Journal
ACS CATALYSIS
Volume 6, Issue 9, Pages 6151-6155Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.6b00677
Keywords
CO oxidation; metal-support interaction; in situ X-ray absorption spectroscopy; platinum cerium oxide catalyst; heterogeneous catalysis
Categories
Ask authors/readers for more resources
Platinum nanoparticles dispersed on nanosized ceria are active for CO oxidation at room temperature after hydrogen pretreatment. High angular annular dark field scanning transmission electron microscopy (HAADF-STEM) analysis of the reduced catalyst shows spreading of the 1 nm sized platinum particles under the electron beam, characteristic for a two-dimensional strong metal support interaction. In situ X-ray absorption fluorescence spectroscopy (XAFS) reveals a Pt-O distance of 2.1 angstrom, which is significantly longer than the Pt-O distance in PtO2 (2.0 angstrom). This elongated Pt-O distance can be related to interaction of the platinum species with cerium oxide in the form of a low-temperature active species support interaction. These findings contribute to the general understanding of catalytic systems operating at low temperature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available