Results 111 to 120 of about 515 (139)

Production of Magnetic Nanopowders by Pulsed Sonoelectrochemistry

MRS Proceedings, 1996
ABSTRACTSonoelectrochemistry, or pulsed electrodeposition at high current density in presence of high intensity ultrasound, is used to produce magnetic powders with a mean diameter in the range of 100 nm. Pure iron, cobalt and nickel powders are produced together with their binary and ternary alloys.
Delplancke, Jean-Luc, Bouesnard, Olivier, Reisse, Jacques, Winand, René   +3 more
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Cavitation, Shock Waves and the Invasive Nature of Sonoelectrochemistry

The Journal of Physical Chemistry B, 2005
The invasive nature of electrodes placed into sound fields is examined. In particular, perturbations of the sound field due to the presence of the electrode support are explored. The effect of an electrode on the drive sound field (at approximately 23 kHz) is shown to be negligible under the conditions investigated in this paper. However, scattering of
Birkin, Peter R., Offin, Douglas G., Joseph, Phillip F., Leighton, Timothy G.   +3 more
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Iron–chromium alloy nanoparticles produced by pulsed sonoelectrochemistry: Synthesis and characterization

Acta Materialia, 2010
Abstract This study describes synthesis of Fe–Cr alloy nanoparticles by using a method which couples electrodeposition of metals with the employment of high power ultrasound. The production of alloyed nanoparticles was performed using a 20 kHz titanium alloy horn ultrasound generator, a “sonoelectrode” generating short current pulses ( t ON ...
ZIN, VALENTINA, DABALA', MANUELE
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Sonoelectrochemistry in aqueous electrolyte: A new type of sonoelectroreactor

Electrochimica Acta, 1994
Abstract A new type of sonoelectroreactor is presented. Its most interesting characteristic is the nature of the working electrode which is made up of the immersed titanium horn itself (anode or cathode). The frequency of the home-made reactor is around 20 kHz. The performances of this sonoelectroreactor are tested during the copper electrodeposition.
Reisse, Jacques, François, Hélène, Vandercammen, Juliana, Fabre, Omer, Kirsch-De Mesmaeker, Andrée, Maerschalk, Claude Michel, Delplancke, Jean-Luc   +6 more
openaire   +1 more source

Thin Layer Sonoelectrochemistry in Aqueous and Non-Aqueous Systems

ECS Meeting Abstracts, 2016
In thin layer sonoelectrochemistry, ultrasonic sound waves introduced into an electrolyte layer increases the rates of heterogeneous processes [1, 2]. From previous studies of thin layer sonoelectrochemistry, the rates of heterogeneous electron transfer, oxygen reduction reaction (ORR), and methanol electrolysis were facilitated under sonication.
Nadeesha Rathuwadu, Patrick Dey, Johna Leddy   +2 more
openaire   +1 more source

Catalysis of the Oxygen Reduction Reaction: Thin Layer Sonoelectrochemistry

ECS Meeting Abstracts, 2014
The oxygen reduction reaction (ORR) is a multi-electron and -proton transfer mechanism. In acidic solution, the slow step is typically taken as the first electron transfer. O2 + e + H+ ⇌HO2 Even with platinum electrocatalysts, ORR kinetics impose parasitic losses of ~30 % in proton exchange membrane (PEM ...
Chester G Duda, Johna Leddy
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Solvent Impacts in Thin Layer Sonoelectrochemistry (TLS)

ECS Meeting Abstracts
Thin layer sonoelectrochemistry is established when the wavelength 𝛌 of an ultrasonic transducer is comparable to the distance L between the sonicator and the electrode. A thin fluid layer of electrolyte separates the sonicator and electrode. Under these conditions, constructive interference is established to amplify sound pressure selectively at ...
Nadeesha P. P. W. Rathuwadu, Daniel L. Parr, Johna Leddy   +2 more
openaire   +1 more source

Sonoelectrochemistry

Ultrasonics, 1990
T.J. Mason, J.P. Lorimer, D.J. Walton
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What to Know about Thin Layer Sonoelectrochemistry (TLS)

ECS Meeting Abstracts
Sonochemistry is typically undertaken in bulk fluids where irradiation with ultrasound generates cavitation. On collapse of cavitation voids, high temperature and pressure excursions deposit energy at at the narrow interface between the fluid and the void. Reaction rates increase as the fluid heats, but cavitation introduces turbulence that disrupts
Daniel L. Parr, Chester G. Duda, Johna Leddy   +2 more
openaire   +1 more source

Sonoelectrochemistry

1996
David J. Walton, Sukhvinder S. Phull
openaire   +1 more source