Core-shell structured iron nanoparticles for the generation of COx-free hydrogen via ammonia decomposition

Yanxing Li, Shunqiang Liu, Lianghong Yao, Weijie Ji*, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


The iron nanoparticles that are encapsulated by microporous and mesoporous silica shells were synthesized for the generation of COx-free hydrogen through the catalytic decomposition of ammonia. The encapsulated iron nanoparticles show excellent catalytic activity, giving 100% ammonia conversion in the 650-670 °C range. The core-shell structured catalysts are highly stable under the adopted reaction conditions owing to the stable silica shells that effectively prevent aggregation of iron nanoparticles. In contrast, the naked iron nanoparticles deactivated gradually at 670 °C and lost 18% ammonia conversion in a period of 63 h.

Original languageEnglish
Pages (from-to)368-372
Number of pages5
JournalCatalysis Communications
Issue number5
Publication statusPublished - 25 Jan 2010

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

User-Defined Keywords

  • Ammonia decomposition
  • CO-free hydrogen
  • Core-shell structure
  • Iron nanoparticles
  • Silica


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