Journal of Solid State Electrochemistry

, Volume 18, Issue 4, pp 965–973

Copper hexacyanoferrate modified electrodes for hydrogen peroxide detection as studied by X-ray absorption spectroscopy

  • Marco Giorgetti
  • Domenica Tonelli
  • Mario Berrettoni
  • Giuliana Aquilanti
  • Marco Minicucci
Original Paper

DOI: 10.1007/s10008-013-2343-5

Cite this article as:
Giorgetti, M., Tonelli, D., Berrettoni, M. et al. J Solid State Electrochem (2014) 18: 965. doi:10.1007/s10008-013-2343-5

Abstract

X-ray absorption spectroscopy (XAS) has been used to monitor the local geometry of Fe and Cu sites of copper hexacyanoferrates (CuHCF)-modified electrodes which find application in the electrochemical detection of hydrogen peroxide. The XAS approach has permitted to check the nature of the Cu and Fe sites and to investigate their local structure around about 500 pm from the metal centres. The measurements have been done on electrodes prior and after the addition of known quantities of hydrogen peroxide at two different concentration ranges, following a protocol consisting of H2O2 addition, applied potential, and rest period. For the CuHCF-modified electrode, this protocol leads to the increasing conversion to an already present “inactive” component, which limits the usability of the sensor; whereas the electrode modified with the Cu2+-loaded CuHCF displays a better resistance to this unavoidable process. In particular, the formation of the “inactive” component takes place more slowly, confirming the capability, at molecular scale, of such Cu-enriched CuHCF used as electrode modifier to detect more efficiently hydrogen peroxide, as recently demonstrated in our previous paper.

Keywords

X-ray absorption spectroscopy Hydrogen peroxide Copper hexacyanoferrate Graphite foil electrodes Sensor 

Supplementary material

10008_2013_2343_MOESM1_ESM.docx (653 kb)
Figs. S1–S5(XANES, EXAFS, LCF analysis, and CV) (DOCX 653 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Marco Giorgetti
    • 1
  • Domenica Tonelli
    • 1
  • Mario Berrettoni
    • 2
  • Giuliana Aquilanti
    • 3
  • Marco Minicucci
    • 4
  1. 1.Department of Industrial Chemistry “Toso Montanari”University of Bologna, INSTM, UdR BolognaBolognaItaly
  2. 2.Department of Industrial Chemistry “Toso Montanari,” UOs (unità operativa di sede) Campus di RIMINIUniversity of Bologna, INSTMBolognaItaly
  3. 3.Sincrotrone Trieste S.C.p.ATriesteItaly
  4. 4.CNISM, School of Science and Technology, Physics DivisionUniversity of CamerinoCamerinoItaly

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