Preparation of anodes for oxygen evolution by electrodeposition of composite oxides of Pb and Ru on Ti

Composite oxides of Pb and Ru have been deposited on Ti rotating disc elect rodes and tested as anode materials for the oxygen evolution reaction (oer) from aqueous sulfuric acid. The composite oxides have been anodically depo sited according to two different procedures: (i) the electrolysis of suspen sions of RuO2 particles in Pb2+ -containing electrolytes, or (ii) the elect rolysis of solutions containing both Pb2+ and Ru3+. Both procedures are ess entially successful, as the passivation of Ti (previously etched in aqueous HF) does not prevent oxide deposition. The former route leads to more acti ve materials than the latter. Considering the oer overpotential and service life, the performance of these layers deposited on Ti is comparable to or better than those of oxides grown on a noble substrate (described in a prev ious paper). (C) 2000 Elsevier Science B.V. All rights reserved.