Multiple Reaction Paths for CO Oxidation on a 2D SnOx Nano-Oxide on the Pt(110) Surface: Intrinsic Reactivity and Spillover

Jian Zheng, Michael Busch, Luca Artiglia, Tomás Skála, Jan Rossmeisl, Stefano Agnoli*

*Corresponding author for this work

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Abstract

An interface stabilized SnOx/Pt(110) nano-oxide characterized by a c(2 × 4) surface reconstruction is prepared and characterized by low-energy electron diffraction (LEED), synchrotron radiation photoemission spectroscopy (SRPES), and scanning tunneling microscopy (STM). Based on the experimental data, atomic models for the nano-oxide are proposed and then validated by comparing the experimental results with the outcome of first-principle calculations. The reactivity of the nano-oxide toward CO is investigated, obtaining that the c(2 × 4) reconstruction efficiently oxidizes CO to CO2. The SnOx nano-oxide on the Pt(110) surface can act as a reservoir for oxygen that can diffuse on the adjacent Pt areas where it oxidizes CO. This spillover effect endows the SnOx/Pt(110) system with enhanced tolerance to CO poisoning.
Original languageEnglish
Article number1801874
JournalAdvanced Materials Interfaces
Volume6
Issue number6
Number of pages9
ISSN2196-7350
DOIs
Publication statusPublished - 2019

Keywords

  • CO reactivity
  • Density fucntional theory
  • Nano-oxide
  • Photoemission spectroscopy
  • Scanning tunneling microscopy

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