Abstract
With the protection of sodium oleate, Au and Ag nanoparticles colloid solutions were produced through reducing HAuCl 4 and AgNO 3 separately with NaBH 4 in an aqueous solution. Monolayers of Au, Ag nanoparticles and sodium oleate were self-assembled on the fresh active surface of the copper electrode. Comparing with the monolayers of the sodium oleate, the self-assembled monolayers of Au and Ag nanoparticles have more effective corrosion inhibition for copper as indicated by the high charge-transfer resistance shown in cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). X-ray photoelectron spectroscopy (XPS) indicates the percentages of Au and Ag are quite low in the SAM. It demonstrates that the major component of the SAMs is sodium oleate.
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