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Abstract：
A series of ceria (CeO2) modified MgAl2O4 spinels were used to support silver nanoparticles (Ag/MgAl2O4-Ce) and tested for catalytic soot oxidation. This solid composition presents outstanding catalytic activity for soot oxidation, namely, initial reaction temperature, T-i = 236 degrees C, and temperature of maximum reaction rate, T-m = 359 degrees C. In contrast to Ag/MgAl2O4, the presence of CeO2 enhanced significantly the formation of superoxide and peroxide surface adsorbed oxygen species, thereby largely promoting the catalytic performance in soot oxidation. Induced by the strong interactions between Ag and CeO2, Ag/MgAl2O4-Ce displays higher Ag metal dispersion with excellent thermal stability than Ag/MgAl2O4 catalyst. This explains well the absence of deactivation for the Ag/MgAl2O4-Ce catalyst after five cycles of soot combustion.
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CATALYSIS COMMUNICATIONS
ISSN： 1566-7367
Year： 2018
Volume： 111
Page： 26-30
3 . 6 7 4
JCR@2018
3 . 4 0 0
JCR@2023
ESI Discipline： CHEMISTRY;
ESI HC Threshold：209
JCR Journal Grade：2
CAS Journal Grade：3
Cited Count：
WoS CC Cited Count： 14
SCOPUS Cited Count： 14
ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
Chinese Cited Count：
30 Days PV： 1
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