Direct electron transfer of myoglobin on CdO nanoparticles modified glassy carbon electrode

Mohammadi, N ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. Publisher: 2013
  3. Abstract:
  4. In this study, direct electron transfer of myoglobin (Mb) on cadmium oxide (CdO) nanoparticles modified glassy carbon electrode (GCE) was investigated. Prepared CdO nanoparticles were studied by X-Ray diffraction (XRD) and UV-visible absorption methods. All electrochemical studies were performed by cyclic voltammetry (CV) and a potentiostat device. The cyclic voltammogram of Mb/ CdO Nps/ GCE showed a couple of stable redox and oxidative peaks at -470 and -370 mV at scan rate of 50 mVs-1, respectively. The formal potential (Eo) of myoglobin was calculated as -(420 ± 3) mV. Direct electrode transfer led to design a biosensor for determination of hydrogen peroxide (H2O2). The sensor sensitivity was found in the range of 50 to 1150 μM of H2O2. Designed biosensor showed a good reproducibility and stability
  5. Keywords:
  6. Bioelectrochemistry ; Cadmium oxide (CdO) nanoparticles ; Glassy carbon electrode ; Myoglobin
  7. Source: International Journal of Electrochemical Science ; Volume 8, Issue 5 , 2013 , Pages 7345-7356 ; 14523981 (ISSN)
  8. URL: http://www.electrochemsci.org/papers/vol8/80507345.pdf