Melt-solid flow with diffusion-controlled chemical reaction

1992 ◽  
Vol 19 (3) ◽  
pp. 309-312 ◽  
Author(s):  
Hikaru Iwamori
Keyword(s):  
Chemical Reaction ◽  
Solid Flow ◽  
Diffusion Controlled

Voltammetric studies of the electrochemical behaviour of salicylidene-2-aminopyridine at a hanging-mercury-drop-electrode

1986 ◽  
Vol 64 (4) ◽  
pp. 702-705 ◽  
Author(s):  
Refat Abdel-Hamid
Keyword(s):  
Chemical Reaction ◽  
Electrochemical Behaviour ◽  
Order Rate Constant ◽  
Potential Sweep ◽  
Cyclic Voltammetric ◽  
Diffusion Controlled ◽  
Voltammetric Characteristics ◽  
Irreversible Chemical Reaction ◽  
Voltammetric Studies ◽  
Tetraethylammonium Perchlorate

Electrochemical behaviour of salicylidene-2-aminopyridine has been investigated in 0.1 M tetraethylammonium perchlorate–dimethylformamide solutions by cyclic voltammetric and convolution potential sweep voltammetric methods. It was found that the depolarizer exhibits two well-defined diffusion-controlled irreversible one-electron waves. The cyclic voltammetric characteristics and the convolution, deconvolution, and logarithmic convolution analyses reveal that salicylidene-2-aminopyridine in such conditions follows a set of two one-electron transfer reactions each followed by an irreversible chemical reaction. The values of the first-order rate constant of the irreversible chemical reaction and E1/2 were computed.

Interfacial Studies on Cr and Ti Deposited on Benzocyclobutene (BCB) Film

1990 ◽  
Vol 203 ◽  
Author(s):  
Kyung W. Paik ◽  
Herbert S. Cole
Keyword(s):  
Thermal Diffusion ◽  
Chemical Reaction ◽  
Depth Profiling ◽  
Extended Time ◽  
Subsequent Formation ◽  
Metal Diffusion ◽  
Diffusion Controlled ◽  
Time Periods ◽  
Interfacial Characteristics

ABSTRACTInterfacial characteristics such as chemical reaction, metal diffusion, and morphology were investigated for Cr/BCB and Ti/BCB structures. Using Auger and XPS depth profiling, the formation of Ti carbide and Cr oxide was confirmed at the metal/BCB interface. Annealing at 250 °C for extended time periods resulted in diffusion of Cr and Ti into the BCB and subsequent formation of CrSi2 and Ti-Si compound precipitates. The reaction is a thermal diffusion controlled process which was dependent on time and temperature. It was also found that Ar backsputtering treatment on BCB film before metallization was found to roughen the surface resulting in metal spikes which penetrate into the BCB film.

The reduction of gold(III) dithiocarbamates at the mercury electrode

1981 ◽  
Vol 34 (9) ◽  
pp. 1861 ◽  
Author(s):  
M Ahmed ◽  
RJ Magee
Keyword(s):  
Cyclic Voltammetry ◽  
Propylene Carbonate ◽  
Chemical Reaction ◽  
Mercury Electrode ◽  
Carbonate Solution ◽  
Reduction Step ◽  
Diffusion Controlled ◽  
Electron Reduction

The reduction at the mercury electrode of a series of gold(III) dithiocarbamates [Au(S2CNR2)3] in propylene carbonate solution has been investigated by d.c. polarography, cyclic voltammetry and chronoamperometry. ��� Under polarographic conditions, the complexes undergo reduction in a single, diffusion-controlled step. Exhaustive reduction of the complexes at the mercury pool electrode gave non-integral values (3 > n > 2), suggesting the presence of a coupled chemical reaction involving dissociation of the product of the first reduction step. ��� At short electrolysis times (t < 2 s), the slopes of the chronoamperometric i against t-½ plots were typical of two-electron reductions. At longer electrolysis times (t > 4 s), the slopes approached a three-electron reduction. ��� Cyclic voltammetry confirmed that the products resulting from the first reduction are susceptible to dissociation, releasing free dialkyldithiocarbamate anion.

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