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Operando induced strong metal-support interaction of ultra-durable Ru/MgO catalysts for sintering- and coking-resistant bi-reforming of biogas to metgas (CO-2H2)

Author

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  • Huang, Xinyu
  • Lin, Weiting
  • Lu, Pengyin
  • Zhao, Zhichao
  • Xie, Jun
  • Zhong, Jiawei
  • Chen, Yong

Abstract

The bi-reforming of biogas exclusively to metgas (CO-2H2) is of great significance for the production of value-added chemical and fuels. However, the metal nanoparticles (NPs) sintering and coke deposition generally lead to the catalyst deactivation during the biogas reforming reaction. Comprehensive and detailed characterization (HRTEM, EDS mapping, XPS, In-situ CO-DRIFTS, etc.) demonstrate that the CO2 induced strong metal-support interaction (CO2-SMSI) between ultrafine Ru NPs and redox-inert MgO remarkably enhance the resistance to Ru sintering and carbon deposition. Meanwhile, the high Ruδ+/Ru0 ratio in neotype CO2-SMSI enhance the CH4 activation, and lead to enhanced catalytic activity. The Ru/MgO catalysts with operando formed CO2-SMSI exhibit high CH4 & CO2 conversion (∼92 % and 54 % at 800 °C) and exceptional long-period stability (1000 h) without any deactivation in the bi-reforming of biogas. This study highlights the design of ultra-durable nano-catalyst with neotype CO2-SMSI for thermal catalytic conversion of C1 molecules at high reaction condition.

Suggested Citation

  • Huang, Xinyu & Lin, Weiting & Lu, Pengyin & Zhao, Zhichao & Xie, Jun & Zhong, Jiawei & Chen, Yong, 2025. "Operando induced strong metal-support interaction of ultra-durable Ru/MgO catalysts for sintering- and coking-resistant bi-reforming of biogas to metgas (CO-2H2)," Energy, Elsevier, vol. 337(C).
    • Handle: RePEc:eee:energy:v:337:y:2025:i:c:s036054422504277x
    DOI: 10.1016/j.energy.2025.138635
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    References listed on IDEAS

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    1. Jun Zhou & Zhe Gao & Guolei Xiang & Tianyu Zhai & Zikai Liu & Weixin Zhao & Xin Liang & Leyu Wang, 2022. "Interfacial compatibility critically controls Ru/TiO2 metal-support interaction modes in CO2 hydrogenation," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
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