Galvanostatic polarization curve

Figure 4. Galvanostatic polarization curves for the metal fluoride impregnated carbon in the fluorine cell...

Fig. 1.12 Steady-state galvanostatic polarization curves for the oxidation of 1 M solutions of the following fuels 1,4-dioxane, tetrahydrofuran (THF), 1,2-dimethoxyethane (DME), and dimethoxymethane (DMM) on Pt/Sn gas-diffusion electrodes in 0.5 M sulfuric acid + 0.01 M CgFiySOgH at 55 °C. 

Fig. 1.17 Steady-state galvanostatic polarization curves for the oxidation of trioxane at 55 °C at various concentrations on Pt/Sn electrodes in 2.0 M sulfuric acid and 0.01 M C8-acid. 

Fig. 1.21 Steady-state galvanostatic polarization curves for the oxidation of...

The galvanostatic polarization curve shown in Fig. 4.6 was obtained using a galvanosta-tically (constant current) controlled circuit. 

E4.1. Calctilate and construct, using mixed potential theory, the critical passivation current density (a) potentiostatic and (b) galvanostatic polarization curve for anodic dissolution for active-passive metal that has the following electrochemical parameters Ecorr= 0-5 V vs. SCE, Epp= — 0.4 V vs. SCE, 4orr= 10 A/cm, K = 0.05,. , = 10 A/cm andEtr= + l-0V vs. SCE. 

Figure 2.2.1 shows the galvanostatic polarization curves of BDD anodes in molten NH4F-2.0HF and a pristine carbon FE-5 anode in NH4E-KE-4.0HF. The anode effect took place at a current density of only 32 mA cm ... 

Figure 5.2.2 shows the galvanostatic polarization curves of BDD and Ni anodes in the (CH3)3N-5.0HF. The anode potential on the Ni electrode was larger even at low current density, because an oxidized layer composed of NiFj, NiOi+ t (0electric conductivity, was formed on the Ni anode during electrolysis [7]. In contrast, the anode potential on the BDD electrode increased slightly with increasing current density and no anode effect took place at lOOmAcm". Therefore, it was found that the overpotential on a BDD anode was lower than that on a Ni anode. 

Figure 5.2.2 Galvanostatic polarization curves of BDD ( ) and nickel anodes (u) in the (CH J N-S.OHF melt. Reproduced with permission from [7], Copyright 2004, Elsevier...

The galvanostatic polarization curves of BDD and Ni anodes in the (CH3)4NF-5.0HF melt indicate that the overpotential on the former (a BDD anode) was much lower than that on the latter (a Ni anode). 

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