Serrano, K.Michaud, P. A.Comninellis, C.Savall, A.2006-02-222006-02-222006-02-22200210.1016/S0013-4686(02)00688-6https://infoscience.epfl.ch/handle/20.500.14299/225389WOS:0001804084000143384The authors have studied the electrochem. oxidn. of H2SO4 on B-doped synthetic diamond electrodes (BDD) obtained by hot filament CVD on p-Si. High current efficiency for H2SO4 oxidn. to peroxodisulfuric acid can be achieved in concd. H2SO4 (>2M) at moderate temps. (8-10 Deg). The main side reaction is oxygen evolution. Small amts. of peroxomonosulfuric acid (Caro's acid) also were detected. A reaction mechanism involving hydroxyl radicals, HSO4- and undissociated H2SO4 is proposed. According to this mechanism electrogenerated hydroxyl radicals at the BDD anode react with HSO4- and H2SO4 giving peroxodisulfate. [on SciFinder (R)]text::journal::journal article::research article