Enhanced Electrochemical Water Splitting Activity Using Annealed TiO2 Nanoparticles As Photoanodes
| Autor: | Thi Dieu Thuy Ung, Khac An Dao, Xuan Dien Luong, Tien Thanh Nguyen |
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| Rok vydání: | 2021 |
| Předmět: |
Photocurrent
Materials science Oxide Substrate (electronics) Condensed Matter Physics Tin oxide Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Chemical engineering Electrode Materials Chemistry Photocatalysis Reversible hydrogen electrode Water splitting Electrical and Electronic Engineering |
| Zdroj: | Journal of Electronic Materials. 50:6459-6466 |
| ISSN: | 1543-186X 0361-5235 |
| DOI: | 10.1007/s11664-021-09175-1 |
| Popis: | We present the photoelectrochemical characteristics of TiO2 nanoparticle-based photoanodes. TiO2 nanoparticles (P25) were deposited on fluorine-doped tin oxide (FTO) substrate by spin-coating and thermally annealed in a vacuum for enhancing the active photocatalyst. At a potential of 0.4 V (versus a reversible hydrogen electrode), the annealed TiO2 nanoparticle-based photoanode in vacuum shows a photocurrent density of 0.27 mA/cm2 and photoconversion efficiency of (η = 0.22%), which are higher than those an of annealed TiO2 nanoparticle-based electrode in air. The improved photoelectrochemical properties are attributed to high oxygen vacancy (OV) density with more active sides while TiO2 nanoparticles are annealed in a vacuum (~1.33 × 10−2 kPa) with low oxide concentration conditions. From this finding, we propose that thermal annealing can serve as an approach for fabricating the photoanodes of TiO2-based material consisting of a more active photocatalyst. |
| Databáze: | OpenAIRE |
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