Kosmotropic Electrolyte (Na2CO3, NaF) Perturbs the Air/Water Interface through Anion Hydration Shell without Forming a Well-Defined Electric Double Layer

2021 ◽  
Vol 125 (16) ◽  
pp. 3977-3985
Author(s):  
Subhadip Roy ◽  
Jahur Alam Mondal
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Hydration Shell ◽  
Water Interface ◽  
Air Water Interface ◽  
Anion Hydration

Electric Double Layer at Metal Oxide Surfaces:  Static Properties of the Cassiterite−Water Interface

Langmuir ◽  
2007 ◽  
Vol 23 (9) ◽  
pp. 4925-4937 ◽  
Author(s):  
Lukas Vlcek ◽  
Zhan Zhang ◽  
Mike L. Machesky ◽  
Paul Fenter ◽  
Jorgen Rosenqvist ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Double Layer ◽  
Electric Double Layer ◽  
Oxide Surfaces ◽  
Water Interface ◽  
Static Properties ◽  
Metal Oxide Surfaces

scholarly journals Stripping off of the Hydration Shells in the Double Layer Formation: Water Networks Matter

2021 ◽  
Author(s):  
Serena Rosa Alfarano ◽  
Simone Pezzotti ◽  
Christopher Stein ◽  
Zhou Lin ◽  
federico sebastiani ◽  
...  
Keyword(s):  
Double Layer ◽  
Hydration Shell ◽  
Thz Spectroscopy ◽  
Layer Formation ◽  
Hydration Shells ◽  
Synchrotron Light ◽  
In Operando ◽  
Dynamics Simulations ◽  
Anion Hydration ◽  
Structure Calculations

<div><br></div><div><p>The double layer at the solid/electrolyte interface is a key concept in electrochemistry. Here, we present an experimental study combined with simulations, which provides a molecular picture of the double-layer formation in operando processes. By THz spectroscopy we are able to follow the stripping off of the cation/anion hydration shells for a NaCl electrolyte at the Au surface when decreasing/increasing the bias potential. While Na<sup>+</sup> is attracted toward the electrode already at the smallest applied negative potentials, stripping-off of the Cl<sup>-</sup> hydration shell is observed only at higher potential values. These phenomena are directly measured by in operando THz spectroscopy with ultra-bright synchrotron light as a source and rationalized by accompanying molecular-dynamics simulations and electronic-structure calculations. </p></div>

scholarly journals Stripping off of the Hydration Shells in the Double Layer Formation: Water Networks Matter

2021 ◽  
Author(s):  
Serena Rosa Alfarano ◽  
Simone Pezzotti ◽  
Christopher Stein ◽  
Zhou Lin ◽  
federico sebastiani ◽  
...  
Keyword(s):  
Double Layer ◽  
Hydration Shell ◽  
Thz Spectroscopy ◽  
Layer Formation ◽  
Hydration Shells ◽  
Synchrotron Light ◽  
In Operando ◽  
Dynamics Simulations ◽  
Anion Hydration ◽  
Structure Calculations

<div><br></div><div><p>The double layer at the solid/electrolyte interface is a key concept in electrochemistry. Here, we present an experimental study combined with simulations, which provides a molecular picture of the double-layer formation in operando processes. By THz spectroscopy we are able to follow the stripping off of the cation/anion hydration shells for a NaCl electrolyte at the Au surface when decreasing/increasing the bias potential. While Na<sup>+</sup> is attracted toward the electrode already at the smallest applied negative potentials, stripping-off of the Cl<sup>-</sup> hydration shell is observed only at higher potential values. These phenomena are directly measured by in operando THz spectroscopy with ultra-bright synchrotron light as a source and rationalized by accompanying molecular-dynamics simulations and electronic-structure calculations. </p></div>

Accumulation of counterions and coions evaluated by cryogenic XPS as a new tool for describing the structure of electric double layer at the silica/water interface

2017 ◽  
Vol 19 (43) ◽  
pp. 29047-29052 ◽  
Author(s):  
Jiří Škvarla ◽  
Mária Kaňuchová ◽  
Andrey Shchukarev ◽  
Ivan Brezáni ◽  
Juraj Škvarla
Keyword(s):  
Double Layer ◽  
Photoelectron Spectroscopy ◽  
Electric Double Layer ◽  
Liquid Interface ◽  
New Method ◽  
Water Interface ◽  
Spectroscopy Technique ◽  
X Ray ◽  
Solid Liquid Interface ◽  
Solid Liquid

We introduce a new method of evaluating the structure of electric double layer (EDL) at the native solid/liquid interface using cryogenic X-ray photoelectron spectroscopy technique.

scholarly journals Stripping away ion hydration shells in electrical double-layer formation: Water networks matter

2021 ◽  
Vol 118 (47) ◽  
pp. e2108568118
Author(s):  
Serena R. Alfarano ◽  
Simone Pezzotti ◽  
Christopher J. Stein ◽  
Zhou Lin ◽  
Federico Sebastiani ◽  
...  
Keyword(s):  
Double Layer ◽  
Hydration Shell ◽  
Thz Spectroscopy ◽  
Layer Formation ◽  
Ion Hydration ◽  
Hydration Shells ◽  
Synchrotron Light ◽  
Dynamics Simulations ◽  
Anion Hydration ◽  
Structure Calculations

The double layer at the solid/electrolyte interface is a key concept in electrochemistry. Here, we present an experimental study combined with simulations, which provides a molecular picture of the double-layer formation under applied voltage. By THz spectroscopy we are able to follow the stripping away of the cation/anion hydration shells for an NaCl electrolyte at the Au surface when decreasing/increasing the bias potential. While Na+ is attracted toward the electrode at the smallest applied negative potentials, stripping of the Cl− hydration shell is observed only at higher potential values. These phenomena are directly measured by THz spectroscopy with ultrabright synchrotron light as a source and rationalized by accompanying molecular dynamics simulations and electronic-structure calculations.

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