Role of phase in NiMgAl mixed oxide catalysts for CO2 dry methane reforming (DRM)

Huy Nguyen-Phu, Taehyup Kim, Youngchan Kim, Ki Hyuk Kang, Hyungtae Cho, Junghwan Kim, Insoo Ro

Research output: Contribution to journalArticlepeer-review


Supported Ni catalysts are considered promising for dry methane reforming (DRM) because of their low cost and high activity. However, they suffer from coke formation at elevated reaction temperatures, leading to rapid catalyst deactivation. Here, we developed a synthesis route for highly active and stable nickel-based catalysts for DRM by changing the Mg/Al ratio. Manipulation of the Mg/Al ratio in NiMgAl catalysts induces a change in the phases present, which subsequently leads to enhancement in activity and stability. The highest activity and stability were observed when both spinel and periclase phases were present in the catalysts at Mg/Al ratio of 1.5 (Ni-Mg1.5AlOx). Based on X-ray diffraction (XRD), H2 temperature-programmed reduction (TPR), chemisorption, and UV-Vis-NIR characterizations, as well as CO2 temperature-programmed desorption (TPD), we found that the co-existence of spinel and periclase phases is associated with changes in Ni reducibility, basicity, and the location of Ni2+ species. This work demonstrates how a change in phase in catalysts influences key factors determining activity and stability for the design of active and stable catalysts.

Original languageEnglish
Article number113894
JournalCatalysis Today
Publication statusPublished - 2023 Mar 1

Bibliographical note

Funding Information:
This study was financially supported by Seoul National University of Science and Technology .

Publisher Copyright:
© 2023 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)


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