Experimental Studies of Fundamental Molecule-Particle Interactions and Reactions on Iron Metal and Oxide Surfaces
EMSL Project ID
24808
Abstract
Metal oxides constitute an important class of materials and are used in a wide range of catalytic and environmental science applications. In environmental applications, oxides are primarily used to alter or immobilize environmentally harmful pollutants. In particular metal-oxide nanoparticles have been shown to have high reactivity towards a variety of chemical species, including chlorinated hydrocarbons and reducible oxyanions that frequently contaminate ground water at DOE and other government and industrial sites. Of particular interest are nanoparticles of iron metal and iron oxide (made up of Fe (II) and Fe (III) species) because of the their potential reactivity with chlorinated hydrocarbons.
The optimization of the activity of an oxide for a particular chemical application requires an understanding of the factors that control its reactivity. The role the oxidation state of the metal, coordination of the metal at a particular surface site, and the surface orientation play in the reactivity of the oxide is very often unknown. As a consequence, obtaining a fundamental understanding of the individual reaction steps is difficult. Our approach is to study these reactions under controlled experimental conditions on various surfaces and phases of a given oxide in order to unravel the factors that determine particular structure-reactivity relationships.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2007-05-31
End Date
2010-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
G. S. Parkinson, Y. K. Kim, Z. Dohnalek, R. S. Smith, and B. D. Kay, Journal of Physical Chemistry C 113 (12), 4960 (2009).
G. S. Parkinson, Z. Dohnalek, R. S. Smith, and B. D. Kay, Journal of Physical Chemistry C 113 (23), 10233 (2009).
G. S. Parkinson, Z. Dohnalek, R. S. Smith, and B. D. Kay, Journal of Physical Chemistry C 113 (5), 1818 (2009).
Parkinson GS, Z Dohnalek, RS Smith, and BD Kay. 2010. "Reactivity of Fe0 Atoms with mixed CCI4 and D2O films over FeO (111)." Journal of Physical Chemistry C 114(40):17136-17141. doi:10.1021/jp103896k.