Synergetic Effect of Ni-CeO₂ Bimetallic Catalyst for an Effective Decomposition of Methane to Hydrogen and Filamentous Nanocarbons

Adeel Ahmad, Iqra Reyaz Hamdani, Abdul Rasheed Pillantakath, Ahmed Al Shoaibi, Srinivasakannan Chandrasekar*, Mohammad Mozahar Hossain

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The work attempts to synthesis nickel-ceria bimetallic catalysts supported on porous carbon template, thermally stable at 850 °C, for dehydrogenation of methane to hydrogen and carbon nanostructures. A series of bimetallic Ni catalysts were synthesized by varying the % ceria content (30Ni-5CeO2/AC, 30Ni-10CeO2/AC, and 30Ni-15CeO2/AC) using the incipient wetness impregnation approach. Among the set of bimetallic catalysts, the 30Ni-5CeO2/AC catalyst was found to offer highest methane conversion and stability. A maximum conversion of 90 % was achieved with 40 % methane feed concentration along with good catalyst stability. The promoter ceria at low concentration enhanced the dispersion of metal over the catalytic surface, resulting in adequate metal-support interaction. The ability of the carbon support along with promoter ceria enhanced the thermal stability of the Ni catalyst up to 850 °C, offering high conversion and catalyst stability has been the highlight of the work. Advanced analytical techniques were used to characterize the catalyst's structural, textural, and morphological properties both before and after the reaction. The morphological study of the best-performing catalyst demonstrated the formation of dense carbon nanotubes through tip-growth mechanism exhibiting a high aspect ratio.

Original languageEnglish
Article numbere202400700
JournalChemCatChem
Volume16
Issue number23
DOIs
StatePublished - 6 Dec 2024

Bibliographical note

Publisher Copyright:
© 2024 The Authors. ChemCatChem published by Wiley-VCH GmbH.

Keywords

  • activated carbon
  • ceria
  • hydrogen
  • methane decomposition
  • nickel

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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