Aliovalent Doping of CeO2Improves the Stability of Atomically Dispersed Pt

Haodong Wang, Matthew Kottwitz, Ning Rui, Sanjaya D. Senanayake, Nebojsa Marinkovic, Yuanyuan Li, Ralph G. Nuzzo, Anatoly I. Frenkel

Research output: Contribution to journalArticlepeer-review

Abstract

Atomically dispersed supported catalysts hold considerable promise as catalytic materials. The ability to employ and stabilize them against aggregation in complex process environments remains a key challenge to the elusive goal of 100% atom utilization in catalysis. Herein, using a Gd-doped ceria support for atomically dispersed surface Pt atoms, we establish how the combined effects of aliovalent doping and oxygen vacancy generation provide dynamic mechanisms that serve to enhance the stability of supported single-atom configurations. Using correlated, in situ X-ray absorption, photoelectron, and vibrational spectroscopy methods for the analysis of samples on the two types of support (with and without Gd doping), we establish that the Pt atoms are located proximal to Gd dopants, forming a speciation that serves to enhance the thermal stability of Pt atoms against aggregation.

Original languageEnglish (US)
Pages (from-to)52736-52742
Number of pages7
JournalACS Applied Materials and Interfaces
Volume13
Issue number44
DOIs
StatePublished - Nov 10 2021

Keywords

  • aliovalent doping
  • catalysis
  • metal-support
  • single atom
  • vacancies

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Aliovalent Doping of CeO<sub>2</sub>Improves the Stability of Atomically Dispersed Pt'. Together they form a unique fingerprint.

Cite this