| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 66191 | Journal of Molecular Catalysis A: Chemical | 2012 | 7 Pages |
Platinum nanoparticles were doped on TiO2 nanotube arrays (TNT/Ti) by micro-emulsion method. TiO2 nanotube arrays were successfully fabricated by anodizing of titanium sheets. The morphology and surface analysis of Pt/TNT/Ti catalysts were investigated using scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The electro-oxidation of lactose on Pt/TNT/Ti catalysts in alkaline medium was studied by cyclic voltammetry and chronoamperometry methods. The results showed that the oxidation peak currents on the Pt/TNT/Ti catalyst for lactose oxidation are about ten times larger than a smooth platinum electrode and confirmed the better electro-catalytic activity and stability of these new electrodes. The photo-catalytic properties of TiO2 make the Pt/TNT/Ti catalyst refreshable after a short UV treatment and the electro-oxidation current density of Pt/TNT/Ti catalysts after UV-cleaning can be re-established. Also Pt/TNT/Ti catalysts showed a remarkably enhanced performance for lactose oxidation under UV illumination compared to that without UV illumination.
Graphical abstractVoltammetric response of the fresh, poisoned, refresh Pt/TNTs/Ti electrode in a 0.1 M NaOH–0.01 M lactose solution at 25 °C with a scan rate of 100 mV s−1. The photo-catalytic properties of TiO2 make the Pt/TNTs/Ti catalyst refreshable after a short UV treatment, and the electro-oxidation current density of Pt/TNTs/Ti catalysts after UV-cleaning can be re-established.Figure optionsDownload full-size imageDownload high-quality image (112 K)Download as PowerPoint slideHighlights► Pt/TNT/Ti catalysts with high porous structure and excellent electro-catalytic were prepared. ► Pt/TNT/Ti showed a remarkably enhanced performance for lactose oxidation under UV lighting. ► Advantages of Pt/TNT/Ti for lactose oxidation are high current density and good stability. ► Anti-poisoning ability of TiO2 makes Pt/TNT/Ti catalyst reusable after a short UV treatment. ► This study provides a new route for the simple, facile and cost-effective synthesis of Pt/TNT/Ti.
