V-modified Co3O4 nanorods with superior catalytic activity and thermostability for CO oxidation

Abstract

It is well known that Co₃O₄ nanomaterials with high catalytic activity can be easily deactivated at high temperature, which will further inhibit their practical applications in CO oxidation catalysis. Herein, we report a facile solvent-free strategy to synthesize V-modified Co₃O₄ nanorods. The V-modified Co₃O₄ nanorods (without pretreatment) showed superior catalytic activity for CO oxidation in normal feed gas, and 100% CO conversion can be achieved at a low temperature of 60 °C. Additionally, the incorporation of V into Co₃O₄ nanorods remarkably enhanced the sintering resistance performance at high temperature. Compared with unmodified Co₃O₄ nanorods, V-modified Co₃O₄ nanorods exhibit outstanding thermostability in the catalysis due to the strong interaction between V and Co. This is promising for the development of practical catalysts for CO oxidation with excellent anti-inactivation performance.