Sintering-free catalytic ammonia cracking by vertically standing 2D porous framework supported Ru nanocatalysts

Seok Jin Kim, Thien Si Nguyen, Javeed Mahmood*, Cafer T. Yavuz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Catalytic ammonia decomposition enables ammonia to be a hydrogen gas carrier for a carbon-free fuel economy. The challenge is to obtain high conversion yields and rates at low temperatures for a prolonged time. A promising approach is to engineer a catalyst support to minimize deleterious effects like sintering. Here, we compared a conventional 2D planar porous framework support with a vertically standing 2D structure to ascertain the effects of support geometry on the catalytic performance. The catalysts were made by loading ruthenium (Ru) nanoparticles onto the structures, and the catalytic activities were monitored by varying the ammonia (NH3) feeding rate and reaction temperature. Unlike the planar version, the vertically standing 2D support prevented nanoparticle aggregation, retained the original nanoparticle size, and showed an excellent hydrogen production rate (95.17 mmol gRu−1 min−1) at a high flow rate of 32,000 mL gcat−1 h−1 at a temperature of 450 °C.

Original languageEnglish (US)
Article number142474
JournalChemical Engineering Journal
Volume463
DOIs
StatePublished - May 1 2023

Bibliographical note

Funding Information:
This research was supported by the King Abdullah University of Science and Technology ( KAUST ), Kingdom of Saudi Arabia, and the Nurturing Next-generation Researchers ( 2021R1A6A3A03039501 ) from the National Research Foundation (NRF) of Korea, Republic of Korea. The authors thank Ivan Gromicho of KAUST for the illustrations used in Figs. 1 and 4 .

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Aggregation prevention
  • Green hydrogen fuel
  • Layered materials
  • Porous phenazine frameworks
  • Ruthenium nanocatalysts
  • Thermal decomposition

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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