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<p>As a volatile organic pollutant, toluene is difficult to be activated and removed at low temperature by conventional thermal catalytic oxidation. Therefore, we reported an Ag-Co bimetallic catalyst which is supported on hydroxyapatite (HAP) and prepared by the equal-volume distribution impregnation method and investigated its performance in toluene oxidation. Enhanced toluene removal was achieved by synergizing plasma with 3Ag/15Co/HAP catalysts at low temperatures, which also improved CO<sub>2</sub> selectivity. Toluene conversion and CO<sub>2</sub> selectivity peaked at 100% and 88%, respectively, at the input power of 13&#xa0;W, while the removal process demonstrated good stability during a 32&#xa0;h test. The uniform dispersion of Ag NPs on the carrier facilitates the conversion of filamentary discharge into a more uniform and efficient discharge, promoting the activation of surface oxygen and thereby improving toluene removal efficiency. Additionally, the interaction between Ag and Co generated more surface-active oxygen and lattice defects on the catalyst surface, resulting in excellent low-temperature reducibility.</p>

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A Novel Co Coordinated Highly Dispersed Nano Ag/HAP Catalysts in Enhanced Toluene Catalytic Oxidation with Non-Thermal Plasma

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Xuemin Wang,
  • Jiahui Li,
  • Pai Lu,
  • Shixin Liu,
  • Shuyao Zhang,
  • Enpeng Deng,
  • Yuxin Miao,
  • Zhen Zhao

摘要

As a volatile organic pollutant, toluene is difficult to be activated and removed at low temperature by conventional thermal catalytic oxidation. Therefore, we reported an Ag-Co bimetallic catalyst which is supported on hydroxyapatite (HAP) and prepared by the equal-volume distribution impregnation method and investigated its performance in toluene oxidation. Enhanced toluene removal was achieved by synergizing plasma with 3Ag/15Co/HAP catalysts at low temperatures, which also improved CO2 selectivity. Toluene conversion and CO2 selectivity peaked at 100% and 88%, respectively, at the input power of 13 W, while the removal process demonstrated good stability during a 32 h test. The uniform dispersion of Ag NPs on the carrier facilitates the conversion of filamentary discharge into a more uniform and efficient discharge, promoting the activation of surface oxygen and thereby improving toluene removal efficiency. Additionally, the interaction between Ag and Co generated more surface-active oxygen and lattice defects on the catalyst surface, resulting in excellent low-temperature reducibility.