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<p>To address the challenges of limited catalytic efficiency and chlorine poisoning in chlorinated volatile organic compounds (CVOCs) catalytic oxidation, chromium was incorporated into Co<sub>3</sub>O<sub>4</sub> derived from zeolitic imidazolate framework-67 (ZIF-67), leading to the development of chromium-cobalt bimetallic oxide CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> for the efficient catalytic degradation of 1,2-dichloroethane (1,2-DCE). The utilization of the ZIF-67 precursor in the construction of the CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> catalysts improves the specific surface area, the incorporation of CrO<sub>x</sub> renders abundant surface acidic sites, rich adsorbed oxygen species and Co<sup>3+</sup>/Co<sup>2+</sup>, Cr<sup>6+</sup>/Cr<sup>3+</sup> redox couples. The catalytic performance results indicate that the CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> catalysts exhibit remarkable catalytic activity and stability for 1,2-DCE, particularly the amorphous 30CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub>, achieving a T<sub>90</sub> value of 265&#xa0;°C and sustaining a conversion rate exceeding 90% at 290&#xa0;°C for 24&#xa0;h of stable operation at a gas hourly space velocity of 20,000&#xa0;mL·g<sup>−1</sup>·h<sup>−1</sup>.</p>

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Catalytic oxidation of 1,2-dichloroethane over CrOx/Co3O4 catalysts by incorporating CrOx into ZIF-67 derived Co3O4

  • 期刊论文

  • 发表日期：

    2025年1月13日

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  • Jialin Lv,
  • Pengfei Zhu,
  • Shuaini Wu,
  • Na Li,
  • Zhaoxia Hu,
  • Shouwen Chen

摘要

To address the challenges of limited catalytic efficiency and chlorine poisoning in chlorinated volatile organic compounds (CVOCs) catalytic oxidation, chromium was incorporated into Co3O4 derived from zeolitic imidazolate framework-67 (ZIF-67), leading to the development of chromium-cobalt bimetallic oxide CrOx/Co3O4 for the efficient catalytic degradation of 1,2-dichloroethane (1,2-DCE). The utilization of the ZIF-67 precursor in the construction of the CrOx/Co3O4 catalysts improves the specific surface area, the incorporation of CrOx renders abundant surface acidic sites, rich adsorbed oxygen species and Co3+/Co2+, Cr6+/Cr3+ redox couples. The catalytic performance results indicate that the CrOx/Co3O4 catalysts exhibit remarkable catalytic activity and stability for 1,2-DCE, particularly the amorphous 30CrOx/Co3O4, achieving a T90 value of 265 °C and sustaining a conversion rate exceeding 90% at 290 °C for 24 h of stable operation at a gas hourly space velocity of 20,000 mL·g−1·h−1.