Catalytic wave of hydrogen in systems based on iron(II) nitrosyl complexes

The electroreduction of Fe(III) at a dropping mercury electrode in an aceta te buffer solution containing NO2- and NH4+ ions and some hydroxy acids was studied. Based on the fact that the current depends on a number of factors , it was concluded that the wave observed was catalytic wave of hydrogen. T he proposed mechanism of the process includes the electroreduction of the F e(III) complex, the Formation of a mixed-ligand Fe(II) complex, and its pro tonation and reduction at a dropping mercury electrode with the liberation of hydrogen.