Catalytic hydrogen discharge by cycloserine in metal ion-containing ammonia buffer

In the polarog. of cycloserine in ammonia buffer, the catalytic hydrogen wave is enhanced in the presence of Ni2+, Zn2+, Cd2+, and Cu2+. The half-wave potential of the catalytic wave increases in the above-mentioned order of cations. The catalytic wave is very similar to a wave of pre-sodium type. The enhancement of the wave can be explained by the convective transport of the metal ion due to electrolyte streaming as in the case of maximum of the first kind. Cycloserine transport toward the electrode in ligand form also plays an important role.