Homogeneous Catalysis in Flow-By Porous Electrodes Containing Gas-Liquid Flow

The introduction of reactant-containing bubbles provides a means by which the mass transfer limitations in the electrochemical conversion of gaseous reactants can be alleviated. Such an approach is attractive for the reduction of oxygen in fuel cells and caustic-chlorine cells, and for the electrochemical synthesis of organic compounds. Because these systems are usually kinetically limited, electrocatalysis ia also of primary importance. Through the use of dissolved redox couples as charge-carrying intermediates between the electrode surface and dissolved reactant, both the mass transfer and the kinetic resistances can be minimized. In this paper, the behavior of these homogeneous catalysis was explored.