Controlled electrocatalysis by microperoxidase-11 and Au-nanoparticle superstructures on conductive supports

Fernando Patolsky, Tobias Gabriel, Itamar Willner

Research output: Contribution to journalArticlepeer-review

Abstract

Three-dimensional superstructures, multilayer-arrays consisting of Au-nanoparticles (13 ± 1 nm) and crosslinked by microperoxidase-11 (MP-11), were assembled on transparent ITO conductive glass supports. The structures of the assemblies were confirmed by spectroscopic and electrochemical analyses, which revealed that each Au-particle is associated with ca. 50 MP-11 molecules. The multilayered MP-11/Au-particle systems act as electrocatalysts for the reduction of H2O2. The number of MP-11 | Au-particle layers associated with the electrode controls the resulting electrocatalytic currents. The controllable number of MP-11 | Au-particle layers associated with the electrode enables the control of the effectiveness of the electrocatalytic process and tuning of the sensitivity of the H2O2-sensing interface.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume479
Issue number1
DOIs
StatePublished - 22 Dec 1999
Externally publishedYes

Keywords

  • Au-colloids
  • Electrocatalysis
  • Microperoxidase
  • Modified electrodes
  • Nanoparticles

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