Enhancing the electrochemical activity and stability of Sb-SnO2 based electrodes by the introduction of nickel oxide

Antimony doped tin(IV) oxide (Sb-SnO2) based electrodes are attractive candidates due to their high electrochemical activity but remain a grand challenge for stability. Therefore, there is an urgent need to develop approaches available for stabilizing electrode materials against deactivation during electrochemical oxidation process (EOP). Here we report a viable approach to extend the electrode lifetime without sacrificing its electrochemical activity. Electrochemical measurements showed that the introduction of NiO results in an increased voltammetric charge (q*) and excellent electrochemical activity towards methylene blue (MB) oxidation. TiO2-NiO@Sb-SnO2 electrode exhibited an improved electrochemical stability in comparison with TiO2@Sb-SnO2 counterpart. These merits coupled with high oxygen evolution potential (OEP) provide a foundation for a toolkit to design new electrodes with high electrochemical activity and stability. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study presents an effective approach to extend the lifetime of electrodes without sacrificing their electrochemical activity. The introduction of NiO leads to increased voltammetric charge and enhances the electrochemical activity towards methylene blue oxidation, resulting in improved stability of the TiO2-NiO@Sb-SnO2 electrode.