Electrochemical Behavior and Passivation of Cu–30Zn Alloy in Aqueous NaOH Solutions

Abstract

In this work, the electrochemical behavior and passivation of Cu-30Zn alloy in aqueous NaOH solutions was investigated using various electrochemical methods. Potentiodynamic polarization curves showed that increasing NaOH concentration leads to increase corrosion current densities. Mott-Schottky analysis indicated that the passive films displayed p-type semiconductive characteristics and the acceptor densities increased by increasing NaOH concentration, while the flat band potential decreased. Moreover, electrochemical impedance spectroscopy studies showed that the impedance value decreased by increasing NaOH concentration, due to increase in the Zn dissolution of Cu-30Zn alloy, which is consistent with the results of the polarization experiment and X-ray diffraction patterns.

Multifunctional CuO/Cu2O Truncated Nanocubes as Trimodal Image-Guided Near-Infrared-III Photothermal Agents to Combat Multi-Drug-Resistant Lung Carcinoma

“…On the other hand, CuO/Cu 2 O nanostructures show high efficiencies in the photodegradation of organic pollutants when compared to that of bare CuO or Cu 2 O nanocrystals. It was reported that the bandgap of a p-type semiconductor CuO is 1.3–1.6 eV, which is lower than the corresponding bandgap of Cu 2 O (2.0 eV) . Very recently, we have reported the visible-light-activated Sonogashira C–C coupling reaction at room temperature catalyzed by single-metal heterogeneous Cu 2 O truncated nanocubes (Cu 2 O TNCs) .…”