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Influence of Ru incorporation on the catalytic performance of Co/MgO-Al2O3 aerogel catalysts for biogas reforming

  • Original Paper: Sol–gel and hybrid materials for catalytic, photoelectrochemical and sensor applications
  • Published:
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Abstract

Utilizing the abundant biogas resources in an efficient and sustainable way helps to mitigate the energy and environmental problems. CH4 oxy-CO2 reforming reaction is a promising technic and an efficient catalyst for the reaction is in great demand. In this work, Ru was incorporated into monometallic Co/MgO-Al2O3 aerogel catalyst via supercritical drying process combined with sol–gel method and a series of Co-Ru bimetallic aerogel catalyst with different Ru contents was synthesized. Catalytic performance screening for the catalysts indicated that combination of Ru and Co significantly raised the activity of monometallic catalysts, e.g., the activity of Co15-Ru0.2 (Co content: 15 wt.%, Ru content: 0.2 wt.%) was 64.7% and 63.9% higher than those of the monometallic Co15 and Ru0.5 catalysts, respectively. The results also indicated that Co/Ru ratio had a great influence on the catalytic activity: Co15-Ru0.2 > Co15-Ru0.1 ≈ Co15-Ru0.5 > Co15-Ru0.05 > Ru0.5 > Co15. XRD, BET, H2-TPR, XPS, TEM, TG/DSC, and FESEM analyses were performed, disclosing that the reducibility and active metal particle size of the catalysts can be manipulated by the Co/Ru ratio due to the transportation of bulk Co2+ to the surface. The Co15-Ru0.2 catalyst had a mean active metal particle size below 10 nm and medium reducibility, resulting in a high activity and stable performance.

Highlights

  • A Co-Ru/MgO-Al2O3 aerogel was prepared by sol-gel combined with supercritical deposition method.

  • The addition of Ru destabilized the Co spinel and promoted the reduction of Co species.

  • The synergy between Co-Ru promoted the catalytic performance which were better than the monometallic catalysts.

  • Co15-Ru0.2 showed the highest CH4 reforming activity and resistance to inactive carbon.

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Acknowledgements

The financial supports from the National Science foundation of China (No. 21306231), China Postdoctoral Science Foundation (No. 2018M632988), and Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds and Applications (No. 2021XGJSKFJJ01) are gratefully acknowledged.

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Correspondence to Lin Chen or Jiayuan Li.

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Chen, L., Wu, H., Chen, P. et al. Influence of Ru incorporation on the catalytic performance of Co/MgO-Al2O3 aerogel catalysts for biogas reforming. J Sol-Gel Sci Technol 99, 589–599 (2021). https://doi.org/10.1007/s10971-021-05610-1

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  • DOI: https://doi.org/10.1007/s10971-021-05610-1

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