Abstract
In this work, model α-Fe2O3 catalysts with different morphologies were synthesized to investigate crystal plane effects on soot oxidation. The results revealed that the electron-rich state of Fe2O3 {113} planes conferred them more surface Ox− and thus better catalytic performance than the {014} and {012} planes. Surface grafting of a polycrystalline CeO2 layer onto Fe2O3 gave rise to Fe2O3@CeO2 catalysts with drastically increased oxygen utilization. More importantly, by loading Ag nano-particles on the surface of Fe2O3@CeO2, a tandem oxygen delivery route was opened, resulting in strong Ox- generation/regeneration ability and superior low temperature soot oxidation activity. These Ag/Fe2O3@CeO2 catalysts overwhelmed the nano-cubic Ag/CeO2 in both catalyst cost and activity, making them very promising for application in catalyzed gasoline particulate filters (CGPFs).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
