MASS-TRANSFER TO A GAS-GENERATING ELECTRODE

The factors that affect mass transfer to a gas-generating electrode du ring evolution of oxygen and hydrogen are analyzed. The substance flux es calculated for the case of natural convection and circulation of th e fluid are much smaller than those determined experimentally, which p oints to the necessity of accounting for the specific influence of the moving bubbles that transform the diffusion layer. Under these condit ions, the mass transfer mechanism is strongly dependent on the nature of the evolving gas, the Patio between the diffusion layer thickness a cid the size of evolving bubbles, and on the hydrodynamic mode of moti on of bubbles. Mass transfer to a gas-generating electrode is shown to be analogous to that in a fluidized boiling bed.