Electrocatalytic Oxidation of Formaldehyde on Novel Composite of Nickel/triton-x100/poly(o-aminophenol-coaniline)

Oxidation of formaldehyde (hcho) is very important, due to its use in fuel cells. modification ofelectrodes surfaces is an excellent way to decrease the over potentials while to increase the currentdensity of the voltammetric response.pt as most efficient metal catalyst can easily be poisoned byproduct of oxidation at a high cost. in this work, an efficient and low cost electrocatalytic systemfor electrochemical oxidation of formaldehyde in alkaline solution is introduced. for preparation ofthis modified electrode, copolymeric film on the surface of carbon paste electrodewas formed bysuccessive potential cycling in solution containing o-aminophenol and aniline as monomer andtriton x-100 as a surfactant. ni(ii) ions were incorporated into the electrode surface by immersionof the copolymeric modified electrode in 0.1 m ni(ii) ion solution. the influences of differentparameters such as mol ratio of monomers in copolymer formation and the number of potentialcycling for copolymer formation on electrocatalytic ability of the modified electrode forformaldehyde oxidation have been investigated and optimized. results show that modifiedelectrode with copolymeric films, had a higher catalytic effect for formaldehyde oxidation withrespect to pure homopolymers (polyaniline or poly(o-aminophenol)). also addition of triton -x100in electropolymerization step, considerably increased catalytic ability of the modified electrode forformaldehyde oxidation. this modified electrode displays a highly efficient electrocatalytic activity toward oxidation of formaldehyde. the current density of 11 ma cm^-2 is greater than most of thepreviously reported electrodes.