铁氰化镍/银复合无机膜修饰电极对肼的催化氧化作用

Electrocatalytic Oxidation of a Mixed Silver/Nickel Hexacyanoferrate Film Modified Electrode Toward Hydrazine

在含有Ag+、Ni2+的胶体混合溶液中,多次循环扫描在电极表面形成复合无机膜(Ag/NiCHF),此复合膜修饰电极对肼有显著的催化氧化作用。N2H4的浓度在5.0×10-6～6.0×10-3mol/L范围内与电流呈线性关系,检出限达到1.0×10-6mol/L。该电极已成功的用于水样中肼的测定。

The mixed inorganic silver and nickel hexacyanoferrate(Ag/NiCHF) film is deposited on a glassy carbon electrode by successively potential cycling in a colloidal mixed solution containing Ag+ and Ni2+. The Ag/NiCHF modified electrode has an excellent electrocatalytical ability to oxidize hydrazine. There is an excellent linearity between oxidation current and concentration of N2H4 in the range of 5.0×10-6～6.0×10-3 mol/L (r=0.998) with a detection limit of 1.0×10-6 mol/L. This method has been applied to the determination of N2H4 in samples.