Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

NO Reduction on Cu‐Based Model Catalysts Studied by in‐situ IRAS

NO Reduction on Cu‐Based Model Catalysts Studied by in‐situ IRAS Cu‐based catalyst has been widely used for catalytic reduction of NO. Well‐defined TiOx/Cu(110) films were prepared and investigated by in situ reflection absorption infrared spectroscopy (IRAS), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). A complex surface structure of Cu+(‐O‐Ti‐)‐O‐Cuδ+/Cu(110) was proposed, in which the topmost surface Cu+ is highly dispersed, isolated and fixed by the TiOx layer. Such a ‘single atom’‐like surface site appears a very narrow νCO peak at 2130 cm–1, and is more stable upon both CO reduction and vacuum annealing than the Cu2O/Cu(110). Such isolated Cu+(‐O‐Ti‐) site on TiOx/Cu(110) is also fairly stable in NO+CO reaction, but the overall catalytic activity is slightly lower than that on the Cu(110) surface, indicating that the single‐atom Cu+(‐O‐Ti‐) site is less efficient for NO+CO reaction at the examined conditions. The study provides useful information for the design and application of single‐atom catalysts and understanding the nature of catalytically active centers. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chinese Journal of Chemistry Wiley

NO Reduction on Cu‐Based Model Catalysts Studied by in‐situ IRAS

Loading next page...
 
/lp/wiley/no-reduction-on-cu-based-model-catalysts-studied-by-in-situ-iras-girjA4CPTh

References (13)

Publisher
Wiley
Copyright
© 2022 SIOC, CAS, Shanghai, & WILEY‐VCH GmbH
eISSN
1614-7065
DOI
10.1002/cjoc.202100862
Publisher site
See Article on Publisher Site

Abstract

Cu‐based catalyst has been widely used for catalytic reduction of NO. Well‐defined TiOx/Cu(110) films were prepared and investigated by in situ reflection absorption infrared spectroscopy (IRAS), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). A complex surface structure of Cu+(‐O‐Ti‐)‐O‐Cuδ+/Cu(110) was proposed, in which the topmost surface Cu+ is highly dispersed, isolated and fixed by the TiOx layer. Such a ‘single atom’‐like surface site appears a very narrow νCO peak at 2130 cm–1, and is more stable upon both CO reduction and vacuum annealing than the Cu2O/Cu(110). Such isolated Cu+(‐O‐Ti‐) site on TiOx/Cu(110) is also fairly stable in NO+CO reaction, but the overall catalytic activity is slightly lower than that on the Cu(110) surface, indicating that the single‐atom Cu+(‐O‐Ti‐) site is less efficient for NO+CO reaction at the examined conditions. The study provides useful information for the design and application of single‐atom catalysts and understanding the nature of catalytically active centers.

Journal

Chinese Journal of ChemistryWiley

Published: Jun 1, 2022

Keywords: Copper; Nitrogen oxides; IR spectroscopy; Single‐atom Cu +; TiO x thin film

There are no references for this article.