Composition of chemisorption layers forming on a chromium electrode in sulfuric acid solutions of formaldehyde and formic, oxalic, and glyoxylic acids

摘要

Surface layers that form on a chromium electrode after its contact with sulfuric acid solutions of formaldehyde, formic, oxalic, and glyoxylic acids at an open-circuit potential and in conditions of cathodic polarization at a potential of -1.05 +/- 0.10 V (NHE) are examined by an x-ray photoelectron spectroscopy method. The structure of the C1s line, which characterizes the binding energy of electrons of that level with the nucleus in products of interaction of said organic compounds with metal, is analyzed in detail. It is established that chemisorption products include substances with reduced oxygen-containing functional groups and hydrocarbon fragments. The degree of carbonation of chemisorption products, whose appearance is probably connected with electrocatalytic reduction and processes of polymerization of organic substances, is given an estimate.