In situ investigation of the CO2 methanation on carbon/ceria-supported Ni catalysts using modulation-excitation DRIFTS

Liliana P.L. Gonçalves, Jerrik Mielby, O. Salomé G.P. Soares, Juliana P.S. Sousa, Dmitri Y. Petrovykh, Oleg I. Lebedev, M. Fernando R. Pereira*, Søren Kegnæs*, Yury V. Kolen’ko

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

9 Downloads (Pure)

Abstract

The development of novel cost-efficient, high-performing catalysts for CO2 methanation that are active at low temperatures can be optimized through the understanding of the reaction mechanism on different materials. A series of Ni-based catalysts supported on CeO2 and carbon/CeO2 composites was investigated, showing that Ni nanoparticles supported on a carbon/CeO2 composite with a 50:50 weight ratio and on pure CeO2 have excellent low-temperature activity and achieve up to 87% CO2 conversion with full selectivity towards CH4 at 370 °C. Importantly, meaningful insights on the reaction mechanism were gathered for the different types of materials by using the emerging ME−PSD−DRIFTS technique. The study of the rate of formation/consumption of the various intermediates showed that the CO2 methanation reaction follows a combination of the CO and formate pathways in the case of Ni on pure CeO2; however, in the case of Ni on the carbon/CeO2 composite, it follows only the formate pathway.
Original languageEnglish
Article number121376
JournalApplied Catalysis B: Environmental
Volume312
Number of pages13
ISSN0926-3373
DOIs
Publication statusPublished - 2022

Keywords

  • Heterogeneous catalysis
  • Carbon dioxide
  • Methane
  • Reaction mechanism
  • In situ DRIFTS

Fingerprint

Dive into the research topics of 'In situ investigation of the CO2 methanation on carbon/ceria-supported Ni catalysts using modulation-excitation DRIFTS'. Together they form a unique fingerprint.

Cite this