Our method uses an electrochemical cleaning technique that disrupts and removes the native layer of titanium dioxide that exists on all titanium surfaces exposed to air, and by the use of a potassium amide as the electrolyte - this has the result of ensuring that only nitrogen-containing anions are attracted to the titanium anode.
Stefan Konietzny, Holger Fleischer, Simon Parsons, and Colin R. Pulham, J. Chem. Soc., Dalton Trans., 304-308 (2001): "Structural Characterisation of Dimethylgallium Tetrahydroborate and its Adducts with Diethyl Ether and Tetrahydrofuran". Lucy E. Griffiths, Martin R. Lee, Andrew R. Mount, Hiroshi Kondoh, Toshiaki Ohta, and Colin R. Pulham, Chem. Commun., 579-580 (2001): "Low temperature electrochemical synthesis of titanium nitride". P.A. McGregor, D.R. Allan, S. Parsons and C.R. Pulham, J.