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Investigation of H2 production via an integrated pathway of consecutive CO oxidation and dry methane reforming in the presence of Co3O4@HNTs catalyst

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Abstract

Pristine Co3O4 and Co3O4–halloysite nanotubes (Co3O4@HNTs) composite were synthesized and characterized using XRD, HR-TEM, Raman, and ATR–FTIR. Then, the catalytic activity of these materials towards dry methane reforming (DMR) either, the direct or indirect pathways were analyzed, through either direct or indirect pathways. The analysis was focused on the influence of different parameters, such as temperature, solid-phase mixture, and feeding gas stream composition. Results showed that both materials have bifunctional catalytic behavior. First, they showed high selectivity towards CO oxidation instead of methane oxidation, and subsequently, these materials also participated in the reaction between CH4 and CO2 to produce H2. The presence of oxygen in the gas stream, as well as the use of the halloysite as support, proved to be determining factors to prevent the formation of coke or metallic cobalt on the catalyst, which increases the H2 production. Finally, the highest H2 production was obtained using the Co3O4@HNTs composite under a gas stream composed of CH4/CO/O2 at 650 °C.

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Acknowledgements

C. Daza-Gómez thanks CONACYT for the Ph.D. scholarship (595211). D. Diaz thanks FQUNAM for the 5000-90-39 PAIP grant. J. Arturo Mendoza-Nieto thanks PAPIIT-UNAM IA-106321 and PAIP 5000-91-77 grant. We thank Ivan Puente (UNAM) for his technical assistance in HR-TEM and SEM techniques, and M. en C. Viridiana Maturano Rojas (Instituto de Ciencias Aplicadas y Tecnología, ICAT) in H2-TPR profiles.

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Correspondence to Lucy-Caterine Daza-Gómez.

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Daza-Gómez, LC., Ruiz-Ruiz, VF., Mendoza-Nieto, J.A. et al. Investigation of H2 production via an integrated pathway of consecutive CO oxidation and dry methane reforming in the presence of Co3O4@HNTs catalyst. Appl Nanosci 12, 2459–2476 (2022). https://doi.org/10.1007/s13204-022-02510-w

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  • DOI: https://doi.org/10.1007/s13204-022-02510-w

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