Abstract: PbO₂-WC composite electrode formed by dispersion of WC particles in PbO₂ wasprepared by using composite electrodeposition technique.The crystallographic structure andperformance of anodic oxygen evolution reaction in sulfuric acid medium of the compositeelectrode were studied.The results show that,as compared with the PbO₂ electrode contain-ing no WC particles,the PbO₂-WC composite electrode is smaller in crystal grain and morecompact in structure,its α-PbO₂ content is higher and crystallites are preferentially orientat-ed.Electrocatalytic activity for oxygen evolution reaction in 0.5mol/L H₂SO₄ solution of thecomposite electrode is increased nearly by one-fold.Chemical stability and electrochemicalstability of the composite coating are excellent.

Key words: PbO₂, WC, composite electrode, oxygen evolution, electrocatalysis