首页|Atomic rearrangement on YMn2O5 modified Pt-based diesel oxidation catalyst for promoted performance
Atomic rearrangement on YMn2O5 modified Pt-based diesel oxidation catalyst for promoted performance
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NSTL
To improve the stability of Pt nanoparticles,the redox cycles with oxidation at 800 ℃ and reduction at 250 ℃ for three times were adopted on the Mn-mullite doped Pt-based catalysts(Pt-YMO/SA-Red)to rearrange the Pt atoms.The light-off temperature toward CO/C3H6/NO oxidation on Pt-YMO/SA-Red decreases by 20-60 ℃,and the NO maximum conversion is improved by 27 % than the catalyst with only oxidation treatment at 800 ℃(Pt-YMO/SA-Oxi).Characterization results verify that the interaction of Pt with YMn2O5 on Pt-YMO/SA-Red is reinforced via redox cyclic treatment to inhibit the aggregation of platinum particles and promote the formation of active oxygen species,in comparison to Pt-YMO/SA-Oxi.The easier active oxygen regeneration and more active platinum sites contribute to the excellent catalytic performances and stability.In addition,the mechanism for the high CO/C3H6/NO oxidation performance are analyzed via the detected reaction intermediate species.
NSTL
