Peroxodisulphate reduction as a novel probe for the study of platinum single crystal/solution interphases

Electrochemical behaviors of dimethyl ether on platinum single crystal electrodes. Part I: Pt(111)

“…It is interesting to note that potential for t app maximum (0.35 V) is near to the potential of zero total charge (pztc) of Pt(1 1 1) in 0.1 M H 2 SO 4 (0.33 V [46,47]). Similar features have also been observed for electrochemical reduction of N 2 O [48][49][50], nitrate [51], and peroxodisulphate [52] on the platinum single crystal electrodes. If the reaction species is assumed to interact weakly with electrode surface, it will competitively adsorb with other adsorbed species.…”

Peroxodisulfate reduction as a probe to interfacial charge

“…Another proposed probe reaction is the reduction of peroxodisulfate (PDS) anion, which is highly sensitive to the surface structure in low index platinum single crystal electrodes [16]. On Pt(111) the reaction at pH 1 takes place in the double layer region and is inhibited near to 0.36 V vs RHE, whereas at pH 3 the reaction is inhibited around 0.40 V vs RHE.…”

Peroxodisulfate generation on boron-doped diamond microelectrodes array and detection by scanning electrochemical microscopy

“…8. When the substrate potential is 0.5 V the voltammogram presents only one large reduction peak at approximatively -0.8 V. When we apply 2.2 V to the substrate an extra peak appears at -0.2 V. According to the literature [15][16][17]38] and to our previous results presented in paragraph 3.2, we can conclude that peroxodisulfate is detected at -0.2 V according to reaction (13) when the BDD is polarized at 2.2 V. This means that S 2 O 8 2-has been previously formed on the BDD microdisks of the array according to reaction (1).…”

“…The mechanism of the formation of peroxodisulfate from sulfate anions on platinum electrodes has been widely studied [14], as well as their reduction on different electrode material [15][16][17]. Two mechanisms have been proposed for the generation of peroxodisulfate.…”