A study on the voltammetric relation of gas diffusion electrodes working in high overpotential region

Abstract

A simple math. equation was derived for the potential of gas diffusion electrodes, for metal-air batteries and fuel cells operating in high over-potential conditions. Calcns. using the equation indicate that the potential varies linearly with the c.d. and the slope of the straight line is determine by mass transfer and structure parameters. Mass transfer and structure can be modified to decrease the value of the slope, thus improving electrode performance. The slope values calculated using the equation are in agreement with measured data of a diffusion electrode during O reduction forming H2O2 in KOH solution

Key words: OXYGEN, ELECTRODE, REDUCTION, HYDROGEN PEROXIDE, ELECTRIC POTENTIAL, POTASSIUM HYDROXIDE, ELECTRO-CATALYSIS, CURRENT DENSITY, VOLTAMPERE CHARACTERISTIC, GAS DIFFUSION

CLC Number:

O646

Cite this article

LU ZHAOE;QIAN WEIMIN;ZHONG TIANGENG;FANG GUONU. A study on the voltammetric relation of gas diffusion electrodes working in high overpotential region[J]. Acta Chimica Sinica, 1990, 48(2): 143-147.

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