Abstract
This paper aims at the investigation of the effect of phosphorus doping on the electrochemical properties of ZnO nanorod films as deposited on zinc substrates. Sodium dihydrogen phosphate has been used the phosphorus source for the deposition of ZnO nanorod films with varying electronic and electrochemical properties. Electrochemical impedance spectroscopy based Mott-Schottky analysis was performed to investigate the changes of flat-band potential and donor density. For the films synthesized with the addition of sodium dihydrogen phosphate, a clear reduction in donor densities were observed, which resulted in a decrease of zinc dissolution and oxygen reduction current densities. Octadecylphosphonic acid (ODPA) monolayers could be successfully deposited on the ZnO-film, which led to extremely water repellent surfaces and even more strongly reduced exchange current densities most probably due to an effective reduction in the active electrode surface area.
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