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Pt/Al2O3 for Efficient CF4 Hydrolytic Decomposition
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DOI：10.3390/catal16080705.png)
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Abstract
En 中文
Tetrafluoromethane (CF4) is one of the most stable perfluorinated compounds because of its highly symmetric molecular structure and extremely strong C–F bonds. Catalytic hydrolysis provides a promising route for CF4 abatement, yet the development of efficient catalysts capable of activating C–F bonds at reduced temperatures remains challenging. Herein, Pt-modified Al2O3 catalysts were prepared to promote CF4 decomposition through the regulation of surface acidity, CF4 adsorption, and hydroxyl formation. NH3 temperature-programmed desorption revealed that Pt introduction significantly enhanced the surface acidity of Al2O3, while CF4 temperature-programmed desorption demonstrated strengthened CF4 adsorption over Pt/Al2O3. In situ infrared spectroscopy further showed that Pt incorporation promoted the generation of surface hydroxyl groups under reaction-relevant conditions. These hydroxyl species are proposed to participate in C–F bond activation during CF4 hydrolysis. As a result, Pt/Al2O3 achieved complete CF4 decomposition at 600 °C and maintained excellent stability during the long-term test, clearly outperforming pristine Al2O3. This work demonstrates that Pt/Al2O3 is an effective catalyst for CF4 decomposition by coupling enhanced acidity, improved CF4 adsorption, and hydroxyl-assisted C–F bond activation.
Keywords:
Al<sub>2</sub>O<sub>3</sub>
C–F bond activation
CF<sub>4</sub> catalytic hydrolysis
hydroxyls
Journal
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4
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1.2W
Citations:
3.4W
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