Abstract
Vanadium(V) oxide and vanadium-titanium oxides supported on titanium were examined by electrochemical measurement, Raman spectroscopy, scanning electron microscopy and X-ray diffraction to assess their use for amperometric end point indication of complexometric titrations. The electrodes were prepared by coating titanium sheets or wires with mixed solutions of vanadium(V) and titanium(IV) and heating. The decomposition is accompanied by a phase transformation of the titanium dioxide from the anatase to the rutile lattice. The electrode has high activity for the electro-oxidation of ethylenediaminotetraacetic acid (EDTA) in alkaline buffered solution. It also performs better than other electrodes made by anodic deposition of transition metal oxides on platinum.
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