Simulation of voltammogram on rough electrode

Zuo, Xiaobing; Xu, Changsen; Xin, Houwen

doi:10.1016/s0013-4686(96)00448-3

Cited by 27 publications

(19 citation statements)

References 13 publications

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“…Particularly in the case of nanomaterials such as carbon nanotubes and graphenes, porosity can result in possible occurrences of thin-layer diffusion and/or adsorption effects [1,10,11,14,[20][21][22] due to internal pore structures and the concomitant surface area increase [23]. However, there also remains uncertainty over the general extent to which porosity (as an extrinsic property) can influence experimental data, and which may consequently result in erroneous interpretations of apparent enhancements arising from intrinsic material properties.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Intrinsic electrochemical performance and precise control of surface porosity of graphene-modified electrodes using the drop-casting technique

Eng

Chua

Pumera

2015

Electrochemistry Communications

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Section: Accepted Manuscriptmentioning

confidence: 99%

Intrinsic electrochemical performance and precise control of surface porosity of graphene-modified electrodes using the drop-casting technique

Eng

Chua

Pumera

2015

Electrochemistry Communications

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“…The oxidation/reduction of an equimolar electroactive couple, potassium ferrocyanide and potassium ferricyanide, exhibits a reversible redox reaction with diffusion-limited kinetics in both electrodes but with increased current densities for NSG than flat gold electrodes (Fig. 3b) This is caused by the morphology of the surface of the electrode, accounting for both the roughness 27,28 and porosity 29 , which could enhance the apparent electrode kinetics and depend on the cumulative pore volume and size 30 . At slow scan rates and in longer time-scale experiments, the electrode kinetics are governed by larger diffusion layers.…”

Section: Electrochemical and Antifouling Properties Of Nsgmentioning

confidence: 99%

SEEDING to enable sensitive electrochemical detection of biomarkers in undiluted biological samples

Río¹,

Woo²,

Park³

et al. 2021

Preprint

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The interface between an electrode and a liquid plays a critical role in the overall performance of electrochemical biosensors. Surface morphology and roughness affect key parameters, such as the active area, diffusion profiles, and apparent electron transfer kinetics, whereas porosity may hinder the diffusion of fouling proteins. However, there is no simple and rapid method compatible with photolithographic electrodes to generate both nanostructured and porous surfaces. Herein, we demonstrate the interplay between the preferential etching of chloride and surfactant-assisted anisotropic gold reduction to create homogeneous, nanostructured, and nanoporous substrates on photolithographic gold electrodes within a minute and without using templates. We coined this process, SEEDING, that is, Surfactant-based Electrochemical Etch-Deposit Interplay for Nanostructure/Nanopore Growth. SEEDING on electrodes enhanced the sensitivity and anti-biofouling capabilities, enabling direct analysis of small molecules, proteins, and cancer-derived extracellular vesicles in complex biological fluids such as undiluted plasma and urine samples.

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“…According to known literature the potential of UPD-peaks resulting from deposits at low fractional coverage (q 0.1) are independent of the concentration. However, since several complex factors influence on the under potential deposition like crystal-structure etc., deviations often occur [38,39].…”

Section: Differential Pulse Anodic Stripping Voltammetry (Dpasv) Of Mmentioning

confidence: 99%

Electrochemical Properties and Application of Mixed Silver‐Bismuth Electrodes

2005

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Electrochemical properties of silver electrodes with 2, 4, 6, 10 and 15% bismuth have systematically been investigated with cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Increased overpotential towards hydrogen evolution reaction (HER) was found as a result of increasing amount of added bismuth. This was also demonstrated in acid solution where zinc was successfully detected on mixed electrodes, but failed on pure silver electrodes. Formation and decomposition of oxide products formed on the different electrode surfaces were studied by cyclic voltammetry, and in addition to known species found on sliver, also peaks attributed to bismuth were achieved and examined. Zinc, cadmium, and lead were measured in the low mg/L range on the mixed electrodes, and good linearity (r 2 ¼ 0.998) was found for 2 to 10 mg/L. Lead was measured down to 0.1 mg/L. Further it was found in DPASV that the zinc peak significantly shifted towards a more negative value with increasing amount of bismuth in the silver electrodes. The same was also observed for cadmium and lead, but in a less extent. Finally a silver electrode containing 15% bismuth was used for continuous analyses in a polluted river for 6 weeks.

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Simulation of voltammogram on rough electrode

Cited by 27 publications

References 13 publications

Intrinsic electrochemical performance and precise control of surface porosity of graphene-modified electrodes using the drop-casting technique

Intrinsic electrochemical performance and precise control of surface porosity of graphene-modified electrodes using the drop-casting technique

SEEDING to enable sensitive electrochemical detection of biomarkers in undiluted biological samples

Electrochemical Properties and Application of Mixed Silver‐Bismuth Electrodes

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