Abstract:This work is devoted to the development of a low cost dimensionally stable anode with high oxygen evolution catalytic activity for practical applications. For this purpose, a Ti/SnO_x/MnO₂ anode was fabricated through an innovative strategy involving Sn electrodeposition, oxidation, and MnO₂-layer preparation. The structure of the anode was characterized, and the oxygen evolution performance was evaluated in a H₂SO₄ solution. The results show that compared with the Ti/SnO₂/MnO₂ anode prepared by the conventional brushing-annealing process, the Ti/SnO_x/MnO₂ anode fabricated through the innovative procedure exhibits a lower oxygen evolution potential and a nearly 40% longer accelerated lifespan. The superior oxygen evolution performance of the Ti/SnO_x/MnO₂ anode is attributed to the distinctive SnO_x intermediate layer fabricated through Sn electrodeposition followed by oxidation, which indicates the great potential of the anode as a dimensionally stable anode for metal electrowinning and hydrogen production by electrolysis, etc.

Key words: dimensionally stable anode; oxygen evolution catalytic performance; SnO₂ intermediate layer; MnO₂ catalyst