This lecture will give an overview and discuss anode and cathode reactions based on multi-component films for oxygen and hydrogen peroxide reduction and fuel oxidation. Cathode reactions will cover those based on Co-porphyrin centers that are expected to induce reduction of oxygen at the initial stage, and the enzyme (horseradish or cabbage peroxidase) that should act as highly reactive catalyst capable of further reducing hydrogen peroxide intermediate [2]. The multi component bioelectrocatalytic film has also exhibited relatively higher activity towards reduction of hydrogen peroxide. Anode reactions will cover those based on mediated electron transfer. The presence of mediator is expected to facilitate an effective flow of electrons from the redox centers of glucose oxidase to the glassy carbon electrode.

We have also considered utilizing new enzymes to design, characterize and evaluate different types and distinct configurations of enzyme-based multi-component and well organized bioelectrocatalytic systems capable of effective oxidation of ethanol in neutral media. At all stages of investigations, comparison have been made to the behavior (under analogous conditions) of glucose with glucose oxidase as model enzyme [3]. A special attention have been paid to development of mediation and enzyme immobilization methodology for continuous and efficient electron transfer from the enzyme to the electrode surface.

On the whole, a stable multifunctional composite bio-electrocatalytic films for fuel oxidation and oxygen reduction under neutral conditions are produced. Finally, the formation, morphology, structural transformations and electrochemical properties of the MCNT-containing three-dimensional network films have been examined using cyclic voltammetry, potential step techniques, rotating disc voltammetry, FTIR spectroscopy and tranmission electron microscopy. The ability to create bioelectrocatalytic nanocomposites provides an opportunity to construct functional bioanodes and biocathodes. Follow on research will use the approach to design a biofuel cell system that utilizes an nanostructured enzyme-based anode and cathode working in tandem.

References:

[1] J.J. Gooding, R.Wibowo, J. Liu, W. Yang, D. Losic, S.Orbons, F.J. Mearns, J.G. Shapter, D.B. Ilibbert, J. Am. Chem. Soc., 125 (2003) 9006.

[2] B. Kowalewska, M. Skunik, K. Karnicka, K. Miecznikowski, M. Chojak, G. Ginalska, A. Belcarz, P. J. Kulesza, Electrochim. Acta, 53 (2008) 2408.

[3] B. Kowalewska, P.J. Kulesza, Electroanalysis, 21 (2009) 351.

• 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/22000 must be provided.

1. Development of multifunctional bioelectrocatalytic films for oxidation of ethanol   
2. Integrated carbon nanotube based mediating systems for bioelectrocatalysis: application to oxygen reduction and glucose oxidation
3. Preparation of copper hexacyanoferrate multilayer films modified with 4-(Pyrrole-1-yl) benzoic acid on glassy carbon electrode.
4. Development of electrocatalytic materials based on the mixed addenda Dawson heteropolyanion and conducting polymers
5. Oxidation of glucose at nanostructured composite bioelectrocatalytic systems
6. Application of Inorganic Redox - Conducting Solids As Charge Relays in Dye-Sensitized Solar Cell
7. Bi-functional electrocatalytic systems for oxygen reduction in acid medium
8. Incorporation of RuSe_x/C within nanostructural Ir matrices to enhance oxygen reduction
9. Electrochemical charging of carbon nanotubes modified with polyoxometallates monolayers
10. Enzymatic carbon nanotube based composite electrodes for dioxygen reduction
11. Multifunctional bio-electrocatalytic systems for reduction of oxygen and hydrogen peroxide
12. Electrocatalysis and Bioelectrocatalysis at Network Films of Metal Nanoparticles and Carbon Nanostructures
13. Bioelectrocatalytic dioxygen reduction at carbon nanotubes – silicate composite film modified electrode
14. Development and characterization of bioelectrocatalytic systems for oxygen reduction
15. Activation of Methanol-Tolerant Carbon-Supported RuSe_x Electrocatalytic Nanoparticles Towards More Efficient Oxygen Reduction
16. Electrocatalysis and bioelectrocatalysis and nanostructured composite films
17. New strategies in the electroctalytic reduction of oxygen for fuel and biofuel cells
18. Polyoxometallate-modified conducting polymer linked Pt nanoparticles as bifunctional electrocatalysts for bromate reduction
19. Network Films of Conducting Polymer Linked and Polymeatallate Stabilized Platinum Nanoparticles