1. Improved low-temperature catalytic oxidation performance of Pt-based catalysts by modulating the electronic and size effects.
- Author
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Liang, Yanli, Ding, Xinmei, Wang, Jianli, Zhao, Ming, Dan, Yi, Jiang, Long, and Chen, Yaoqiang
- Subjects
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CATALYTIC oxidation , *POLAR effects (Chemistry) , *POLYVINYL alcohol , *WATER gas shift reactions , *PLATINUM nanoparticles , *OXIDATION of carbon monoxide , *ORGANIC conductors , *CATALYSTS - Abstract
Polyvinyl alcohol (PVA) has been shown to interact with platinum ions by manipulating the reaction time. It was interestingly found that the improved low-temperature oxidation performance of Pt-based catalysts in promoting the conversion of CO/C3H6/NO was mainly contributed to by a higher content of metallic platinum species, accompanied by relatively smaller platinum nanoparticle size. Besides, DTA and in situ DRIFTs of the un-roasted catalysts showed that an appropriate reaction time (10 h) between the platinum ions and polyvinyl alcohol resulted in a strong electronic intensity of the platinum. Both these factors led to a greater formation of formate species and the lowest light-off temperature of CO (176 °C), C3H6 (187 °C), and NO (214 °C). This simple method involving tuning the interaction of polymer and metal ions would be positive for optimizing the electronic state and size efffect of metals in catalysis. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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