Ti/PbO(2) + nano-Co(3)O(4) composite electrode materials with different compositions were prepared by anodic composite electrodeposition on Ti substrate, with a SnO(2)-Sb(2)O(5) intermediate layer in Pb(2+) plating solution containing suspended nano-Co(3)O(4) particles. The composition, structure, and morphology of the composite materials were investigated by XRD, XPS, and SEM analyses. The composite electrodes were studied as anodes for oxygen evolution reaction (OER) in 1 mol/L NaOH solution. The activities for the OER of the composites were explained by recording linear scanning voltammograms and Tafel plots. Results indicate that the onset potential of oxygen evolution at the composite electrode was lowered by approximately 160 mV compared to the PbO(2) electrode without nano-Co(3)O(4). The catalytic activity of the composite electrode towards OER was improved significantly. Crown Copyright (C) 2010 Published by Elsevier Ltd on behalf of Professor T. Nejat Veziroglu. All rights reserved.