Abstract
A series of Mn1−xAgxCo2O4 spinel-type catalysts that can promote soot removal were prepared by a sol-gel method along with the characterization of physical and chemical properties. The results show that the selected catalysts feature a spinel-type structure, and Ag phase for Ag-substituted Mn1−xAgxCo2O4 with Ag molar ratio higher than 0.1, and the introduced Ag+ can also tailor the distribution of oxygen species, as such, enhance the formation of the adsorbed oxygen species. Mn0.6Ag0.4Co2O4 demonstrates a superior activity with a T50 of 325°C, with a reduction of 122°C compared to MnCo2O4, and CO2 selectivity of 97%, which is strongly relevant to the substituted Ag+ ions.
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