Unraveling interlayer effects of exfoliated NiAl-LDH nanosheet catalysts for efficient CO2 methanation
8
Issued Date
2026-06-10
Resource Type
ISSN
03603199
Scopus ID
2-s2.0-105038691794
Journal Title
International Journal of Hydrogen Energy
Volume
241
Rights Holder(s)
SCOPUS
Bibliographic Citation
International Journal of Hydrogen Energy Vol.241 (2026)
Suggested Citation
Sivakumar M., Kunthakudee N., Gebreegziabher H.G., Fukuhara C., Rungtaweevoranit B., Ratchahat S. Unraveling interlayer effects of exfoliated NiAl-LDH nanosheet catalysts for efficient CO2 methanation. International Journal of Hydrogen Energy Vol.241 (2026). doi:10.1016/j.ijhydene.2026.155286 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/116816
Title
Unraveling interlayer effects of exfoliated NiAl-LDH nanosheet catalysts for efficient CO2 methanation
Corresponding Author(s)
Other Contributor(s)
Abstract
The carbon dioxide (CO<inf>2</inf>) methanation process offers a promising route for recycling CO<inf>2</inf> into fuels and chemicals. However, achieving low-temperature CO<inf>2</inf> methanation remains a critical challenge. In this study, NiAl-layered double hydroxides (LDHs) with a nanosheet-like structure were exfoliated using different solvents (DI H<inf>2</inf>O, EtOH, Ace, IPA), resulting in NiAl-X (X = DI H<inf>2</inf>O, EtOH, Ace, IPA) exfoliated nanosheet-like structures. The physicochemical properties of the exfoliated NiAl catalysts were characterized using various techniques, and the dispersion of Ni metal from LDH exfoliation was evaluated in different solvents. The NiAl–EtOH catalyst exhibits the excellent performance, achieving 90.38% CO<inf>2</inf> conversion, 100% CH<inf>4</inf> selectivity, and high CH<inf>4</inf> yield at low temperature of 270 °C. The NiAl–EtOH catalyst exhibited excellent CO<inf>2</inf> conversion and CH<inf>4</inf> selectivity stability over 200 h at the optimized temperature of 270 °C. The DRIFTS study reveals CO<inf>2</inf> methanation over NiAl–EtOH proceeds via the formate reaction pathway.