Journal article
Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres
Nature communications, Vol.4(1), pp.2481-2481
2013
Handle:
https://hdl.handle.net/2376/105387
PMID: 24064958
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.
Metrics
17 Record Views
Details
- Title
- Stable platinum nanoparticles on specific MgAl2O4 spinel facets at high temperatures in oxidizing atmospheres
- Creators
- Wei-Zhen Li - Institute for Integrated Catalysis, Pacific Northwest National Laboratory, PO Box 999, Richland, Washington 99352, USALibor KovarikDonghai MeiJun LiuYong WangCharles H F Peden
- Publication Details
- Nature communications, Vol.4(1), pp.2481-2481
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Publisher
- England
- Identifiers
- 99900546669701842
- Language
- English
- Resource Type
- Journal article