Electrode cont

Reference electrode (cont.) in aqueous systems, 476 reversibility, 342... 

Rotating disk electrode (cont.) diffusion coefficient, 1141 diffusion layer in, 1234 disk current in, 1141 ECE reactions determination by. 1144 electrooxidation of methanol, 1139 kinematic viscosity, 1141,1234 intermediate radicals, determination of. 1139. 

Diffusion layer (cont.) polarography. 12-46 thickness, 1335 turbulent flow and, 1234 Diffusion coefficient, and rotating disk electrode. 1141... 

Ylla-Conte (Ref 5) patented in Germany an industrial method of prepn by che action of Na vapors on carbon at high temps produced by an elec arc betn C electrodes in atm of H in a closed chamber. Some other methods are listed in Ref 1, p 9091 Refs l)Beil 1,239,[217] l909t 2)M. 

A variety of electrode reactions14 can occur at the anode. Some of them result in the formation of gases, corrosive attacks on most electrode materials, or oxidative attacks on the membrane in contact with the anolyte solution. Platinum is too cosily for use as an anode material, but titanium or tantalum conted with ex ire ms ly thin (mjcrainchas) layers of platinum has bean used. Lead dioxide deposited on and within graphite has been used also. Oxidation-resistant rnsmbranes (fluorocarbon-based) often are used adjacent to the anolyte solution even though they are expansive. 

Table 2.2 Standard Electrode Potentials at 25 °C and Their Isothermal Temperature Coefficients [12]—cont d...

Wadhwa, R., Lagenaur, C. F. and Cui, X. T. (2006) Electrochemically controlled release of dexamethasone from conducting polymer polypyrrole coated electrode, J. Cont. Rel., 110, 531 1. 

Hsu, C.T., Lyuu, H.J., Yang, T.H., Conte, E.D. and Zen, J.M. (2006) Profiling clinically important metabolites in human urine by an elecnochemical system containing disposable electrodes. Sensors Aauators... 

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