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<p>This study synthesized iron-based perovskite LaFeO<sub>3</sub> catalysts (L<sub>x</sub>FO, x = 1, 0.67, 0.43, 0.25, 0.11) via a hydrothermal method, featuring varying La/Fe molar ratios. The samples were subsequently analyzed through a series of characterization techniques. These catalysts were then employed to catalyze the degradation of toluene, evaluating the performance of the catalysts. Results indicated that the L<sub>0.25</sub>FO sample exhibited a high specific surface area (68.0 m<sup>3</sup>/g) and outstanding catalytic performance (T<sub>90</sub> = 318&#xa0;°C). Following water resistance, stability, and recyclability testing, L<sub>0.25</sub>FO also demonstrated excellent catalytic stability and recyclability. The degradation pathway for toluene was proposed through the integration of in situ diffuse reflect Fourier transform infrared spectroscopy (DRIFTS) with thermal desorption gas chromatography-mass spectrometry (TD-GC-MS). This study provides a direction for designing perovskite materials that enhance the catalytic oxidation performance of volatile organic compounds (VOCs).</p> Graphical Abstract <p></p>

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Tuning the La/Fe Molar Ratio in LaFeO3 Perovskite Catalysts to Boost Catalytic Performance for Toluene Degradation

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Lei Guo,
  • Chenwei Liu,
  • Mingyu Zhang,
  • Hongli Chen,
  • Shujian Cai,
  • Fukun Bi,
  • Yuxin Wang,
  • Xiaodong D. Zhang

摘要

This study synthesized iron-based perovskite LaFeO3 catalysts (LxFO, x = 1, 0.67, 0.43, 0.25, 0.11) via a hydrothermal method, featuring varying La/Fe molar ratios. The samples were subsequently analyzed through a series of characterization techniques. These catalysts were then employed to catalyze the degradation of toluene, evaluating the performance of the catalysts. Results indicated that the L0.25FO sample exhibited a high specific surface area (68.0 m3/g) and outstanding catalytic performance (T90 = 318 °C). Following water resistance, stability, and recyclability testing, L0.25FO also demonstrated excellent catalytic stability and recyclability. The degradation pathway for toluene was proposed through the integration of in situ diffuse reflect Fourier transform infrared spectroscopy (DRIFTS) with thermal desorption gas chromatography-mass spectrometry (TD-GC-MS). This study provides a direction for designing perovskite materials that enhance the catalytic oxidation performance of volatile organic compounds (VOCs).

Graphical Abstract