Synthesis and application of lead dioxide nanowires for a PEM ozone generator

Highlights: • PbO₂ nanowires were electrodeposited using an anodic aluminum oxide membrane. • Ozone current efficiency remained steady at approximately 20%. • The performance did not decrease significantly during a 30-day period. - Abstract: PbO₂ nanowires that were approximately 200 nm in diameter were obtained by template electrodeposition using an anodic aluminum oxide membrane. A proton exchange membrane (PEM) water electrolyzer with an anode made of this PbO₂ nanowire, a cathode made of carbon supported platinum, and Nafion^®-117 membrane operating at a current density of 1.5 A cm⁻², an ozone current efficiency of 20% was achieved, and did not attenuate significantly during a 30-day period.