Transfer of mass or heat to an electrode in the region of hydrogen evolution—II.: Experimental verification of mass and heat transfer equations

Abstract

Radioactive mercury, 203Hg, was deposited both on smooth Pt and amalgamated Pt electrodes in 1 N KOH, in the region of hydrogen bubble evolution. The relation found between the cd for deposition of mercury, i R , and for evolution of hydrogen, i G , is in accord with the equation derived previously[1] for systems with a surface incompletely covered with hydrogen bubbles. The heat transfer coefficient on a platinum electrode located on the wall of a rectangular channel was measured under defined hydrodynamic conditions during hydrogen evolution in 0·5 N KOH. The measured dependence of the heat flow and cd of hydrogen evolution is in accord with the relationship obtained earlier[1] for systems with fully covered surface by the evolved gas bubbles.