Influence of the characteristics of p-Si BDD anodes on the efficiency of peroxodiphosphate electrosynthesis process

Understanding active chlorine species production using boron doped diamond films with lower and higher sp3/sp2 ratio

“…Regarding the causes, it is important to take into account that production of perchlorate is not promoted with most of the electrodes typically used in electrochemical water treatment (DSA, Pt, graphite [19,21]). For this reason, its occurrence has been related to the very efficient production of hydroxyl radicals on the BDD surface and their availability to react with chlorates [9][10][11] (which can be formed from chlorite and hypochlorite chemical and electrochemical reactions). At this point, the enhanced production of perchlorates with BDD 1 (which has the highest content of sp 2 carbon) has to be explained in terms of the adsorption of chlorates species onto the electrode surface [9] where they can be easily attacked by the hydroxyl radicals formed on the surface of diamond, like suggested for producing other oxidants [20].…”

“…Success in this understanding will help to extend the application of BDD anodes to environmentally real oriented purposes. In recent studies, it has been demonstrated that the conductive layer and the substrate properties of diamond anodes have an important influence on the bulk electrolysis results [10][11][12]. Ratio sp 3 /sp 2 seems to be the key parameter promoting a behavior of active or non-active surface (inner sphere redox couple) in the BDD anodes [13].…”

Role of sp3/sp2 ratio on the electrocatalytic properties of boron-doped diamond electrodes: A mini review

“…In this frame, it seems reasonable to understand this behavior for the production of other strong oxidants, such as peroxodiphosphate [25], active chlorine [36], peroxodisulphate [37] or peroxodicarbonate [38]. In fact, recent results [36] suggest that, the Cl-mediated oxidation leads to desirable active chlorine species when a BDD with high diamond content was used at lower current densities (j …”

“…Nevertheless, recent results have demonstrated that EO is strongly influenced by BDD synthesis characteristics [2,[17][18][19][20][21][22][23][24][25], particularly the ratio of sp 3 /sp 2 carbon.…”

Electrochemical technologies for the regeneration of urban wastewaters

“…However, the key point in the use of this technology for WRF is not the oxidation of organics, but its good characteristic as a disinfection technology. Many works have reported the use of CDEO for direct disinfection of wastewaters and also for disinfectants production [30][31][32][33][34][35][36][37][38][39][40][41], but it has to be taken in mind that this is a new technology and that many points have to be still improved such as the avoiding in the occurrence of perchlorates during oxidation of chlorides, the reduction of cell potentials to diminish power consumption and the improvements in mass transfer to have more efficient processes.…”