A novel magnetoelectrolytic reactor

Ismail, M. I.; Fahidy, T. Z.

doi:10.1002/cjce.5450570613

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…Under carefully chosen conditions the following effects can be promoted: (i) a more uniform deposit morphology (microscopic as well as macroscopic) [27,31,33,39,[40][41][42][43], (ii) inhibition of dendrite growth [37,44], (iii) change in macrostress of the deposit [45], (iv) increased hardness of the deposit [29,41,46], (v) a more uniform current distribution [47,48], (vi) increased corrosion resistance [28,29] and (vii) composition shift in alloy plating [46].…”

Section: Cathodic Deposit Morphology Effectsmentioning

confidence: 99%

Applications of magnetoelectrolysis

1995

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A broad overview of research on the effects of imposed magnetic fields on electrolytic processes is given. As well as modelling of mass transfer in magnetoelectrolytic cells, the effect of magnetic fields on reaction kinetics is discussed. Interactions of an imposed magnetic field with cathodic crystallization and anodic dissolution behaviour of metals are also treated. These topics are described from a practical point of view.

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Section: Cathodic Deposit Morphology Effectsmentioning

confidence: 99%

Applications of magnetoelectrolysis

1995

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“…The flow that results from F MHD is generally referred to as a magnetohydrodynamic (MHD) flow. MHD flows are readily observed in both uniform and nonuniform magnetic fields and are being investigated in several laboratories. − Our laboratory has very recently demonstrated that MHD flows can be generated in nanoliter volumes of solution adjacent to the surface of a disk-shaped ultramicroelectrode (UME) and that this flow results in a significant enhancement or diminishment of the electrochemical current. − …”

Section: Introductionmentioning

confidence: 99%

Electrochemically Generated Magnetic Forces. Enhanced Transport of a Paramagnetic Redox Species in Large, Nonuniform Magnetic Fields

1998

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Electrochemically generated magnetic forces at a disk-shaped ultramicroelectrode have been investigated in large, nonuniform magnetic fields. Two sources of magnetic force are simultaneously operative in the electrochemical experiment, both having a significant influence on molecular transport of the electrochemical reactants and products. First, the magnetohydrodynamic (MHD) force, F MHD, described by the Lorentz equation, arises from the diffusion of electrogenerated ions in the magnetic field. The magnitude of F MHD is dependent upon the strength and orientation of the magnetic field. Second, the gradient magnetic force, F ∇ B, which is proportional to the gradient of the magnetic field, arises from electrogeneration of paramagnetic molecules in a nonuniform magnetic field. F ∇ B is dependent on the magnetic field strength, its spatial gradient, and the magnetic properties of the redox-active molecules. F ∇ B and F MHD may be experimentally decoupled and investigated by variation of the field homogeneity and the electrode orientation. Specifically, F MHD is negligibly small when the surface of the ultramicroelectrode is oriented perpendicular to the magnetic field, thus allowing F ∇ B to be investigated without interference from magnetohydrodynamic flows. Order-of-magnitude theoretical estimates of F MHD and F ∇ B are correlated with voltammetric data for the electrochemical reduction of nitrobenzene at a 25-μm-radius Pt microdisk electrode in a superconducting cryomagnet. Enhancements in the voltammetric limiting current as large as ∼400% (B = 9.4 T, ∇B = 0 T/m) and ∼100% (B = 6 T, ∇B ∼ 75 T/m) are associated with F MHD and F ∇ B, respectively.

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“…Conditions of 3D-gradient fields can easily be generated for instance in large-scale electrolytic cells by inclined electrodes 102,103 and a solenoidal-type winding of cables carrying electric current. In Cartesian coordinates, the magnitude of the magnetic flux density at an arbitrary (x, y, z) coordinate position in the cell is given by the modulus equation where the subscripted variables denote the flux-density vector components in the indicated spatial directions.…”

Section: Magnetoelectrolytic Mass Transport In a Magnetic Field Gradientmentioning

confidence: 99%

The Effect of Magnetic Fields on Electrochemical Processes

Fahidy

Modern Aspects of Electrochemistry

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A novel magnetoelectrolytic reactor

Cited by 12 publications

References 3 publications

Applications of magnetoelectrolysis

Applications of magnetoelectrolysis

Electrochemically Generated Magnetic Forces. Enhanced Transport of a Paramagnetic Redox Species in Large, Nonuniform Magnetic Fields

The Effect of Magnetic Fields on Electrochemical Processes

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