Volume 8 Issue 2
Apr.  2023
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Article Navigation >  Green Energy&Environment  > 2023  >  8(2): 538-547
Xunxun Li, Yaru Wang, Dongyun Chen, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu. A highly dispersed Pt/copper modified-MnO2 catalyst for the complete oxidation of volatile organic compounds: The effect of oxygen species on the catalytic mechanism. Green Energy&Environment, 2023, 8(2): 538-547. doi: 10.1016/j.gee.2021.07.004
Citation: Xunxun Li, Yaru Wang, Dongyun Chen, Najun Li, Qingfeng Xu, Hua Li, Jinghui He, Jianmei Lu. A highly dispersed Pt/copper modified-MnO2 catalyst for the complete oxidation of volatile organic compounds: The effect of oxygen species on the catalytic mechanism. Green Energy&Environment, 2023, 8(2): 538-547. doi: 10.1016/j.gee.2021.07.004
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A highly dispersed Pt/copper modified-MnO2 catalyst for the complete oxidation of volatile organic compounds: The effect of oxygen species on the catalytic mechanism

doi: 10.1016/j.gee.2021.07.004

  • College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu, 215123, China

Funds:

We gratefully acknowledge the financial support provided by the National Key R&D Program of China (2020YFC1808401), National Natural Science Foundation of China (22078213, 21938006, 51973148, 21776190), cutting-edge technology basic research project of Jiangsu (BK20202012) and the project supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

  • Received date 10 May 2021, Accepted date 20 July 2021, RevRecd date 05 July 2021, Publish date 24 July 2021,
    Abstract
  • Manganese oxide (MnO2) exhibits excellent activity for volatile organic compound oxidation. However, it is currently unknown whether lattice oxygen or adsorbed oxygen is more conducive to the progress of the catalytic reaction. In this study, novel hollow highly dispersed Pt/Copper modified-MnO2 catalysts were fabricated. Cu2+ was stabilized into the δ-MnO2 cladding substituting original K+, which produced lattice defects and enhance the content of adsorbed oxygen. The 2.03 wt% Pt Cu0.050-MnO2 catalyst exhibited the highest catalytic activity and excellent stability for toluene and benzene oxidation, with T100= 160 °C under high space velocity (36,000 mL g-1 h-1). The excellent performance of catalytic oxidation of VOCs is attributed to the abundant adsorbed oxygen content, excellent low-temperature reducibility and the synergistic catalytic effect between the Pt nanoparticles and Cu0.050-MnO2. This study provides a comprehensive understanding of the Langmuir–Hinshelwood (L-H) mechanism occurring on the catalysts.

     

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