Exploring the influencing factors of the electrochemical reduction process on the PEC water splitting performance of rutile TiO2.
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| Title: | Exploring the influencing factors of the electrochemical reduction process on the PEC water splitting performance of rutile TiO |
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| Authors: | Ding, Yibo1,2 (AUTHOR), Lin, Jiayu1 (AUTHOR), Jiang, Chenfeng1 (AUTHOR), Sun, Yi3 (AUTHOR), Zhang, Xiaoyan1 (AUTHOR) xyzhang_dd@shu.edu.cn, Ma, Xiaoqing2 (AUTHOR) xqma@sues.edu.cn |
| Source: | Journal of Materials Science. Nov2024, Vol. 59 Issue 41, p19596-19611. 16p. |
| Subjects: | Electrolytic reduction, Standard hydrogen electrode, Nanorods, Surface structure, Rutile, Photoelectrochemistry |
| Abstract: | The self-doping of oxygen vacancy and Ti3+ by electrochemical reduction (ER) method has been proved to be an effective means to improve the PEC performance of TiO2. However, the effect of the surface structure on ER treatment remains ambiguous. In this work, three kinds of nanostructured rutile TiO2 (nanowire arrays (TNWs), etched nanowire arrays (E-TNWs) and nanorod arrays (TNRs)) were reduced electrochemically to explore the factors influencing the ER process of rutile TiO2. The experimental results show that alkaline environment (1 M NaOH) is more conducive to the occurrence of ER reaction. And the reduced three kinds of nanostructured TiO2 photoanodes show a significantly higher photocurrent density of about 1.46, 1.65 and 1.45 mA cm−2 at 1.23 V vs. relative hydrogen electrode (RHE), respectively, which are 15, 16 and 1.1 times that of pristine TiO2. The different degrees of photocurrent density enhancement can be ascribed to the different degrees of electrochemical reduction of TiO2 with different crystallinity and exposed crystal facets as well as specific surface area. This study provides new insights into the mechanism of electrochemical reduction method. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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