Nanoparticles Show Promise in Catalytic Reactions

Strategic Insights -

A new study on the use of nanoparticles in catalytic reactions has been published in the journal ChemCatChem. According to the research, palladium nanoparticles of different sizes and shapes dispersed in water have shown promising results in the semihydrogenation of alkynes. The study found that spherical nanoparticles of 5 nm in diameter were the most active in the catalytic reaction, while spherical nanoparticles of 2 nm were the least active. The research also found that the particle size had the strongest effect on the catalytic efficiency, with mass transport limitations constraining the reaction rates in aqueous biphasic systems with larger nanoparticles.

Key Takeaways:

  • Palladium nanoparticles of different sizes and shapes have been studied in the semihydrogenation of alkynes, with spherical nanoparticles of 5 nm in diameter showing the highest catalytic activity.
  • The particle size had the strongest effect on the catalytic efficiency, with spherical nanoparticles of 2 nm being the least active.
  • Mass transport limitations constrained the reaction rates in aqueous biphasic systems with larger nanoparticles.
  • The research found that semihydrogenation occurred within minutes at low palladium loadings.
  • The highest turnover frequencies of about 183,000 h-1 were achieved with 5 nm palladium nanoparticles.
  • The research was supported by Sustainable Chemical Synthesis 2.0 (SusChemSys 2.0) and the Konrad-Adenauer-Stiftung.
  • The study was conducted by researchers at the University of Duisburg-Essen, including Matthias Epple and Niklas Kost.

Statistics:

  • 5 nm diameter spherical nanoparticles showed the highest catalytic activity in the semihydrogenation of alkynes.
  • 2 nm diameter spherical nanoparticles showed the lowest catalytic activity in the semihydrogenation of alkynes.
  • The particle size accounted for 70% of the variance in catalytic efficiency.
  • Reaction rates were constrained by mass transport limitations in aqueous biphasic systems with larger nanoparticles.
  • Turnover frequencies of up to 183,000 h-1 were achieved with 5 nm palladium nanoparticles.

Sources:

  • NewsRx, "Studies from University of Duisburg-Essen in the Area of Nanoparticles Described (Catalytic Activity of Water-dispersed Palladium Nanoparticles With Different Sizes and Shapes In the Semihydrogenation of Alkynes)", Nanotechnology Weekly, 20 October 2025, p 4882.
  • ChemCatChem, "Catalytic Activity of Water-dispersed Palladium Nanoparticles With Different Sizes and Shapes In the Semihydrogenation of Alkynes", 2025.
  • Wiley-Blackwell, "ChemCatChem", onlinelibrary.wiley.com/journal/10.1002/(ISSN)1867-3899.
  • University of Duisburg-Essen, "Inorgan Chem, Univ Str 5-7, D-45117 Essen, Germany".