<div class="csl-bib-body">
<div class="csl-entry">Hu, Q., Weber, C., Cheng, H.-W., Renner, F. U., & Valtiner, M. (2017). Anion layering and steric hydration repulsion on positively charged surfaces in aqueous electrolytes. <i>ChemPhysChem</i>, <i>18</i>(21), 3056–3065. https://doi.org/10.1002/cphc.201700865</div>
</div>
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dc.identifier.issn
1439-4235
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/78
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dc.description
The final publication is available via <a href="https://doi.org/10.1002/cphc.201700865" target="_blank">https://doi.org/10.1002/cphc.201700865</a>.
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dc.description.abstract
The molecular structure at charged solid/liquid interfaces is vital for many chemical or electrochemical processes, such as adhesion, catalysis, or the stability of colloidal dispersions. How cations influence structural hydration forces and interactions across negatively charged surfaces has been studied in great detail. However, how anions influence structural hydration forces on positively charged surfaces is much less understood. Herein we report force versus distance profiles on freshly cleaved mica using atomic force microscopy with silicon tips. We characterize steric anion hydration forces for a set of common anions (Cl−, ClO4−, NO3−, SO42− and PO43−) in pure acids at pH ≈1, where protons are the co‐ions. Solutions containing anions with low hydration energies exhibit repulsive structural hydration forces, indicating significant ion and/or water structuring within the first 1–2 nm on a positively charged surface. We attribute this to specific adsorption effects within the Stern layer. In contrast, ions with high hydration energies show exponentially repulsive hydration forces, indicating a lower degree of structuring within the Stern layer. The presented data demonstrates that anion hydration forces in the inner double layer are comparable to cation hydration forces, and that they qualitatively correlate with hydration free energies. This work contributes to understanding interaction processes in which positive charge is screened by anions within an electrolyte.
en
dc.description.sponsorship
Deutsche Forschungsgemeinschaft (DFG)
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dc.description.sponsorship
European Research Council (ERC)
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dc.language
English
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dc.language.iso
en
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dc.publisher
WILEY-V C H VERLAG GMBH
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dc.relation.ispartof
ChemPhysChem
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
atomic force microscopy
en
dc.subject
anions
en
dc.subject
hydration forces
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dc.subject
mica
en
dc.subject
water layering
en
dc.title
Anion layering and steric hydration repulsion on positively charged surfaces in aqueous electrolytes
en
dc.type
Article
en
dc.type
Artikel
de
dc.rights.license
Urheberrechtsschutz
de
dc.rights.license
In Copyright
en
dc.contributor.affiliation
Max-Planck-Institut für Eisenforschung GmbH, Germany
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dc.contributor.affiliation
TU Bergakademie Freiberg, Germany
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dc.contributor.affiliation
Max-Planck-Institut für Eisenforschung GmbH, Germany
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dc.contributor.affiliation
Hasselt University, Belgium
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dc.description.startpage
3056
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dc.description.endpage
3065
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dc.relation.grantno
EXC 1069
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dc.relation.grantno
677663
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dc.rights.holder
2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
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dc.type.category
Original Research Article
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tuw.container.volume
18
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tuw.container.issue
21
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
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tuw.version
smur
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dcterms.isPartOf.title
ChemPhysChem
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tuw.publication.orgunit
E134 - Institut für Angewandte Physik
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tuw.publisher.doi
10.1002/cphc.201700865
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dc.identifier.eissn
1439-7641
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dc.identifier.libraryid
AC15314143
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dc.identifier.urn
urn:nbn:at:at-ubtuw:3-4678
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tuw.author.orcid
0000-0001-5410-1067
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dc.rights.identifier
Urheberrechtsschutz
de
dc.rights.identifier
In Copyright
en
item.fulltext
with Fulltext
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
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item.languageiso639-1
en
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item.openaccessfulltext
Open Access
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item.openairetype
research article
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item.grantfulltext
open
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crisitem.author.dept
Max-Planck-Institut für Eisenforschung GmbH, Germany