Catalytic oxidation of toluene over a porous Co3O4-supported ruthenium catalyst

Abstract

Porous Co₃O₄-MOF and Ru/Co₃O₄-MOF were prepared through a metal–organic frameworks (MOFs)-templated method, and the bulk materials resulted from precipitation method were prepared for comparison. All catalysts were tested for the catalytic oxidation of toluene in the temperature range of 150–300 °C, and Ru/Co₃O₄-MOF showed apparently higher catalytic activity and CO₂ selectivity than other materials. The influence of water vapour on the catalytic oxidation of toluene was studied at 235 °C and 245 °C, and it could be found that the inhibition effect weakened with the increase of temperature. Additionally, the test of 12 h on-stream reaction was conducted to explore the stability of Ru/Co₃O₄-MOF.