Identifying Support Effects in Au-Catalyzed CO Oxidation

Zachary R. Mansley, Ryan J. Paull, Louisa Savereide, Scott Tatro, Emily P. Greenstein, Abha Gosavi, Emily Cheng, Jianguo Wen, Kenneth R. Poeppelmeier, Justin M. Notestein, Laurence D. Marks*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Some catalytic oxide supports are more equal than others, with numerous variable properties ranging from crystal symmetry to surface chemistry and electronic structure. As a consequence, it is often very difficult to determine which of these act as the driver of performance changes observed in catalysis. In this work, we hold many of these variable properties constant with structurally similar LnScO3(Ln = La, Sm, and Nd) nanoparticle supports with cuboidal shapes and a common Sc-rich surface termination. Using CO oxidation over supported Au nanoparticles as a probe reaction, we observe higher activation energy and a slower rate using NdScO3as the support material. This change is found to correlate to the strength of CO2binding to the support surface, identified by temperature-programmed desorption measurements. The change is due to differences in the 4f electrons of the lanthanide cations, the cations’ Lewis acidity, and the inductive effect they impose.

Original languageEnglish (US)
Pages (from-to)11921-11928
Number of pages8
JournalACS Catalysis
Volume11
Issue number19
DOIs
StatePublished - Oct 1 2021

Keywords

  • DFT
  • electron microscopy
  • electronic structure
  • support effects
  • surfaces
  • thermodynamics

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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