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The catalyst strcuture for photo-induced energetic hot carriers has been attracting burgeoning curiosity and providing quantum efficiencies in plasmon-mediated photothermal catalysis and external heat coupled photocatalysis. Different catalysts of supported platinum quantum dots are used in photo, thermal, and photothermal catalytic dry resynthesis of methane herein. On Pt/P25 and the Pt/Al2O3 interface, respectively, the hot zones of Pt/photothermal catalysis have been identified as the Pt/P25 and the Pt/Al2O3 interface. However, a change of the active sites to the Pt surface on Pt/P25 is the first time observed in Ephotothermal catalysis.
With its broad application prospects in environmental protection and renewable energy, dry reforming of CH4 can convert greenhouse gases into high-valued fuels and chemicals. Nonthermal plasma is considered a more cost-effective alternative strategy because it can produce CH4 and CO2 under low temperature and atmospheric pressure. This paper is designed to optimize the plasma-assisted dry reforming of CH4 during a single pulsed coaxial dielectric barrier discharge by investigating reactor structures. The maximal conversions of CH4 and CO2 were 20. 4% and 14. 1% under our experimental conditions, with an energy conversion rate of 4. 4%. Ch4 conversion was up to 27 percent with a moderate energy conversion rate of 3. 8 percent, but when packing materials were mixed into the reactor, the conversion of CO2 was only 12%.
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