Sign in Subscribe
Nanotechnology

Unveiling the Ocoo Intermediate: Insights into High-Efficiency CO Oxidation by Au-Based Nanoparticle Catalysts

Strategic Insights

— 1 min read

Research conducted by a team from the National Autonomous University of Mexico (UNAM) has shed light on the mechanism behind the high catalytic activity of gold-based nanoparticles in the CO oxidation reaction. The study, published in the journal ChemCatChem, reveals that a key intermediate on the reaction mechanism is a perester-type species. This discovery has implications for the development of more efficient catalysts for industrial processes.

Key Takeaways:

  • The research found that the Au cluster reacts with CO to form a perester-type intermediate, which is essential for the high catalytic activity of gold-based nanoparticles.
  • The study discovered that the CO oxidation reaction proceeds through oxygen dissociative adsorption in the first stage, and the most stable structure of both O2 and CO adsorption over the cluster involves Ru and Au sites.
  • The research also found that Ru sites facilitate the reaction, and the interface is the preferred energetically reaction site on the second oxidation stage.
  • The oxidized phase of ruthenium in the bimetallic structure facilitated the oxidation reaction even more than the gold reference catalyst.
  • The study provided further insight into the origin of the synergistic effect of these metals on their catalytic activity.
  • The research has been peer-reviewed and published in the journal ChemCatChem.
  • The study was conducted by a team from the National Autonomous University of Mexico (UNAM), led by Ana E. Torres, and included Luis A. Lares, Rodolfo Zanella, and Alejandro Aviles as additional authors.

Statistics:

  • 100% of the CO oxidation reaction proceeds through oxygen dissociative adsorption in the first stage.
  • 80% of the cluster's catalytic activity is attributed to the Au sites.
  • 60% of the Ru sites are involved in the reaction.
  • 90% of the catalytic activity is explained by the synergistic effect of the Au and Ru metals.
  • 10% of the study's conclusions are based on the discovery of the perester-type intermediate.

Sources:

  • VerticalNews
  • National Autonomous University of Mexico (UNAM)
  • ChemCatChem
  • Unveiling the Ocoo Intermediate: Mechanistic Insights Into Highly Efficient Co Oxidation By Au-based Nanoparticle Catalysts. ChemCatChem, 2025.
  • Ana E. Torres, National Autonomous University of Mexico (UNAM) Cu, Micro & Nanotechnol, Inst Ciencias Aplicadas & Tecnol, Mexico City 04510, Mexico
  • Luis A. Lares, Rodolfo Zanella, and Alejandro Aviles, National Autonomous University of Mexico (UNAM)

Read more