Does the reaction of copper(I) with hydrogen peroxide give hydroxyl radicals? A study of aromatic hydroxylation

Reaction of Cu(CN)32− with H2O2 in water under alkaline conditions: Cyanide oxidation, Cu+/Cu2+ catalysis and H2O2 decomposition

“…The dissociation of Cu 3+ produced •OH in acidic solutions [27]. However, the rate of formation of •OH from the dissociation of Cu 3+ was extremely slow at pH 8.0 [27], and the •OH was not formed in alkaline solutions [25]. Since our experiments were carried out in alkaline solutions (at pH 11.0), it was concluded that the •OH are formed via a Fenton-like reaction rather than the dissociation of Cu 3+ .…”

“…In previous studies, the various reaction mechanisms between Cu + /Cu 2+ and H 2 O 2 were reported. Eberhardt et al investigated the reaction of Cu + with H 2 O 2 by using fluorobenzene, anisole, and nitrobenzene as a probe for •OH and it was concluded that •OH was the major species resulting from the reaction [25]. In the presence of ethanol, 2-propanol and 2-butanol, it was found that Cu-O 2 H complex was formed stably between Cu + with H 2 O 2 [26].…”

Formation of hydroxyl radical (·OH) in illuminated surface waters contaminated with acidic mine drainage

“…A recent study [14] [16,17]. Hydroxyl radical is also formed by sunlight photolysis of hydrogen peroxide [18].…”

Enhanced Fenton-like degradation of pharmaceuticals over framework copper species in copper-doped mesoporous silica microspheres

“…Recently, Cu-based catalysts have attracted considerable attention because the redox properties of copper are similar to iron, and the Cu-based Fenton-like system could work over a broader pH range than the Fe-based redox system [13,14] ), can efficiently produce Å OH [13,15,16]. Due to the mobilization of Cu(II)/Cu(I) in water, copper has been suggested to be supported on a porous solid substrate.…”