Periodic and complex waveform current oscillations of copper electrodissolution in phosphoric acid in an epoxy-based microchip flow cell

Linking the Cu(II/I) potential to the onset of dynamic phenomena at corroding copper microelectrodes immersed in aqueous 0.5 M NaCl

“…Itagaki and coworkers [10] demonstrated with elegant channel flow double electrode experiments in aqueous sulfuric acid/NaCl solution that the rate of formation of Cu 2+ sympathized with the rate of corrosion (or copper oxidation) even in chaotic current oscillation regimes. More recent work has been reported also on copper electrodissolution in a micro-fluidic chip in aqueous phosphoric acid [11]. The mechanism is revisited here for the case of copper in neutral aqueous 0.5 M NaCl (model sea water) and for microelectrodes [12] rather than under hydrodynamic rotating disk conditions.…”

Electroanalysis from the past to the twenty-first century: challenges and perspectives

“…Monitoring in flow systems has to be developed if electrochemical sensors aspire to be useful in on-site and/or on-line monitoring for environmental or industrial purposes. This can be made at regular scale or by using microfluidics [85][86][87][88]. In any case, the prevention against suspended particles and certain substances that could block the channels and cause electrode fouling is a matter of highest priority.…”