Trapped in the coordination sphere: Nitrate ion transfer driven by the cerium(III/IV) redox couple
Abstract
Redox-driven ion transfer between phases underpins many biological and technological processes, including industrial separation of ions. Here we investigate the electrochemical transfer of nitrate anions between oil and water phases, driven by the reduction and oxidation of cerium coordination complexes in oil phases. We find that the coordination environment around the cerium cation has a pronounced impact on the overall redox potential, particularly with regard to the number of coordinated nitrate anions. Our results suggest a new fundamental mechanism for tuning ion transfer between phases; by 'trapping' the migrating ion inside the coordination sphere of a redox-active complex. Here, this presents a new route for controlling anion transfer in electrochemically-driven separation applications.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1364644
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Chemistry Chemical Physics. PCCP (Print)
- Additional Journal Information:
- Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 18; Journal Issue: 45; Journal ID: ISSN 1463-9076
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; X-ray absorption spectroscopy; phase transfer; solvent extraction; three-phase electrode voltammetry
Citation Formats
Ellis, Ross J., Bera, Mrinal K., Reinhart, Benjamin, and Antonio, Mark R. Trapped in the coordination sphere: Nitrate ion transfer driven by the cerium(III/IV) redox couple. United States: N. p., 2016.
Web. doi:10.1039/C6CP06528G.
Ellis, Ross J., Bera, Mrinal K., Reinhart, Benjamin, & Antonio, Mark R. Trapped in the coordination sphere: Nitrate ion transfer driven by the cerium(III/IV) redox couple. United States. https://doi.org/10.1039/C6CP06528G
Ellis, Ross J., Bera, Mrinal K., Reinhart, Benjamin, and Antonio, Mark R. Mon .
"Trapped in the coordination sphere: Nitrate ion transfer driven by the cerium(III/IV) redox couple". United States. https://doi.org/10.1039/C6CP06528G. https://www.osti.gov/servlets/purl/1364644.
@article{osti_1364644,
title = {Trapped in the coordination sphere: Nitrate ion transfer driven by the cerium(III/IV) redox couple},
author = {Ellis, Ross J. and Bera, Mrinal K. and Reinhart, Benjamin and Antonio, Mark R.},
abstractNote = {Redox-driven ion transfer between phases underpins many biological and technological processes, including industrial separation of ions. Here we investigate the electrochemical transfer of nitrate anions between oil and water phases, driven by the reduction and oxidation of cerium coordination complexes in oil phases. We find that the coordination environment around the cerium cation has a pronounced impact on the overall redox potential, particularly with regard to the number of coordinated nitrate anions. Our results suggest a new fundamental mechanism for tuning ion transfer between phases; by 'trapping' the migrating ion inside the coordination sphere of a redox-active complex. Here, this presents a new route for controlling anion transfer in electrochemically-driven separation applications.},
doi = {10.1039/C6CP06528G},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
number = 45,
volume = 18,
place = {United States},
year = {Mon Nov 07 00:00:00 EST 2016},
month = {Mon Nov 07 00:00:00 EST 2016}
}
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