Nitrogen-doped multi-walled carbon nanotubes modified with platinum, palladium, rhodium and silver nanoparticles in electrochemical sensing

  • Nikos G. Tsierkezos
  • Shereen Haj Othman
  • Uwe Ritter
  • Lars Hafermann
  • Andrea Knauer
  • J. Michael Köhler
Research Paper

Abstract

Nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were fabricated by means of chemical vapour deposition technique and decorated with platinum (PtNPs), palladium (PdNPs), rhodium (RhNPs) and silver (AgNPs) nanoparticles possessing diameter 2.7, 2.6, 2.7 and 3.4 nm, respectively. The electrochemical responses of composite films, further denoted as N-MWCNTs/MNPs (M: Pt, Pd, Rh and Ag) towards ferrocyanide/ferricyanide, [Fe(CN)6]3−/4− were investigated in large concentration range (0.099–0.990 mM) in potassium chloride solution (1.0 M). The findings demonstrate that the electrochemical response and sensitivity of N-MWCNTs are improved significantly upon modification with metal nanoparticles. A strong dependence of film’s electrochemical fineness on type of metal nanoparticles used for modification can be observed. Namely, the current response, the charge-transfer kinetics, and the detection capability of novel composite films enhance with the following order: N-MWCNTs < N-MWCNTs/RhNPs < N-MWCNTs/PdNPs < N-MWCNTs/PtNPs < N-MWCNTs/AgNPs. The findings demonstrate that the novel N-MWCNTs/MNPs composite films can be considered as powerful and useful materials for electrochemical sensing.

Keywords

Electrochemical sensing Metal nanoparticles Multi-walled carbon nanotubes Palladium Platinum Rhodium Silver 

Supplementary material

11051_2014_2660_MOESM1_ESM.docx (745 kb)
Supplementary material 1 (DOCX 745 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Nikos G. Tsierkezos
    • 1
  • Shereen Haj Othman
    • 1
  • Uwe Ritter
    • 1
  • Lars Hafermann
    • 2
  • Andrea Knauer
    • 2
  • J. Michael Köhler
    • 2
  1. 1.Department of Chemistry, Institute of Chemistry and BiotechnologyIlmenau University of TechnologyIlmenauGermany
  2. 2.Department of Physical Chemistry and Micro Reaction Technology, Institute of Chemistry and BiotechnologyIlmenau University of TechnologyIlmenauGermany

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