Oxygen reduction on iron—IV. The reduction of hydrogen peroxide as the intermediate in oxygen reduction reaction in alkaline solutions

Zero valent iron (ZVI) mediated Fenton degradation of industrial wastewater: Treatment performance and characterization of final composites

“…The initial acid pH (3.0) increased when the hydrogen peroxide depleted, reaching values up to 5.5-6.0. When the hydrogen peroxide is consumed, the low increase of TOC conversion is attributed to another reactive oxidant species (ROS), such as the ferryl species [22,24,25]. The oxidation power of ferryl ions (Fe aq 4+ ) have been reported in the literature as a less reactive but more selective oxidant than hydroxyl radicals (only able to degrade oxidized compounds such as carboxylic acids), being stable at circumneutral pH values [26].…”

Sensor for oxygen evaluation in concrete

“…According to the findings of different researchers [4,[9][10][11][12][13][14][15][16], the modifications of oxide composition in the steel elec- trode are expected to influence the current values of oxygen reduction. Stratmann and Mü ller [15] demonstrate that the oxygen is predominantly reduced within the rust scale and that the kinetics of the electron transfer depends on the number of Fe(II) states inside the rust layer.…”

“…There are also some articles that address the mechanism and kinetics of oxygen reduction on iron, in alkaline solutions [9][10][11][12][13][14]. These papers propose an oxygen reduction mechanism on iron that involves the mediation of surface Fe(II) sites, formed by reduction in the passive film, which act as adsorption centres promoting the oxygen reduction reaction.…”

Study on kinetics of cathodic reduction of dissolved oxygen in 3.5% sodium chloride solution

“…The ORR on the surface of iron, stainless and carbon steel and alloys have been studied for several decades (Bonnel et al, 1983;Zečević et al, 1991;Le Bozec et al, 2001;Hurtado et al, 2003;Santos et al, 2006;Huang et al, 2006;Li and Prakash, 2009). Recently, much attention has been paid on the ORR in solutions containing chloride ions, which is an important ingredient in seawater and some industrial environments (Babić and Metikoš-Huković, 1993;Gojković et al, 1998;Miyata and Asakura, 2002;Cáceres et al, 2007;Kuang et al, 2009).…”