Anodic Dissolution of Titanium Oxycarbide TiCxO₁₋x with Different O/C Ratio

The performance of TiCxO1-x solid solutions with different O/C ratio serving as the anode in electrolysis cell was investigated in NaCl-KCl molten salt. It was found that the electrochemical dissolution occurs from the same potential for all the TiCxO1-x. The valance of the dissolved titanium ion depends on the potential applied. Both the dissolution ratio of titanium and the by-product of the anode reaction are dependent on the composition of the anode TiCxO1-x. For high carbon TiCxO1-x (x>0.5), all the titanium in TiCxO1-x dissolves as titanium ions with carbon monoxide (CO) and carbon (C) as the by-products. For low carbon TiCxO1-x (x<0.5), carbon monoxide and carbon dioxide (CO2) were detected in anodic gas, titanium partially dissolves as titanium ion and the remaining forms Ti2O3. The dissolution ratio of titanium decreases with the increase of oxygen in TiCxO1-x.