Surface acoustic wave enhanced water splitting reaction with methanol as a sacrificial material
| Autor: | Alexander Reiner, Christoph Westerhausen, Sixuan Wang, Rudolf Herrmann, Achim Wixforth |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen Energy conversion efficiency Surface acoustic wave chemistry.chemical_element 02 engineering and technology Acoustic wave 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Catalysis 0104 chemical sciences Condensed Matter::Materials Science symbols.namesake Chemical engineering chemistry symbols Photocatalysis Water splitting ddc:530 Physics::Chemical Physics Rayleigh wave 0210 nano-technology Hydrogen production |
| Zdroj: | Catalysis Science & Technology. 11:1458-1466 |
| ISSN: | 2044-4761 2044-4753 |
| DOI: | 10.1039/d0cy01788d |
| Popis: | TiO2 is the most widely used photocatalyst for the water splitting reaction to generate the clean fuel hydrogen, but its energy conversion efficiency is still low, mainly due to the easy recombination of photo-generated electron–hole pairs. In order to promote the efficiency of the catalyst, a surface acoustic wave assisted catalyst is presented in this study. On 128° rotated y-cut LiNbO3, Rayleigh waves with a frequency of 150 MHz are generated and act on Pt modified TiO2 catalyst nanoparticles. We here quantify the effect of the application of surface acoustic waves to a Pt/TiO2 catalyst for hydrogen production by photo-splitting of a methanol/water vapor mixture. The results convincingly show that the photocatalytic activity of Pt/TiO2 is clearly enhanced by the SAW propagation underneath the catalyst layer. The effect increases nonlinearly with the applied power level of the acoustic waves. As the main mechanism, we identify the electric field produced by the displacement of LiNbO3, which hinders the recombination of photo-generated electron–hole pairs. |
| Databáze: | OpenAIRE |
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