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Electrochemical response of nitrogen-doped multi-walled carbon nanotubes decorated with gold and iridium nanoparticles toward ferrocyanide/ferricyanide redox system |
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| Authors: | Tsierkezos Nikos G Puschner Max Ritter Uwe Knauer Andrea Hafermann Lars Köhler J Michael |
| Institution: | 1.Department of Chemistry, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, Ilmenau, Germany ;2.Department of Physical Chemistry and Micro Reaction Technology, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, Ilmenau, Germany ; |
| Abstract: | Novel composite films consisting of nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were fabricated by means of chemical vapor deposition technique and decorated with gold (AuNP) and iridium (IrNP) nanoparticles possessing diameters of 12.5 and 2.7 nm, respectively. The electrochemical responses of fabricated composite films, further denoted as N-MWCNTs/MNPs (M: Au and Ir), toward ferrocyanide/ferricyanide, Fe(CN)6]3−/4− redox couple was probed by means of cyclic voltammetry and electrochemical impedance spectroscopy techniques. The findings demonstrate that both N-MWCNT/MNP composite films exhibit greater electrochemical response and sensitivity toward Fe(CN)6]3−/4− compared to unmodified N-MWCNTs. The results verify that the N-MWCNT/MNP composite films are extremely promising for application in electrochemical sensing. |
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