High-performance three-dimensional SnO2–Sb electrode supported on titanium foam substrate prepared by solvothermal process

Abstract

Three-dimensional (3D) Ti/SnO2-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/SnO2-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/SnO2-Sb electrode with high performance for EAOP application.

High Selectivity toward Electrochemical Ozone Production of Sb‐SnO2 with Cu and Ni Co‐doped

“…On this basis, a steady layer of catalyst with a large loading amount can be grown on the Ti substrate via the facile two‐step solvothermal method. [ 18 ] As is shown in the scanning electron microscopy (SEM) image ( Figure a), the surface of Cu 1.45 Ni‐ATO is formed with a dense spherical agglomerate with an average diameter of 8 µm. Similar morphologies are observed on Ni‐ATO, Cu 0.24 Ni‐ATO, Cu 0.52 Ni‐ATO, Cu 0.83 Ni‐ATO, and Cu 1.97 Ni‐ATO (Figure S1, Supporting Information), which indicates that the doping of Cu won't significantly affect the structure of the catalytic layer.…”

Recent advancements in modified SnO2–Sb electrodes for electrochemical treatment of wastewater

“…25 The solution infiltrates the substrate through the cracks in the catalytic coating, leading to the formation of a non-conductive oxide layer between the substrate and the coating, which diminishes the conductivity and causes deactivation. 72 Conversely, methods such as introducing an intermediate layer, modifying the substrate material, or enhancing the catalytic layer are frequently employed to prolong the lifespan of SnO 2 –Sb. 73 These approaches are conducive to its commercial applications.…”