Electrochemical dissolution of nickel in sulphuric acid by alternating current

Deo, K.; Mehendale, S. G.; Venkatachalam, S.

doi:10.1007/bf01058868

Cited by 9 publications

(4 citation statements)

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“…Electrodeposition under periodic reaction control at mass-transfer-limited conditions has also received attention (32)(33)(34)(35)(36)(37). In addition, it has been shown that electrodissolution efficiency may be increased under periodic current control (38,39) and corrosion characteristics may be modified (40,41).…”

Section: Periodic Control Of Reaction Ratesmentioning

confidence: 99%

Selectivity Changes in Electrochemical Reaction Sequences by Modulated Potential Control

Fedkiw

Scott

1984

J. Electrochem. Soc.

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Electro-organic reactions typically involve the electrochemical generation of a reactive intermediate which may participate in further chemical or electrochemical reactions. It is possible to effect the product distribution in such branched reaction networks by modulating the electrode potential. Reaction rate calculations under electrokineticcontrolled conditions for four reaction mechanisms, each involving an electrogenerated intermediate, are presented for step-and sinusoidal-potential modulation. The results show that reactor operating conditions unobtainable under steady potential control are possible. The cycle-averaged selectivity and yield of selected products may be significantly increased at the stationary state in comparison to those at an identical production rate but under dc conditions. The effect of modulation is frequency dependent; for some reaction sequences, the reaction trend at low frequency may be opposite than that at high frequency. The relative rates of a chemical reaction in parallel with an electrochemical reaction, both involving the intermediate, are more sensitive to potential modulation than either two parallel chemical or electrochemical reactions. Mass transfer limitations dampen the results of modulation. Reactor performance increases under modulated potential (or current) control possibly may be significant enough to make an electrochemical processing route economically viable. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 147.188.128.74 Downloaded on 2014-11-16 to IP Vol. 131, No. 6 ELECTROCHEMICAL REACTION SEQUENCES 1305

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Section: Periodic Control Of Reaction Ratesmentioning

confidence: 99%

Selectivity Changes in Electrochemical Reaction Sequences by Modulated Potential Control

Fedkiw

Scott

1984

J. Electrochem. Soc.

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“…Inspired by this work, a modified pulsereverse cycle was re-designed with an anodic pulse train with the inclusion of intervals of short cathodic pulses. The use of these high-frequency pulses benefited the dissolution of Ni, therefore avoiding passivation 22 .…”

Section: Introductionmentioning

confidence: 99%

“…The use of these high-frequency pulses benefited the dissolution of Ni, therefore avoiding passivation. 22 SiC nanoparticles with a diameter of 50 nm were selected to be combined with Ni from a Watts bath and deposited according to the designed pulsed waveform and by direct current (DC) as reference. Particles content, as well as microstructure and microhardness, were studied properties.…”

mentioning

confidence: 99%

Electrocodeposition of Nano-SiC Particles by Pulse-Reverse Under an Adapted Waveform

Pinate

Leisner

Zanella

2019

J. Electrochem. Soc.

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“…Carbon nanotubes can be used to promote electron transfer reactions when used as electrode material in electrochemical devices, electrocatalysis and electroanalysis processes due to their significant mechanical strength, high electrical conductivity, high surface area, good chemical stability, as well as relative chemical inertness in most electrolyte solutions and a wide operation potential window [29,30]. The electronics properties of these nanomaterials have been exploited as means of promoting the electron transfer reaction for a wide range of molecules and biological species including; insulin [31], carbohydrates [32], hydrogen peroxide [33], trinitrotoluene [34], nucleic acids [35], dopamine, ascorbic and uric acids [36], norepinephrine [37], aminophenol [38], 6-mercuptopurine [39], nitric oxide [40], cytochrome C [41], meoglobine [42], thymine [43] and glucose [44]. We have recently used CNTs modified electrodes for determination of important compounds such as thiols [45], morphine [46], epinephrine [47] and glucose [48].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Determination of Ranitidine and Metronidazole at Glassy Carbon Electrode Modified with Single Wall Carbon Nanotubes

et al. 2007

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Single-walled carbon nanotubes(SWCNTs) were dispersed into DMSO, and a SWCNTs-film coated glassy carbon electrode was achieved via evaporating the solvent. The results indicated that CNT modified glassy carbon electrode exhibited efficiently electrocatalytic reduction for ranitidine and metronidazole with relatively high sensitivity, stability and life time. Under conditions of cyclic voltammetry, the potential for reduction of selected analytes is lowered by approximately 150 mV and current is enhanced significantly (7 times) in comparison to the bare glassy carbon electrode. The electrocatalytic behavior is further exploited as a sensitive detection scheme for these analytes determinations by hydrodynamic amperometry. Under optimized condition in amperometric method the concentration calibration range, detection limit and sensitivity were about, 0.1 -200 mM, detection limit (S/N ¼ 3) 6.3 Â 10 À8 mol L À1 and sensitivity 40 nA/mM for metronidazole and 0.3 -270 mM 7.73 Â 10 À8 mol L À1 and 25 nA/mM for ranitidine. In addition, the ability of the modified electrode for simultaneous determination of ranitidine and metronidazole was evaluated. The proposed method was successfully applied to ranitidine and metronidazole determination in tablets. The analytical performance of this sensor has been evaluated for detection of these analytes in serum as a real sample.

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Electrochemical dissolution of nickel in sulphuric acid by alternating current

Cited by 9 publications

References 0 publications

Selectivity Changes in Electrochemical Reaction Sequences by Modulated Potential Control

Selectivity Changes in Electrochemical Reaction Sequences by Modulated Potential Control

Electrocodeposition of Nano-SiC Particles by Pulse-Reverse Under an Adapted Waveform

Simultaneous Determination of Ranitidine and Metronidazole at Glassy Carbon Electrode Modified with Single Wall Carbon Nanotubes

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