| 초록 |
This study synthesizes Ta(V)-doped SnO2 (TTO) electrocatalysts as alternatives to Sb-doped SnO2 (ATO) and systematically examines their electrocatalytic activity for the decomposition of organic substrates in various electrolyte solutions. The as-synthesized TTO exhibits the highest activity for the decomposition of phenol, N,N′-dimethyl-4-nitrosoaniline, and rhodamine-B at a Ta doping level of ~1%. The optimized TTO exhibits a higher activity for the decomposition of phenol than ATO in a chloride solution and a lower activity than ATO in a sulfate solution. Electron paramagnetic resonance analysis reveals that a relatively larger production of reactive oxygen species is achieved with ATO, whereas a larger production of reactive chlorine species is obtained with TTO. In the durability tests, both electrodes favor an alkaline condition over acidic and neutral conditions, and Ta-SnO2 is less stable than Sb-SnO2 over the full pH range. |
