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Abstract
The electrocatalytic oxidation of formaldehyde on palladium nanoparticles electrodeposited on carbon ionic liquid electrode (Pd–CILE) has been investigated. The ionic liquid, octylpyridinum hexafluorophosphate ( [ C 8 Py + ] PF 6 - ) was incorporated in the electrode as the binder. The general electrochemical behavior was characterized by cyclic voltammetry in alkaline media. The results show that the Pd–CILE system exhibits a significant electrocatalytic activity towards oxidation of formaldehyde. An oxidation peak was obtained at a potential of ∼0.03 V vs. Ag/AgCl for 0.010 M formaldehyde. The interesting feature of this electrode is that its catalytic efficiency as well as its anti poisoning property are far superior compared to many of the previously reported formaldehyde sensors.
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