Performance Evaluation of Nano Ag/Co Modified Hydroxyapatite Catalyst Synthesized via Dielectric Barrier Discharge for Highly Efficient Toluene Oxidation

In this study, series of Ag/Co-HAP catalysts were synthesized via a plasma-assisted method. Plasma, a partially ionized gas consisting of electrons, ions, neutral molecules, free radicals, photons, and excited species, serves as a highly reactive medium for catalyst modification. Its unique discharge properties enable effective modulation of active site dispersion, electronic structure, and metal-support interaction. The performance of catalysts prepared by conventional high-temperature calcination was compared with those treated by rapid plasma processing in the oxidative removal of toluene. The dielectric barrier discharge (DBD) plasma-treated catalyst exhibited superior low-temperature catalytic activity, achieving 100% toluene conversion at 275 °C with CO₂ selectivity of approximately 75%, outperforming its calcined counterpart. This work presents a facile approach for the preparation of Ag/5Co-HA-P catalysts. Owing to its precise control over catalyst architecture, combined with advantages such as low energy consumption, short processing time, and environmental friendliness, plasma treatment holds significant promise for applications in the field of catalysis.