The effect of electrocatalytic nanoparticle injection on the electrochemical response at a rotating disc electrode

Dolinska, Joanna; Jönsson-Niedziółka, Martin; Sashuk, Volodymyr; Opałło, Marcin

doi:10.1016/j.elecom.2013.10.021

Cited by 19 publications

(12 citation statements)

References 28 publications

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“…Au [8], Pt [9], TiO2 [3] and IrO2 [10] have been extensively investigated to better understand electrocatalytic reaction mechanisms [11,12]. Recently, AuNP suspensions were reported for the ensemble electrocatalytic oxidation of glucose at rotating disc electrodes [13]. In these reports, the nanoparticles are generally prepared by chemical approaches, which inevitably involve nanoparticle surface modification.…”

Section: Introductionmentioning

confidence: 99%

Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Liu

Austen

Cornwell

et al. 2017

Electrochemistry Communications

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We report the electrochemistry of gold nanoparticles (AuNPs), prepared by Laser Ablation Synthesis in Solution (LASiS), via the electrocatalytic oxidation of glucose upon single nanoparticle collisions at inert microelectrodes. Spherical AuNPs with diameters in the range 20-30 nm, as determined by transmission electron microscopy, were synthesized by LASiS of a gold plate immersed in water. Nanoparticle collisions were electrochemically detected through the AuNP-catalysed oxidation of glucose at carbon fiber microelectrodes in alkaline solution, enabling the electrocatalytic detection of single AuNPs. This approach provides a basis for detecting and understanding the electrocatalytic properties of pristine nanoparticles in aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Liu

Austen

Cornwell

et al. 2017

Electrochemistry Communications

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“…Recently, we and others demonstrated that it is possible to record the amperometric response of the catalytic nanoparticles from the background current on standard size disc electrodes (diameter in the range of millimetres) in forced convection conditions. This was done in both flow system and with rotating disc electrode . It was concluded, that adsorption of catalytic nanoparticles provides suitable conditions for discrimination of the faradaic from capacitive current.…”

Section: Introductionmentioning

confidence: 77%

Electrochemical Detection of Positively Charged Carbon Nanoparticles Suspension in Flow

et al. 2018

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The electrochemical behaviour of suspended nanoparticles received some attention recently. Very few studies are performed in the flow system. Here, we have demonstrated that injection of positively charged (with ammonium functionalities) carbon nanoparticles suspension to flowing ascorbic acid solution significantly enhances its chronoamperometric response and can be used for these nanoparticles detection. This is because of electrocatalytic properties of these nanoparticles towards ascorbic acid electrooxidation. The magnitude of the signal depends on the type of flow system and is larger than in the case of suspension of negatively charged nanoparticles. It is also proportional to the concentration of nanoparticles. Their adsorption on the electrode surface plays the crucial role in the electrode process.

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“…This results in current increase. Such phenomenon was demonstrated on the example of electrocatalytic oxidation of glucose in AuNPs suspension at glassy carbon rotating disc electrode . Nevertheless, the recorded current resulted rather from adsorption than collisions of nanoparticles on the electrode surface.…”

Section: Introductionmentioning

confidence: 92%

“…Although the electrochemical studies of AuNPs films were extensive , , there are only few examples of electrochemical research of AuNPs suspensions . On the basis of earlier studies one can conclude that the electrochemical analysis of gold nanoparticles suspensions can be based on either their electrodissolution or electrocatalytic behaviour .…”

Section: Introductionmentioning

confidence: 99%

Continuous Electrochemical Detection of Gold Nanoparticles in Flow

et al. 2017

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Nanoparticles have already found numerous applications and their global production is still increasing. Therefore, the engineered nanoobjects of uncertain toxicity become ubiquitous in the environment and a continuous monitoring of their presence is highly desirable. Here, we demonstrate a continuous electrochemical detection of gold nanoparticles (AuNPs) based on synchronous processes of their electrodissolution and electrocatalysis. This approach is realized by the injection of nanoparticles suspension into the Flow Injection Analysis (FIA) system. The modular structure of FIA system is particularly applicable for carrying out of sequential operations: AuNPs passivation, oxidation of aqueous SO2 and gold. It enables continuous, fast and reproducible gold nanoparticles determination in a wide concentration range: 10−10– 10−7 mol nanoobjects L−1.

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The effect of electrocatalytic nanoparticle injection on the electrochemical response at a rotating disc electrode

Cited by 19 publications

References 28 publications

Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Collisional electrochemistry of laser-ablated gold nanoparticles by electrocatalytic oxidation of glucose

Electrochemical Detection of Positively Charged Carbon Nanoparticles Suspension in Flow

Continuous Electrochemical Detection of Gold Nanoparticles in Flow

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