Exploring the Facet-Dependent Structural Evolution of Pt/CeO2 Catalysts Induced by Typical Pretreatments for CO Oxidation

Yao Lv, Aoran Li, Jiajie Ye, Haifeng Wang, Peijun Hu, Kuan Wen Wang, Yun Guo, Xuan Tang, Sheng Dai

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Atomic-scale insights into the interactions between metals and supports play a crucial role in optimizing catalyst design, understanding catalytic mechanisms, and enhancing chemical conversion processes. The effects of oxide support on the dynamic behavior of supported metal species during pretreatments or reactions have been attracting a lot of attention; however, very less systematic integrations are carried out experimentally using real catalysts. In this study, we here utilized facet-controlled CeO2 as examples to explore their influence on the supported Pt species (1.0 wt %) during the reducing and oxidizing pretreatments that are typically applied in heterogeneous catalysts. By employing a combination of microscopy, spectroscopy, and first-principles calculations, it is demonstrated that the exposed crystal facets of CeO2 govern the evolution behavior of supported Pt species under different environmental conditions. This leads to distinct local coordinations and charge states of the Pt species, which directly influence the catalytic reactivity and can be leveraged to control the catalytic performance for CO oxidation reactions.

Original languageEnglish
JournalACS Applied Materials and Interfaces
DOIs
StateAccepted/In press - 2024
Externally publishedYes

Keywords

  • ceria
  • facet-dependent
  • Pt
  • structural evolution
  • structure−property relationships

Fingerprint

Dive into the research topics of 'Exploring the Facet-Dependent Structural Evolution of Pt/CeO2 Catalysts Induced by Typical Pretreatments for CO Oxidation'. Together they form a unique fingerprint.

Cite this