. 11In our previous work, we established an all-electrochemical synthetic method for a NPG-based catalyst that maximized t...

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“…Despite the considerable number of articles [1][2][3][4][5] dealing with the impacts of electrochemical pretreatment of glassy carbon (GC) electrode on the structural and electrocatalytic activity of deposited catalysts particles, the study of such impacts prior to nickel electrode position considered to be scarce [6]. For instance, oxidation of GC is known to enhance its electrocatalytic properties towards many applications such as electrochemical oxidation of many organic molecules [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Anodic Pretreatment of Glassy Carbon: Impacts on Structural and Electrochemical Characteristics of Niox Nanoparticles

Saleh¹

2017

IJBSBE

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Usually, glassy carbon electrode (GC) is used as it is as a substrate for electrochemically deposited nickel or nickel oxide (NiO x ) nanoparticles. In the present study, GC carbon is anodically oxidized in different media prior to electrode position of NiO x and the impacts of this pretreatment on the structural and electrochemical characteristics of NiO x are studied. Upon anodic pretreatment of GC electrode in acid (0.1 M H 2 SO 4 , GC OX-AC ) and in alkali (0.1 M NaOH, GC OX-AL ), the structural and electrochemical characterizations of nickel oxide (NiO x ) nanoparticles are highly modified. Cyclic voltammetry (CV), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) are used for characterization of the electrodes. While NiOx nanoparticles deposited on GC OX-AC reveal a bird-like shape, it shows semi-spherical shape when it is deposited on either GC or GC OX-AL , with smaller size on the GC OX-AL . The reversibility of the Ni(OH) 2

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Influence of anodic oxidation of glassy carbon surface on voltammetric behavior of Nafion®-coated glassy carbon electrodes

Cited by 68 publications

References 19 publications

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

Intrinsic electrochemical activity of single walled carbon nanotube–Nafion assemblies

Enhanced Adhesion of Ultrathin Nanoporous Au Deposits by Electrochemical Oxidation of Glassy Carbon

Anodic Pretreatment of Glassy Carbon: Impacts on Structural and Electrochemical Characteristics of Niox Nanoparticles

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