Clean hydrogen production from ammonia decomposition over zeolite 13X-supported Ni catalysts

Jiyu Kim, Kyoung Deok Kim, Unho Jung, Yongha Park, Ki Bong Lee, Kee Young Koo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Unlike most H2 production methods, the decomposition of NH3 does not result in carbon dioxide emission and is therefore classified as clean technology. Thus, NH3 holds great promise for the large-scale transportation and storage of H2, and efficient low-temperature NH3 decomposition catalysts are highly sought after. Herein, we examined the textural properties and NH3 decomposition performances of zeolite 13X-supported Ni catalysts prepared by ion exchange, deposition precipitation, and incipient wetness impregnation. The main surface species were identified as Ni phyllosilicates (ion exchange), NiO + Ni phyllosilicates (deposition precipitation), and NiO (impregnation). Compared to other catalysts, the catalyst produced by deposition precipitation achieved the highest H2 formation rate (22.9 mmol gcat−1 min−1 at 30 000 mL gcat−1 h−1, 600 °C) and exhibited a 30-40 °C lower nitrogen desorption temperature. Given that nitrogen desorption is assumed to be the rate-determining step of catalytic NH3 decomposition, this decrease in the desorption temperature was attributed to improved low-temperature performance. Specifically, the excellent performance of the catalyst obtained by deposition precipitation was ascribed to its large specific surface area and strong metal-support interactions due to the high dispersion and uniform deposition of the active Ni metal on the surface and in the pores of the zeolite support.

Original languageEnglish
Pages (from-to)896-904
Number of pages9
JournalSustainable Energy and Fuels
Issue number5
Publication statusPublished - 2024 Jan 12

Bibliographical note

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology


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