Atypical stability of exsolved Ni-Fe alloy nanoparticles on double layered perovskite for CO2 dry reforming of methane

Xueli Yao, Qingpeng Cheng, Yerrayya Attada, Samy Ould-Chikh, Adrian Ramírez, Xueqin Bai, Hend Omar Mohamed, Guanxing Li, Genrikh Shterk, Lirong Zheng, Jorge Gascon, Yu Han, Osman M. Bakr, Pedro Castaño*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Dry reforming of methane simultaneously achieves several sustainability goals: valorizing methane-activating carbon dioxide while producing syngas. The catalyst has an enormous influence on the process viability by controlling activity, selectivity, and stability. A catalyst with uniform-sized Ni-Fe alloy nanoparticles anchored into PrBaMn1.6Ni0.3Fe0.1O5+δ double-layered perovskite is assembled via a facile one-step reduction strategy. Our method attains more exsolved Ni nanoparticles (94 %) than the common conditions. The exsolved Ni0.15Fe0.05 catalyst shows exceptional stability in 260 h tests at 800 °C, with one of the slowest coke formation rates compared with the state-of-the-art catalysts. Besides, no deactivation was observed during 40 h operation at more demanding and coking conditions (14 bar) where this process is more likely to operate industrially. Via experimental characterizations and computational calculations, the stability of the robust exsolved Ni-Fe catalyst is demonstrated by its unique balance of adsorbed species, which inhibits coking.

Original languageEnglish (US)
Article number122479
JournalApplied Catalysis B: Environmental
Volume328
DOIs
StatePublished - Jul 5 2023

Bibliographical note

Funding Information:
This work was conducted thanks to the financial support of the King Abdullah University of Science and Technology (KAUST, BAS/1/1403 ).

Publisher Copyright:
© 2023 The Authors

Keywords

  • Coking resistant
  • Dry reforming of methane
  • Exsolution
  • Ni-Fe alloy
  • Perovskite oxide

ASJC Scopus subject areas

  • Catalysis
  • General Environmental Science
  • Process Chemistry and Technology

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