Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres

Wei-Zhen Li, Libor Kovarik, Donghai Mei, Jun Liu, Yong Wang and Charles H. F. Peden ()
Additional contact information
Wei-Zhen Li: Institute for Integrated Catalysis, Pacific Northwest National Laboratory
Libor Kovarik: Institute for Integrated Catalysis, Pacific Northwest National Laboratory
Donghai Mei: Institute for Integrated Catalysis, Pacific Northwest National Laboratory
Jun Liu: Institute for Integrated Catalysis, Pacific Northwest National Laboratory
Yong Wang: Institute for Integrated Catalysis, Pacific Northwest National Laboratory
Charles H. F. Peden: Institute for Integrated Catalysis, Pacific Northwest National Laboratory

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract The development of thermally stable, nanometer-sized precious metal-based catalysts remains a daunting challenge. Such materials, especially those based on the use of costly platinum metal, are essential and, to date, non-replaceable for a large number of industrially important catalytic processes. Here we report a well-defined cuboctahedral MgAl2O4 spinel support material that is capable of stabilizing platinum particles in the range of 1–3 nm on its relatively abundant {111} facets during extremely severe aging at 800 °C in air for 1 week. The aged catalysts retain platinum dispersions of 15.9% with catalytic activities for methanol oxidation being ~80% of that of fresh ones, whereas a conventional Pt/γ-Al2O3 catalyst is severely sintered and nearly inactive. We reveal the origin of the markedly superior ability of spinel {111} facets, resulting from strong interactions between spinel surface oxygens and epitaxial platinum {111} facets, inspiring the rational design of anti-sintering supported platinum group catalysts.

Date: 2013
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms3481 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3481

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms3481

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().