The use of oxide-supported isolated Pt-group metal atoms as catalytic active sites is of interest due to their unique reactivity and efficient metal utilization. However, relationships between the structure of these active sites, their dynamic response to environments and catalytic functionality have proved difficult to experimentally establish. Here, sinter-resistant catalysts where Pt was deposited uniformly as isolated atoms in well-defined locations on anatase TiO2 nanoparticle supports were used to develop such relationships. Through a combination of in situ atomic-resolution microscopy- and spectroscopy-based characterization supported by first-principles calculations it was demonstrated that isolated Pt species can adopt a range of local coordination environments and oxidation states, which evolve in response to varied environmental conditions. The variation in local coordination showed a strong influence on the chemical reactivity and could be exploited to control the catalytic performance

Derita, L., Resasco, J., Dai, S., Boubnov, A., Thang, H., Hoffman, A., et al. (2019). Structural evolution of atomically dispersed Pt catalysts dictates reactivity. NATURE MATERIALS, 18(7), 746-751 [10.1038/s41563-019-0349-9].

Structural evolution of atomically dispersed Pt catalysts dictates reactivity

Thang H. V.;Pacchioni G.;
2019

Abstract

The use of oxide-supported isolated Pt-group metal atoms as catalytic active sites is of interest due to their unique reactivity and efficient metal utilization. However, relationships between the structure of these active sites, their dynamic response to environments and catalytic functionality have proved difficult to experimentally establish. Here, sinter-resistant catalysts where Pt was deposited uniformly as isolated atoms in well-defined locations on anatase TiO2 nanoparticle supports were used to develop such relationships. Through a combination of in situ atomic-resolution microscopy- and spectroscopy-based characterization supported by first-principles calculations it was demonstrated that isolated Pt species can adopt a range of local coordination environments and oxidation states, which evolve in response to varied environmental conditions. The variation in local coordination showed a strong influence on the chemical reactivity and could be exploited to control the catalytic performance
Articolo in rivista - Articolo scientifico
single atom catalyst
English
2019
18
7
746
751
reserved
Derita, L., Resasco, J., Dai, S., Boubnov, A., Thang, H., Hoffman, A., et al. (2019). Structural evolution of atomically dispersed Pt catalysts dictates reactivity. NATURE MATERIALS, 18(7), 746-751 [10.1038/s41563-019-0349-9].
File in questo prodotto:
File Dimensione Formato  
DeRita-2019-Nature Mater-VoR.pdf

Solo gestori archivio

Descrizione: Article
Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 2.28 MB
Formato Adobe PDF
2.28 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/260098
Citazioni
  • Scopus 367
  • ???jsp.display-item.citation.isi??? 350
Social impact