AI Article Synopsis
- Plasma-catalytic oxidation of particulate matter (PM) could significantly improve diesel exhaust cleaning efforts, highlighting the need for better understanding of how carbonaceous PM is oxidized.
- The study utilized Au/γ-AlO as a catalyst to aid the gasification of graphitic carbon and used advanced spectrometric techniques to observe surface reactions and products.
- Key findings show that oxygen atoms are crucial in creating surface oxygen complexes that assist in converting these complexes into carbon monoxide (CO), providing insights for developing more effective plasma catalysts.
Article Abstract
Plasma-catalytic oxidation of particulate matter (PM) has potential applications for diesel exhaust cleaning. There is a grand requirement to explore the mechanism of carbonaceous PM oxidation for the development of plasma catalysts. Herein, Au/γ-AlO was used to catalyze the gasification of the graphitic carbon. A modified diffuse reflectance infrared Fourier transform spectrometer equipped with a mass spectrometer was originally utilized to in situ characterize the surface intermediates of graphite on Au/γ-AlO and the gaseous products during the discharges processes in the O-He balanced gases. It was found that O atoms and O play important roles in the formation of surface oxygen complexes (SOCs) and facilitate the gasification of SOCs to CO in the presence of Au/γ-AlO. The findings are helpful to understand the plasma-catalytic oxidation mechanism of PM and further develop efficient plasma catalysts.
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| http://dx.doi.org/10.1016/j.jhazmat.2020.122730 | DOI Listing |
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