Abstract
Acrylonitrile (AN) electrosorption on mercury was determined from interfacial tension measurements under experimental conditions favouring its electrohydrodimerization (EHD) to adiponitrile, namely in aqueous solutions of 1.5 M lithium citrate containing 10 −3 M dodecylethyldimethylammonium (DE-DMA) bromide. Under these conditions, AN adsorptivity was shown to increase progressively towards more negative charge densities on the metal, due to co-adsorption with DEDMA bromide. Upon relating the adsorption isotherm of AN with its EHD rate, it was shown that AN EHD takes place through a rate-determining radical-substrate coupling step in the adsorbed state.
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