Facile synthesis of ultra-fine nanoporous Pt co-catalyst decorated on P25 and its highly efficient photocatalytic activity
| Autor: | Ruimin Yu, Shuxia Guan, Lei Ji, Yongkui Fang, Fanzuo Guo |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Nanoporous General Chemical Engineering Schottky barrier General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis Semiconductor Chemical engineering Surface-area-to-volume ratio Photocatalysis General Materials Science 0210 nano-technology business Photocatalytic water splitting |
| Zdroj: | Ionics. 27:1633-1643 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-021-03958-6 |
| Popis: | Pt is typically decorated as co-catalyst on semiconductor to promote the photocatalytic activity. It is imperative to design more active photocatalyst with minimized co-catalyst loading due to the low abundance and high cost of Pt. In this work, ultra-fine nanoporous Pt particle co-catalysts decorated on P25 were facilely prepared via facile and operable chemical reduction alloying-dealloying strategy. The obtained optimized photocatalyst exhibited more than 3- and 4-times enhancement in photocatalytic water splitting for H2 evolution and degradation of methylene blue compared with reference sample loaded with solid Pt under same loading. This beneficial effect was ascribed to the following factor: nanoporous Pt co-catalyst supply more branches as combinative sites with P25 which form effective Schottky junction to drive the separation of photogenerated carriers and also inhibit their recombinations. Moreover, the ultra-fine nanoporous Pt co-catalysts provide increased surface area to volume ratio and more active sites for photocatalytic reaction. |
| Databáze: | OpenAIRE |
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