| AVS 55th International Symposium & Exhibition | |
| Surface Science | Friday Sessions |
| Session SS+AS+NC-FrM |
| Session: | Environmental Surfaces and Water Interaction with Oxide Surfaces |
| Presenter: | G.S. Parkinson, Pacific Northwest National Laboratory |
| Authors: | G.S. Parkinson, Pacific Northwest National Laboratory Z. Dohnálek, Pacific Northwest National Laboratory R.S. Smith, Pacific Northwest National Laboratory B.D. Kay, Pacific Northwest National Laboratory |
| Correspondent: | Click to Email |
There is currently much interest in the development of Fe0 nanoparticles as an agent for the destruction of chlorinated hydrocarbons in environmental remediation applications. However, the fundamental reaction pathways for the interaction of nano-Fe0 with such target molecules is unknown, and this presents a major obstacle to the design of improved particles. Our work utilizes a novel “atom dropping” technique where Fe0 atoms, clusters and nanoparticles are deposited into CCl4 multilayers on FeO(111) at 30 K in ultra-high vacuum. A series of temperature programmed desorption and X-ray photoelectron spectroscopy experiments will be described which demonstrate an interesting size effect whereby isolated atoms and small clusters exhibit markedly different reactivity and product branching ratio to nanoparticles. The results will be discussed in the context of relevant theoretical calculations and the reaction pathways identified. The research described here was performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.