Galvanostatic pulse method

Another strategy for the immobilization of enzymes has been described in which the galvanostatic pulse method of... 

In the galvanostatic pulse method (GSPM) [37], lithium is inserted into (and extracted from) the surface layer of the electrode by a short rectangular current pulse i. The charge transfer step is presumed fast and the measured electrode potential is entirely determined by the surface concentration of lithium. During the... 

CS = coulostatic method, CV = cyclic voltamogram, FD = Faradaic distortion method, FR = Faradaic rectification, GD = galvanostatic double pulse method, IP = impedance method, PS = potential step method. See also list of... 

Galvanostatic current-pulse method, 38 29, 33 Galvanostatic technique hydrocarbon adsorption, 30 256 surface coverage, 30 299-300 Gamma emission, 26 124, 125, 127 Garin-Gault mechanism, 30 20, 23 Gas chromatography -atomic emission detection... 

Application of small amplitudes the galvanostatic single-pulse method (GSP)... 

The fast galvanostatic charging method can only be applied to the study of intermediates in the HER if the arrest due to hydrogen desorption is well separated in potential from the second arrest due to oxide formation or chemisorption of oxygen and/or H2 reoxidation. The shape of the galvanostatic pulse for platinum, exhibiting two separated arrests, is typical for most noble metals. The processes which give rise to the two separate arrests normally seen in these cases (74, 120) (Fig. 7) occur over a common potential... 

The intercept of the plot allows the determination of l/t o only when this term is appreciable compared to RT/F)ACdN (8). To overcome this limitation for fast electron-transfer reactions, where /q is large, the galvanostatic double-pulse method has been proposed (Section 8.6). 

Figure 8.6.1 Excitation waveform for the galvanostatic double pulse method.

Figure 8.6.2 Block diagram for galvanostatic double-pulse method. A two-electrode cell (i.e., with a common counter/reference electrode) is placed in a bridge circuit for compensation of the cell ohmic resistance, The bridge is adjusted with = Rb so that the...

Figure 8.6.3 a) Overpotential-time traces for galvanostatic double-pulse method for reduction of... 

This assertion is supported by the data in Table 1 concerning the behaviour of ARMCO iron in 1 m HCl solutions at various temperatures [40]. The direct evaluation of the corrosion current density. Id, was obtained from the determination of the concentration of ferrous ions, entered the solution, by the spectrophotometric technique. The galvanostatic pulse polarization curves were performed using the CORRCONTROL system [41] and the GALIMP program [42]. The corrosion current density, Ic, was computed using the NOLI method [34]. 

The determinations of R which was made using high-frequency alternating current, showed that its value was approximately 0.3 H. The polarization curves were performed using the galvanostatic pulse technique and their geometric shapes were analyzed by the NOLI method [34],... 

For the study of diffusion phenomena in solids it is also possible to work with potential pulses (potentiostatic pulses) or with constant current pulses (galvanostatic pulses). Examples described in the following paragraphs are based on the coulometric titration method described in Chapter 3. Weppner and Huggins reviewed these methods.In a continuous series of pulses the concentration of lithium in a sheet of aluminum is increased. The diffusion in each pulse is followed by either potential or current measurements. 

Saji T, Yamada T, Aoyagui S (1975) Electron-transfer rate constants for redox systems of Fe(III)/Fe(II) complexes with 2,2 -bipyridine and/or cyanide ion as measured by the galvanostatic double pulse method. J Electroanal Chem Interfacial Electrochem 61 147-153... 

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