Abstract
The state of the theory and practice in an important field of polarography — the catalytic currents of oxidant-substrates — is examined. It has found extensive applications in the last ten years in the development of highly sensitive methods for the determination of a large number of substrates, catalysts, and polarographically inactive ligands. Attention has been given to the problem of the electrocatalytic reduction of molecular nitrogen for its fixation under mild conditions. A systematic account is given of data for a series of inorganic and organic substrates and catalysts which transfer an electron to the substrate. The bibliography includes 242 references.