Solvent-Independent Electrode Potentials of Solids Undergoing Insertion Electrochemical Reactions: Part III. Experimental Data for Prussian Blue Undergoing Electron Exchange Coupled to Cation Exchange

2012 ◽  
Vol 116 (49) ◽  
pp. 25993-25999 ◽  
Author(s):  
Antonio Doménech-Carbó ◽  
Fritz Scholz ◽  
Noemí Montoya
Keyword(s):  
Experimental Data ◽  
Cation Exchange ◽  
Prussian Blue ◽  
Electron Exchange ◽  
Electrochemical Reactions ◽  
Electrode Potentials

Manipulation of Clinical Materials Using AC Electrokinetics

2010 ◽  
Author(s):  
Mandy L. Y. Sin ◽  
Pak Kin Wong
Keyword(s):  
Experimental Data ◽  
Sample Preparation ◽  
Theoretical Prediction ◽  
Fluid Motion ◽  
Lab On A Chip ◽  
Clinical Samples ◽  
Electrochemical Reactions ◽  
Ac Electrokinetics ◽  
Wide Range ◽  
Electrothermal Flow

AC electrokinetics is a promising approach for sample preparation and reaction enhancement in lab-on-a-chip devices. However, relative little has been done on the electrokinetic manipulation of physiological fluids and buffers with similar properties, such as conductivity. Herein, electrokinetic manipulation of fluids with a wide range of conductivities has been studied as a function of voltage and frequency. AC electrothermal flow is determined to dominate the fluid motion when the applied frequency of the AC potential is above 100 kHz. Interestingly, experimental data deviate from theoretical prediction for fluids with high conductivities (> 1 Sm−1). The deviation can be understood by voltage modulated electrochemical reactions and should be accounted for when manipulating clinical materials with high conductivities. The study will provide useful in sights in designing lab-on-a-chip devices for manipulating clinical samples in the future.

scholarly journals On the Reduction of Ammonia from the Waste of Alpine Houses

2005 ◽  
Vol 23 (1) ◽  
pp. 47-56
Author(s):  
Sameer Al-Asheh ◽  
Franz Bischof
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Langmuir Model ◽  
Suitable Material ◽  
The Alps

An evaluation of the effectiveness of the cation-exchange resin Amberlite IR-120 (AMIR 120) for removing ammonia from aqueous solutions and waste was made. Two types of waste were obtained from houses located in the Alps and used in this work. The results of the study showed that AMIR 120 may be considered as a suitable material for the removal of ammonia from aqueous and waste systems. The amount of ammonia removed increases with increasing AMIR 120 concentration. Sorption of ammonia decreases as the pH of the aqueous solutions increases. The Langmuir model represents the experimental data reasonably well.

scholarly journals Uptake of divalent manganese from aqueous solution using cation exchange resins

2016 ◽  
Vol 12 (4) ◽  
pp. 4312-4323
Author(s):  
Ayman Abdallah Ahmed
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Kinetic Model ◽  
Cation Exchange ◽  
Batch Reactor ◽  
Kinetic Equations ◽  
Correlation Coefficients ◽  
Manganese Removal ◽  
Cation Exchange Resins ◽  
Exchange Resins

The present work deals with the removal of highly toxic manganese ion from aqueous solution using cation exchange resins namely, Amberjet 1500H, Amberjet 1300H and Amberlite IRC86. The study was carried out in media of various ionic strengths (1.98-9.98 mmol/L), different resin dose (0.25-8.0 gm) and a wide solution acidity range (0.001-1.0 M), in addition to at three temperatures (293-318 K).The aim of this study was to understand the mechanisms that govern manganese removal and find a suitable equilibrium isotherm and kinetic model for the manganese removal in a batch reactor. The experimental isotherm data were analyzed using the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D–R) equations. The experimental data were analyzed using four adsorption kinetic models – the pseudo first- and second-order, intraparticle diffusion and the Elovich equations – to determine the best fit equation for the adsorption of manganese ions onto the resins. The rate constants, equilibrium capacities and related correlation coefficients for each kinetic model were calculated and discussed. Also, predicted qt values from the kinetic equations were compared with the experimental data. Thermodynamic parameters, involving ΔH, ΔS and ΔG were also calculated from graphical interpretation of the experimental data

Cation exchange formation of prussian blue analogue submicroboxes for high-performance Na-ion hybrid supercapacitors

Nano Energy ◽  
2017 ◽  
Vol 39 ◽  
pp. 647-653 ◽  
Author(s):  
Jian-Gan Wang ◽  
Zhiyong Zhang ◽  
Xingyuan Zhang ◽  
Xuemin Yin ◽  
Xu Li ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Prussian Blue ◽  
High Performance ◽  
Prussian Blue Analogue ◽  
Hybrid Supercapacitors

scholarly journals Assessment of Constant-Potential Implicit Solvation Calculations of Electrochemical Energy Barriers

2018 ◽  
Author(s):  
Maxime Van den Bossche ◽  
Egill Skúlason ◽  
Christoph Rose-Petruck ◽  
Hannes Jonsson
Keyword(s):  
Experimental Data ◽  
Electrostatic Interactions ◽  
Computational Cost ◽  
Electrochemical Reactions ◽  
Critical Importance ◽  
Theoretical Estimation ◽  
Implicit Solvation ◽  
Solvation Model ◽  
Implicit Solvation Model ◽  
Constant Potential

Theoretical estimation of the activation energy of electrochemical reactions is of critical importance but remains challenging. In this work, we address the usage of an implicit solvation model for describing hydrogen evolution reaction steps on Pt(111) and Pt(110), and compare with the `extrapolation' approach and co-workers as well as single-crystal measurements. We find that both methods yield qualitatively similar results, which are in fair agreement with the experimental data. Care should be taken, however, in addressing spurious electrostatic interactions between periodically repeated slabs in the VASPsol implementation. Considering the lower computational cost and higher flexibility of the implicit solvation approach, we expect this method to become a valuable tool in electrocatalysis.<br>

Complex conductivity tensor of anisotropic hydrocarbon-bearing shales and mudrocks

Geophysics ◽  
2013 ◽  
Vol 78 (6) ◽  
pp. D403-D418 ◽  
Author(s):  
A. Revil ◽  
W. F. Woodruff ◽  
C. Torres-Verdín ◽  
M. Prasad
Keyword(s):  
Experimental Data ◽  
Electrical Conductivity ◽  
Cation Exchange ◽  
Cation Exchange Capacity ◽  
Solid Phase ◽  
Exchange Capacity ◽  
Electrical Anisotropy ◽  
Dielectric Tensor ◽  
Two Samples ◽  
Complex Electrical Conductivity

A model was recently introduced to describe the complex electrical conductivity and high-frequency dielectric constant of isotropic clayey porous materials. We generalized that approach to the case of anisotropic and tight hydrocarbon-bearing shales and mudrocks by introducing tensorial versions of formation factor and tortuosity. In-phase and quadrature conductivity tensors have common eigenvectors, but the eigenvectors of the dielectric tensor may be different due to influence of the solid phase at high frequencies. In-phase and quadrature contributions to complex electrical conductivity depend on saturation, salinity, porosity, temperature, and cation exchange capacity (alternatively, specific surface area) of the porous material. Kerogen is likely to have a negligible contribution to the cation exchange capacity of the material because all exchangeable sites in the functional groups of organic matter may have been polymerized during diagenesis. An anisotropic experiment is performed to validate some of the properties described by the proposed model, especially to verify that the electrical anisotropy factor is the same for in-phase and quadrature conductivities. We used two samples from the Bakken formation. Experimental data confirm the validity of the model. Also, the range of values for cation exchange capacity determined when implementing the new model with experimental data agree with the known range of cation exchange capacity for the Bakken shale. Measurements indicate that the bulk-space tortuosity in the direction normal to bedding plane can be higher than 100.

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