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Outline
The size of Pt nanoparticles exerts a significant influence on the catalytic degradation performance of Pt-based supported catalysts for the treatment of volatile organic compounds (VOCs, volatile organic chemicals). Herein, uniform Pt nanoparticles were successfully fabricated via liquid phase reduction method and followed deposited on Al2O3 through in-situ growth method. It had to noted that the loaded Pt nanoparticles with different sizes had no effect on the textural properties, morphologies and the dispersion of Pt species, etc. The conversion activity of toluene and ethyl acetate were increased with the decline of Pt nanoparticles size. It could be explained by the enhanced interaction between Pt and Al2O3 with the decreased Pt size (18nm vs 6nm). Partial electrons could be transformed from Pt to Al2O3 to improve the contents of Pt2+(13% vs 36%), in the meantime, the amounts of active oxygen species (Oads) also increased (32% vs 80%). Fortunately, the synergistic effect between Pt2+ and Oads boosted the redox of Pt/Al2O3 as well as the catalytic performance of toluene (216℃ vs 178℃) and ethyl acetate degradation (312℃ vs 258℃). The results will provide theoretical direction for the design of highly active supported Pt-based catalysts.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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