Photoelectrochemical water splitting at titanium dioxide nanotubes coated with tungsten trioxide
Abstract
The photocatalytic splitting of water into hydrogen and oxygen using solar light is a potentially clean and renewable source for hydrogen fuel. Titanium oxide nanotubes coated with tungsten oxide were prepared to harvest more solar light for the first time and characterized their water splitting efficiency. The tungsten trioxide coatings significantly enhanced the visible spectrum absorption of the titanium dioxide nanotube array, as well as their solar-spectrum induced photocurrents. For the sample, upon white light illumination at 150mW/cm2, hydrogen gas generated at the overall conversion efficiency of 0.87%.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2006
- DOI:
- 10.1063/1.2357878
- Bibcode:
- 2006ApPhL..89p3106P
- Keywords:
-
- 82.45.Yz;
- 82.50.-m;
- 82.45.Jn;
- 82.65.+r;
- 73.63.Fg;
- 82.45.Hk;
- Nanostructured materials in electrochemistry;
- Photochemistry;
- Surface structure reactivity and catalysis;
- Surface and interface chemistry;
- heterogeneous catalysis at surfaces;
- Nanotubes;
- Electrolysis