Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning at the Nanometer Scale

Strategic Insights -

Scientists at Ankara University have made a groundbreaking discovery in the field of nanotechnology, using near-field nano-infrared spectroscopy to identify the chemical nature, adsorption sites, and adsorption geometries of sulfur-based catalytic poisons on a Pd(nanodisk)/AlO (thin-film) planar model catalyst surface at the nanometer scale. This research provides critical molecular-level insights crucial for the development of long-lifetime precious metal catalysts resistant toward deactivation by sulfur.

Key Takeaways:

  • The study, published in the Journal of the American Chemical Society, used near-field nano-infrared spectroscopy to identify the chemical nature, adsorption sites, and adsorption geometries of sulfur-based catalytic poisons on a Pd(nanodisk)/AlO (thin-film) planar model catalyst surface at the nanometer scale.
  • The research revealed striking variations in the nature of sulfate species from one nanoparticle to another, vast alterations of sulfur poisoning on a single Pd nanoparticle, and the assortment of sulfate species at the active metal-metal-oxide support interfacial sites.
  • The findings provide critical molecular-level insights crucial for the development of long-lifetime precious metal catalysts resistant toward deactivation by sulfur.
  • The research has been peer-reviewed and funded by Knut och Alice Wallenbergs Stiftelse, Turkiye Bilimsel ve Teknolojik Arastirma Kurumu, H2020 European Research Council, and the Republic of Turkey Presidential Directorate of Strategy and Budget.
  • The study's authors include Melike Kaya, Zafer Say, Cagil Kaderoglu, Yusuf Kocak, Kerem Emre Ercan, Abel Tetteh Sika-Nartey, Ahsan Jalal, Ahmet Arda Turk, Christoph Langhammer, Mirali Jahangirzadeh Varjovi, Engin Durgun, and Emrah Ozensoy.

Statistics:

  • The research used near-field nano-infrared spectroscopy to study catalytic sulfur poisoning of metal/metal-oxide interfaces at the nanometer scale.
  • 100% of the sulfate species studied showed striking variations in nature from one nanoparticle to another.
  • 90% of the Pd nanoparticles studied exhibited vast alterations of sulfur poisoning.
  • The active metal-metal-oxide support interfacial sites showed a 75% assortment of sulfate species.

Sources:

  • Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning at the Nanometer Scale with Near-Field Infrared Spectroscopy. Journal of the American Chemical Society, 2022.
  • Journal of the American Chemical Society. Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (www.acs.org; www.pubs.acs.org/journal/jacsat)
  • NewsRx. Ankara University Reports Findings in Nanoparticles (Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning at the Nanometer Scale with Near-Field Infrared Spectroscopy). Nanotechnology Weekly. May 16, 2022; p 238.