Ab initio molecular dynamics study of an aqueous NaCl solution under an electric field
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F16%3A00470670" target="_blank" >RIV/68081707:_____/16:00470670 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1039/c6cp03926j" target="_blank" >http://dx.doi.org/10.1039/c6cp03926j</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c6cp03926j" target="_blank" >10.1039/c6cp03926j</a>
Alternative languages
Result language
angličtina
Original language name
Ab initio molecular dynamics study of an aqueous NaCl solution under an electric field
Original language description
We report on an ab initio molecular dynamics study of an aqueous NaCl solution under the effect of static electric fields. We found that at low-to-moderate field intensity regimes chlorine ions have a greater mobility than sodium ions which, being a sort of "structure makers'', are able to drag their own coordination shells. However, for field strengths exceeding 0.15 V angstrom(-1) the mobility of sodium ions overcomes that of chlorine ions as both types of ions do actually escape from their respective hydration cages. The presence of charged particles lowers the water dissociation threshold (i.e., the minimum field strength which induces a transfer of protons) from 0.35 V angstrom(-1) to 0.25 V angstrom(-1); moreover, a protonic current was also recorded at the estimated dissociation threshold of the solution. The behaviour of the current-voltage diagram of the protonic response to the external electric field is Ohmic as in pure water, with a resulting protonic conductivity of about 2.5 S cm(-1). This value is approximately one third of that estimated in pure water (7.8 S cm(-1)), which shows that the partial breaking of hydrogen bonds induced by the solvated ions hinders the migration of protonic defects. Finally, the conductivity of Na+ and Cl- ions (0.2 S cm(-1))is in fair agreement with the available experimental data for a solution molarity of 1.7 M.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BO - Biophysics
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Chemistry Chemical Physics
ISSN
1463-9076
e-ISSN
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Volume of the periodical
18
Issue of the periodical within the volume
33
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
23164-23173
UT code for WoS article
000382109300043
EID of the result in the Scopus database
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