High-performance three-dimensional SnO 2 –Sb electrode supported on titanium foam substrate prepared by solvothermal process

Three-dimensional (3D) Ti/SnO 2 –Sb electrode is promising for electrochemical oxidation process (EAOP) application, while hindered by uneven and low catalysts loading, especially on the inner surface of porous substrates. In this study, Ti foam and a solvothermal preparation method were developed for preparing a novel 3D Ti/SnO 2 –Sb electrode. The catalysts in hollow ellipsoidal shape were well dispersed and stacked on the outer surface, and fully grown along the rugged surface inside Ti foam. Owing to this distinctive structure, the Ti foam/ATO electrode expressed 1.89 times increasing electrochemically active surface area and 48% improved OH· production than the 2D Ti plate/ATO electrode. Moreover, the Ti foam/ATO electrode performed 1.57 years of predicted service life which is 65.8 times than that of Ti plate/ATO electrode. In conclusion, this study provided a facile method and a novel porous substrate to prepare 3D Ti/SnO 2 –Sb electrode with high performance for EAOP application. Graphical abstract