The role of Ir in ternary Rh-based catalysts for syngas conversion to C 2 + oxygenates

Vassiliki Alexandra Glezakou, John E. Jaffe, Roger Rousseau, Donghai Mei, Shawn M. Kathmann, Karl O. Albrecht, Michel J. Gray, Mark A. Gerber

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Transition metal modified Rh-catalysts can be used for converting syngas (CO + H 2) into C 2 + oxygenates. It has been found that Mn has a favorable effect in the selectivity towards oxygenates, while addition of Ir to the binary Rh-Mn catalysts significantly increases the space-time-yield (STY) of C 2 + oxygenates, mainly by formyl formation at the early stages of conversion. Quantum mechanical calculations used to investigate the distribution of promoter sites in Rh-rich nanoparticles show that moderately high Mn/Ir ratios result in particles with all 3 metals on the surface, and that Ir atoms act as co-adsorption sinks of CO and H leading to HCO in the initial stages.

Original languageEnglish
Pages (from-to)595-600
Number of pages6
JournalTopics in Catalysis
Issue number7-10
Publication statusPublished - Jul 2012


  • DFT models
  • Ir-Mn-Rh nanoparticle
  • Syngas conversion

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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