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The solvation of electrons by an atmospheric-pressure plasma
Open accessAbstract
Solvated electrons are typically generated by radiolysis or photoionization of solutes. While plasmas containing free electrons have been brought into contact with liquids in studies dating back centuries, there has been little evidence that electrons are solvated by this approach. Here we report direct measurements of solvated electrons generated by an atmospheric-pressure plasma in contact with the surface of an aqueous solution. The electrons are measured by their optical absorbance using a total internal reflection geometry. The measured absorption spectrum is unexpectedly blue shifted, which is potentially due to the intense electric field in the interfacial Debye layer. We estimate an average penetration depth of 2.5±1.0 nm, indicating that the electrons fully solvate before reacting through second-order recombination. Reactions with various electron scavengers including H+, NO 2−, NO 3− and H 2 O 2 show that the kinetics are similar, but not identical, to those for solvated electrons formed in bulk water by radiolysis.
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Buxton, G. V., Greenstock, C. L., Helman, W. P., & Ross, A. B. (1988) · Journal of Physical and Chemical Reference Data · doi:10.1063/1.555805 · Cited by 12,332
Cited by
Hawtof, R., Ghosh, S., Guarr, E., Xu, C., Mohan Sankaran, R., & Renner, J. N. (2019) · Science Advances · doi:10.1126/sciadv.aat5778 · Cited by 319
Managing and treating per‐ and polyfluoroalkyl substances (PFAS) in membrane concentrates
Tow, E. W., Ersan, M. S., Kum, S., Lee, T., Speth, T. F., Owen, C., Bellona, C., Nadagouda, M. N., Mikelonis, A. M., Westerhoff, P., et al. (2021) · AWWA Water Science · doi:10.1002/aws2.1233 · Cited by 146
“…novel approaches for efficient generation of hydrated electrons using plasma technology to overcome the above challenges (Lewis et al., 2020; Rumbach et al., 2015); however, plasma use for this application still remains at an early developmental stage because formation mechanisms of…”
Background
Metadata
- Authors
- Rumbach, P., Bartels, D. M., Sankaran, R. M., & Go, D. B.
- Venue
- Nature Communications
- Published
- 2015-06-19
- Volume
- 6
- Issue
- 1
- Pages
- 7248-7248
- ISSN
- 2041-1723 (ISSN-L)
- OpenAlex
- W927201703
- Cited by
- 341
- References
- 1
- FWCI
- 21.92
- Type
- journal article
- Language
- en
- Open access
- gold
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- Rumbach, P., Bartels, D. M., Sankaran, R. M., & Go, D. B. (2015). The solvation of electrons by an atmospheric-pressure plasma. Nature Communications. https://doi.org/10.1038/ncomms8248
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