Work

Enhancing electrocatalytic performance for SnO2-Sb, Ni coatings induced by high-resistance layer and surface active layer in combination with alternating thick/thin layer method

Year: 2025

Type: article

Abstract: Developing an electrochemical degradation system with high catalytic efficiency and extended operational lifetime is crucial for practical industrial applications. In this study, a novel Sb, Ni-doped tin oxide-coated electrode, named as A@SnO2-Sb-Ni/SnO2-Sb/Ti, featuring with a high-resistance intermediate layer (HRIL) and surface active layer in combination with alternating thick and thin layers (ATTL) method was proposed to enhance both catalytic performance and stability. The potential divider effect of the SnO2-Sb HRIL and fine cracks on the surface induced by alternating thick and thin active layer not only effectively reduce the dissolution rate of the active layer but also inhibit the direct dissipation of the Ti substrate by the electrolyte, which collaboratively increase the overall stability of the electrode. Accelerated life test results demonstrated that the stability of the A@SnO2-Sb-Ni/SnO2-Sb/Ti electrode exhibited a stability improvement of 110% in acidic environments compared to the traditional SnO2-Sb-Ni/Ti electrode. At a constant current density of 10 mA cm−2 applied to a 4.0 cm2 electrode, nearly complete degradation of Rhodamine B (100 mL, 20 mg L−1) was achieved within 15 minutes.

Source: Chemical Engineering and Processing - Process Intensification

DOI: 10.1016/j.cep.2025.110313