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Prussian Blue‐Modified Titanate Nanotubes: A Novel Nanostructured Catalyst for Electrochemical Reduction of Hydrogen Peroxide
Author(s) -
Iveković Damir,
Gajović Andreja,
Čeh Miran,
Pihlar Boris
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200900622
Subject(s) - prussian blue , catalysis , hydrogen peroxide , electrochemistry , inorganic chemistry , materials science , nuclear chemistry , reaction rate constant , electrode , chemistry , kinetics , organic chemistry , physics , quantum mechanics
Prussian blue (PB) modified titanate nanotubes (PB‐TiNT) have been synthesized by the reaction of Fe 2+ ‐modified TiNT with hexacyanoferrate(III) ions. The rate constant for heterogeneous catalytic reaction between PB‐TiNT and H 2 O 2 was found to be k =2×10 4 dm 3 mol −1 s −1 , which is an order of magnitude higher than the values of k reported for conventionally prepared, electrochemically deposited PB films. On the PB‐TiNT modified electrode with subnanomolar surface concentration of PB ( Γ (PB)=2.8×10 −11 mol/cm 2 ), a stable, reproducible and linear response towards H 2 O 2 was obtained in the concentration range 0.02–4 mM, with the sensitivity of 0.10 AM −1 cm −2 at −150 mV.