Mesoporous Co3O4 supported Pt catalysts for low-temperature oxidation of acetylene

Abstract

Three-dimensionally ordered mesoporous Co₃O₄ (meso-Co₃O₄) and its supported Pt catalysts were synthesized for the catalytic oxidation of acetylene. All the catalysts formed mesoporous structures and possessed high surface areas of 110–122 m² g⁻¹. Meso-Co₃O₄-supported Pt catalysts exhibited highly catalytic performances, and the 0.6Pt/meso-Co₃O₄ catalyst gave the lowest temperature of 120 °C for acetylene oxidation. It was concluded that the ordered mesoporous structure, with plenty of structural defects, good low-temperature reducibility and the high concentration of active oxygen species were responsible for the excellent catalytic performance of 0.6Pt/meso-Co₃O₄.