Synergistic Effect of Oxygen Vacancy-Rich SnO and AgCl in the Augmentation of Sustained Oxygen Reduction Reaction.

Developing a stable and methanol-tolerant electrocatalyst for a sustained oxygen reduction reaction (ORR) is of great importance for advancing direct methanol fuel cell applications. The silver-based electrocatalysts are particularly interesting among the promising non-Pt-based electrocatalysts for ORR. Herein, we report a single-step synthesis of a composite of AgCl and SnO with oxygen vacancy (AgCl-SnO(V)), which exhibits sustained and selective catalytic activity for the ORR along with excellent durability.