Exploration of photocatalytic seawater splitting on Pt/GaP-C3N4 under simulated sunlight
| Autor: | Jeffrey C.S. Wu, Han Van Dang, Yen Han Wang |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Materials science
Hydrogen Oxygen evolution Analytical chemistry General Physics and Astronomy Artificial seawater chemistry.chemical_element Quantum yield Heterojunction Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films chemistry Photocatalysis Water splitting Seawater |
| Zdroj: | Applied Surface Science. 572:151346 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2021.151346 |
| Popis: | Solar-driven photocatalytic seawater splitting for hydrogen is a promising process because of unlimited solar energy and seawater available. A novel Pt/GaP-C3N4 (PGC) heterogeneous photocatalyst was fabricated and used for photocatalytic artificial and natural seawater splitting under simulated sunlight illumination. The hybrid heterojunction structure of GaP-C3N4 promotes a Z-schematic electron migration and depresses the recombination rate of photogenerated electron-hole pairs in PGC photocatalyst. Under 4-hour simulated sunlight irradiation, the optimum composite 0.3PGC50 (0.3 wt% Pt-loaded and 50 wt% GaP-composited) exhibited high photoactivity performance with the hydrogen/oxygen evolution rate (HER/OER) of 46.5/23.4 µmol g−1 in deionized water, 65.5/34.3 µmol g−1 in the artificial seawater, and 53.9/24.9 µmol g−1 in the natural seawater splitting process. The apparent quantum yield of artificial seawater is near two times higher than that of pure water. The molar ratio of H2:O2 was near 2:1 matched whole water splitting, and the H2 yields were moderately decreased after 3 consecutive runs. |
| Databáze: | OpenAIRE |
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