Components of Charge and Potential in the Non-diffuse Region of the Electrical Double Layer: Potassium Iodide Solutions in Contact with Mercury at 25°1

1958 ◽  
Vol 80 (16) ◽  
pp. 4201-4210 ◽  
Author(s):  
David C. Grahame
Keyword(s):  
Double Layer ◽  
Potassium Iodide ◽  
Electrical Double Layer ◽  
Diffuse Region

Modeling the Electrical Double Layer to Understand the Reaction Environment in a CO2 Electrocatalytic System

2019 ◽  
Author(s):  
Divya Bohra ◽  
Jehanzeb Chaudhry ◽  
Thomas Burdyny ◽  
Evgeny Pidko ◽  
wilson smith
Keyword(s):  
Electric Field ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Surface Reaction ◽  
Catalyst Surface ◽  
Local Reaction ◽  
Reaction Diffusion ◽  
Alkali Metal Cations ◽  
Applied Potential ◽  
Critical Aspect

<p>The environment of a CO<sub>2</sub> electroreduction (CO<sub>2</sub>ER) catalyst is intimately coupled with the surface reaction energetics and is therefore a critical aspect of the overall system performance. The immediate reaction environment of the electrocatalyst constitutes the electrical double layer (EDL) which extends a few nanometers into the electrolyte and screens the surface charge density. In this study, we resolve the species concentrations and potential profiles in the EDL of a CO<sub>2</sub>ER system by self-consistently solving the migration, diffusion and reaction phenomena using the generalized modified Poisson-Nernst-Planck (GMPNP) equations which include the effect of volume exclusion due to the solvated size of solution species. We demonstrate that the concentration of solvated cations builds at the outer Helmholtz plane (OHP) with increasing applied potential until the steric limit is reached. The formation of the EDL is expected to have important consequences for the transport of the CO<sub>2</sub> molecule to the catalyst surface. The electric field in the EDL diminishes the pH in the first 5 nm from the OHP, with an accumulation of protons and a concomitant depletion of hydroxide ions. This is a considerable departure from the results obtained using reaction-diffusion models where migration is ignored. Finally, we use the GMPNP model to compare the nature of the EDL for different alkali metal cations to show the effect of solvated size and polarization of water on the resultant electric field. Our results establish the significance of the EDL and electrostatic forces in defining the local reaction environment of CO<sub>2</sub> electrocatalysts.</p>

Electrical Double Layer Formation on Glassy Carbon in Aqueous Solution

2021 ◽  
pp. 138416
Author(s):  
Sofia B. Davey ◽  
Amanda P. Cameron ◽  
Kenneth G. Latham ◽  
Scott W. Donne
Keyword(s):  
Aqueous Solution ◽  
Double Layer ◽  
Glassy Carbon ◽  
Electrical Double Layer ◽  
Layer Formation

Enzyme Immobilization Behavior on the Surface of Hydroxyapatite Capsules under Alkaline Condition

2018 ◽  
Vol 782 ◽  
pp. 21-26
Author(s):  
Takeshi Yabutsuka ◽  
Masaya Yamamoto ◽  
Shigeomi Takai ◽  
Takeshi Yao
Keyword(s):  
Enzyme Immobilization ◽  
Double Layer ◽  
Isoelectric Point ◽  
Electrical Double Layer ◽  
Alkaline Condition ◽  
Bicarbonate Buffer

We prepared hydroxyapatite (HA) capsules encapsulating maghemite particles. In order to evaluate enzyme immobilization behavior of the HA capsules under alkaline condition, we immobilized five kinds of enzymes with different isoelectric point in carbonate/bicarbonate buffer (CBB, pH 10.0). When the enzymes in CBB were moderately charged, immobilization efficiency on the HA capsules showed the highest value. It was suggested that immobilization efficiency was affected according to both pI of enzyme and pH of the surrounding solution and that enzyme immobilized on the HA capsules by not only electrical double layer interactions but also ion interaction and other interactions.

Electrical Double Layer Structure at Bi(111)|1-ethyl-3-methyl-imidazolium Tetrafluoroborate Interface

2019 ◽  
Vol 16 (49) ◽  
pp. 559-567 ◽  
Author(s):  
Liis Siinor ◽  
Karmen Lust ◽  
Enn Lust
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Layer Structure ◽  
Double Layer Structure

Electrical double layer in ionic liquids: Structural transitions from multilayer to monolayer structure at the interface

2013 ◽  
Vol 110 ◽  
pp. 762-771 ◽  
Author(s):  
K. Kirchner ◽  
T. Kirchner ◽  
V. Ivaništšev ◽  
M.V. Fedorov
Keyword(s):  
Ionic Liquids ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Structural Transitions

scholarly journals A Rapid Detection of COVID‐19 Viral RNA in Human Saliva Using Electrical Double Layer‐Gated Field‐Effect Transistor‐Based Biosensors

2021 ◽  
pp. 2100842
Author(s):  
Akhil K. Paulose ◽  
Chih‐Cheng Huang ◽  
Po‐Hsuan Chen ◽  
Adarsh Tripathi ◽  
Pin‐Hsuan Chen ◽  
...  
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Rapid Detection ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Human Saliva ◽  
Viral Rna ◽  
Effect Transistor

scholarly journals Poly(a)morphic portrait of the electrical double layer in ionic liquids

2014 ◽  
Vol 48 ◽  
pp. 61-64 ◽  
Author(s):  
V. Ivaništšev ◽  
S. O’Connor ◽  
M.V. Fedorov
Keyword(s):  
Ionic Liquids ◽  
Double Layer ◽  
Electrical Double Layer

A three‐component model of the electrical double layer

1992 ◽  
Vol 97 (1) ◽  
pp. 494-503 ◽  
Author(s):  
Zixiang Tang ◽  
L. E. Scriven ◽  
H. T. Davis
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Component Model
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