Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity

Nguyen Thi Bich Hien, Hyo Young Kim, Mina Jeon, Jin Hee Lee, Muhammad Ridwan, Rizcky Tamarany, Chang Won Yoon

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

For application to ammonia dehydrogenation, novel Ru-based heterogeneous catalysts, Ru-N-C and Ru-C, were synthesized via simple pyrolysis of a mixture of RuCl3·6H2O and carbon black with or without dicyandiamide as a nitrogen-containing precursor at 550 °C. Characterization of the prepared Ru-N-C and Ru-C catalysts via scanning transmission electron microscopy, in conjunction with energy dispersive X-ray spectroscopy, indicated the formation of hollow nanocomposites in which the average sizes of the Ru nanoparticles were 1.3nm and 5.1nm, respectively. Compared to Ru-C, the Ru-N-C nanocomposites not only proved to be highly active for ammonia dehydrogenation, giving rise to a NH3 conversion of >99% at 550 °C, but also exhibited high durability. X-ray photoelectron spectroscopy revealed that the Ru active sites in Ru-N-C were electronically perturbed by the incorporated nitrogen atoms, which increased the Ru electron density and ultimately enhanced the catalyst activity.

Original languageEnglish
Pages (from-to)3442-3455
Number of pages14
JournalMaterials
Volume8
Issue number6
DOIs
Publication statusPublished - 2015

Keywords

  • Ammonia
  • Dehydrogenation
  • Fuel cell
  • Hollow graphitic structure
  • N-doping
  • Ru-N-C

Fingerprint

Dive into the research topics of 'Ru-N-C hybrid nanocomposite for ammonia dehydrogenation: Influence of N-doping on catalytic activity'. Together they form a unique fingerprint.

Cite this