Methanol electrooxidation on carbon paste electrode modified by nickel ions dispersed into poly (2,5-Dimethylaniline)

Quantitative determination of methanol, is of great interest in food, fermentation and wine industries as well as in clinical chemistry. Methanol is one of the interesting future fuels for fuel cell application. Compared with other cells, the direct methanol fuel cell (DMFC) has several advantages such as high efficiency, very low polluting emissions, a potentially renewable fuel source and fast and convenient refueling. On the other hand, the slow kinetics of methanol is one of the unsolved problems in the development of DMFCs and represents a serious impediment in the use of electrochemical methods, based on the direct oxidation of this molecule on the electrode, with analytical purposes. Thus, a large number of investigations have been carried out to diminish the typically large overpotentials encountered in the direct oxidation of methanol at most unmodified electrode surfaces or at chemically modified electrodes.