Silver nanoparticles are synthesised employing the tannin method and deposited onto the screen-printed carbon electrode (SPCE) with a solvent evaporation process. Cyclic voltammetry allows the amount (or total surface area) for nanoparticle assemblies to be determined. The silver nanoparticle aggregates are catalytically active for the reduction of nitrate to nitrite^{1, 2} in aqueous 0.1 M NaOH. In order to investigate the efficiency and kinetics of the nanoparticle catalysed process, a hydrodynamic flow cell was designed and fabricated.

The flow cell allowed the reaction solution to be flowed across the SPCE and with the help of the Fe(CN)₆^4-/3- redox system the diffusion layer thickness was calibrated. In the generator–collector mode, efficiency of the product formation was calibrated. For the nitrate reduction, close to 100% current efficiency was determined and the diffusion-controlled reduction was observed with a sufficiently high amount of the catalyst.

[1] D. Kim, I. B. Goldberg, and J. W. Judy, Analyst 2007, 132, 350-357.

[2] J. Krista, M. Kopanica, and L. Novotny, Electroanalysis 2000, 12, 199-204.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/21818 must be provided.

1. Impedance Methods in Electrochemistry
2. Redox Reactivity of Methylene Blue in the Pores of UMCM-1 Metal-Organic Frameworks
3. Carbon Nanoparticle Surface Modification for Sensor Development
4. Ion Association Effects in Cellulose – Poly-(Diallyldimethylammonium) Reassembled Membranes Immersed in Acetonitrile
5. Conduction in Nanoparticle Assemblies and Mesoporous Films
6. Positively Charged Surface Functionalised Carbon Nanoparticles as Binding Sites for Redox Active Species
7. Triple Phase Boundary Photo-Voltammetry: Resolving Rhodamine B Reactivity in 4-(3-Phenylpropyl)-Pyridine Microdroplets
8. Carbon Dioxide Sensing Systems Based On Processes At Triple Phase Boundary Interfaces
9. Electrochemical behaviour of carbonised cellulose nanofibril films on the ITO electrode surface
10. MoSe₂ Substrates for the Electrodeposition of CISe Semiconductor Films
11. Determination of Dopamine in Presence of Ascorbate in Ultrathin Carbon Nanoparticle Composite Film Electrodes
12. Driving ion transfer across the toluene (trihexyl(tetradecyl)-phosphonium tris(pentafluoroethyl)trifluoro-phosphate) | water (electrolyte) interface with the MnTPP(III/II) redox system
13. Electrocatalytic Sulphite Detection at a Liquid-Liquid-Solid Three-Phase Boundary Electrode Sensors
14. Electrochemical Processes at Electrodes in Microwave Fields
15. Liquid-Liquid Ion-Transfer Electrochemistry at Stationary and at Flowing Triple Phase Boundaries
16. Microwave-assisted Capillary Electrophoresis with Electrochemical Detection
17. Analysis of Chlorobenzenes in Environmental Water Samples using Microwave-Assisted with Ionic-Liquids Liquid-Phase Microextraction
18. Electrochemical reactivity of proteins immobilised in mesoporous titania
19. New electrode surfaces for solid | liquid | liquid triple phase boundary electrochemistry
20. Ion transfer electrodes based on carbon nanofibers embedded in silicate film modified with room temperature ionic liquid
21. Nanoobjects embedded in silicate films for biphasic electrodes
22. Electrochemical Processes in Mesoporous TiO₂ Phytate Films