Fast fabrication of Ta2O5 nanotube arrays and their conversion to Ta3N5 for efficient solar driven water splitting |
| |
| Institution: | 1. Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany;2. Department of Chemistry, King Abdulaziz University, Jeddah, Saudi Arabia;1. Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremburg, Martensstrasse 7, D-91058 Erlangen, Germany;2. Department of Chemistry, King Abdulaziz University, Jeddah, Saudi Arabia |
| |
| Abstract: | This work shows that highly ordered and mechanically stable micrometer-long Ta2O5 nanotube arrays can be fabricated by galvanostatic anodization in a few seconds. Typically, ~ 7.7 μm long nanotubes can be grown at 1.2 A cm− 2 in only 2 s. Such nanotubes can be converted to Ta3N5 nanotube arrays by nitridation. Photoelectrochemical (PEC) water splitting using AM 1.5G illumination yields for the Ta3N5 nanotube photoanode modified with cobalt phosphate (Co–Pi) remarkable photocurrents of 5.9 mA cm −2 at 1.23 VRHE and 12.9 mA cm −2 at 1.59 VRHE and after Ba-doping a value of 7.5 mA cm −2 at 1.23 VRHE is obtained. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
