Elektrochemische abscheidung von sauerstoff und ozon an bleidioxid und platin-anoden in wässrigen elektrolyten mit 18O-markiertem wasser

Electrochemical generation of ozone using a PEM electrolyzer at acidic pHs

“…Simulations obtained with this new model (model 2) are the black lines shown in Figures2 to 7, which clearly fit much better the experimental results. In addition, regression coefficients for the previous and the new models as well as the experimental versus the modelled plot for all results shown in this work are in Figure9, where the much better reproducibility reached by considering the formation of ozone, not only from water but also from oxygen, is actual proof of the relevance of these mechanisms, despite the conclusions of previous works, in which by means of isotopebased techniques it was proposed that ozone can only be produced from the six-electron transfer oxidation of water[22] Pearson's matrix of the model proposed for ozone production at acidic pH conditions…”

“…The electrochemical production of ozone is known to develop from the oxidation of water on the surface of the anode of electrochemical cells [22] according to equation 1. This reaction competes with the oxidation of water to oxygen, which needs lower potentials (E• =+1.23 V vs E• =+1.51 V) and only a four electron-transfer, instead of the six required for the formation of ozone [23,24].…”

New insights about the electrochemical production of ozone

“…Ozone is produced electrolytically by oxidation of water (Eq. 3) [28] as it was demonstrated using radiotracer techniques [29]. This reaction competes with the oxygen production (Eq.…”

Capillary Effect-Enabled Water Electrolysis for Enhanced Electrochemical Ozone Production by Using Bulk Porous Electrode

“…Although the solid polymer electrolyte (SPE) technology employing proton-exchange membrane has been developed to achieve a high EOP efficiency, ,, it still suffers from these intractable issues of the relatively low OER potential and the unfavorable gaseous ozone escaping (when O 3 gas is the target product instead of the ozone-dissolved water in the common SPE-based EOP , ), which hopefully provide a room for further improving the gaseous ozone productivity. According to the commonly accepted EOP mechanism, O 3 formation depends essentially on the intermediate reaction between the hydroxyl free radical-derived active atomic oxygen and the adsorbed oxygen molecule, while the later will competitively desorb into gaseous O 2 as an OER process. ,,− In theory, an increased level of adsorbed oxygen molecule will increase the reaction barrier to eq , and simultaneously benefit the ozone formation. Additionally, aimed at preventing these as-generated O 3 from the undesirable quick decomposing in a large quantity of electrolyte, it is necessary to find an effective yet simple solution by shortening the gaseous O 3 escaping distance to atmosphere.…”