Formation, Stability, and Reactivity of atomically dispersed transition metals stabilized on oxide supports
EMSL Project ID
47586
Abstract
In the course of our previous studies of supported Pd we learned that the support may be modified during reaction, especially after elevated temperature treatments, due to the incorporation of atomically dispersed transition metals. The Pd/Al2O3 catalyst after high temperature treatment shows exhibits low temperature light off in CO oxidation and Pd/ZnO containing atomically dispersed Pd shows higher reactivity for Methanol Steam Reforming. Aberration corrected STEM (AC-STEM) in conjunction with EXAFS provides convincing evidence of the presence of atomically dispersed Pd atoms on La-stabilized alumina as well as on ZnO. These materials constitute a novel form of metal-support interaction where the metal nanoparticles provide atoms that get anchored on a support and modify its catalytic behavior. The results show that these atomically dispersed species are stable at elevated temperatures, so they may play a significant role in the overall catalytic reactivity. The proposed work will investigate the formation, stability and reactivity of these atomically dispersed transition metal species.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2012-10-01
End Date
2013-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Co-Investigator(s)
Team Members
Related Publications
Gaudet JR, A De La Riva, EJ Peterson, TB Bolin, and AK Datye. 2013. "Improved Low-Temperature CO Oxidation Performance of Pd Supported on La-Stabilized Alumina." ACS Catalysis 3(5):846-855. doi:10.1021/cs400024u