One-pot synthesis of atomically dispersed Pt on MnO2 for efficient catalytic decomposition of toluene at low temperatures

摘要

The catalytic degradation of volatile organic compounds (VOCs) at low temperature is still a great challenge for indoor air purification. In this paper, the doping of single-atom Pt into MnO2 with a one-pot hydrothermal process greatly improved the catalytic activity for toluene degradation at room temperature, achieving 100% conversion of 0.42 ppm toluene at 28 degrees C under the high gas-hourly-space-velocity of 300 L g(-1) h(-1). Furthermore, it achieved 100% conversion of 10 ppm toluene at 80 degrees C and complete oxidation into CO2 at 220 degrees C. The manganese and oxygen defects in MnO2 nanosheets effectively stabilized the single-atom platinum, and strong oxidative hydroxyl radicals ((OH)-O-center dot) is thought to contribute to its excellent performance.