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Title: Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning atthe Nanometer Scale with Near-Field Infrared Spectroscopy br
Authors: Say, Zafer
Kaya, Melike
Kaderoglu, Cagil
Kocak, Yusuf
Ercan, Kerem Emre
Sika-Nartey, Abel Tetteh
Ozensoy, Emrah
Keywords: Reflection-Absorption Spectroscopy
Total-Energy Calculations
Acid Anion
Bisulfate Anion
Issue Date: 2022
Publisher: Amer Chemical Soc
Source: Say, Z., Kaya, M., Kaderog?lu, C., Koc?ak, Y., Ercan, K. E., Sika-Nartey, A. T., ... & Ozensoy, E. (2022). Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning at the Nanometer Scale with Near-Field Infrared Spectroscopy. Journal of the American Chemical Society.
Abstract: :fundamental understanding of catalytic deactivation phenomenasuch as sulfur poisoning occurring on metal/metal-oxide interfaces is essential forthe development of high-performance heterogeneous catalysts with extendedlifetimes. Unambiguous identification of catalytic poisoning species requiresexperimental methods simultaneously delivering accurate information regardingadsorption sites and adsorption geometries of adsorbates with nanometer-scalespatial resolution, as well as their detailed chemical structure and surface functionalgroups. However, to date, it has not been possible to study catalytic sulfurpoisoning of metal/metal-oxide interfaces at the nanometer scale withoutsacrificing chemical definition. Here, we demonstrate that near-field nano-infraredspectroscopy can effectively identify the chemical nature, adsorption sites, and adsorption geometries of sulfur-based catalyticpoisons on a Pd(nanodisk)/Al2O3(thin-film) planar model catalyst surface at the nanometer scale. The current results reveal strikingvariations in the nature of sulfate species from one nanoparticle to another, vast alterations of sulfur poisoning on a single Pdnanoparticle as well as at the assortment of sulfate species at the active metal-metal-oxide support interfacial sites. Thesefindingsprovide critical molecular-level insights crucial for the development of long-lifetime precious metal catalysts resistant towarddeactivation by sulfur
ISSN: 0002-7863
Appears in Collections:Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology Engineering
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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