Département de chimie moléculaire

The authors report on a novel approach for open-circuit (current-free) deposition of Prussian blue. Synthesis of Prussian blue was carried out by redn. of ferric ferricyanide with org. mols., which are known to form polymers upon oxidn. The proposed interfacial deposition is a result of the synthesis in the presence of electrode support due to preconcn. of precursors at the interface. The resulting modified electrodes displayed the dramatically improved operational stability in H2O2 continuous monitoring with no loss of either electrochem. or anal. performance characteristics compared to electrodes with electrochem. deposited Prussian blue. The shown possibility to deposit stable films with regular structure in the absence of any external voltage could open new horizons for sensor science. [on SciFinder(R)]