AUTHOR=Li Qian , Su Yimin , Liu Xuesong , Lv Yanan , Zhang Nana , Xin Ying , Zhang Zhaoliang 

TITLE=Improved Intrinsic Activity of Ce0.5Pr0.5O2 for Soot Combustion by Vacuum/Freeze-Drying

JOURNAL=Frontiers in Environmental Chemistry

VOLUME=2

YEAR=2021

URL=https://www.frontiersin.org/journals/environmental-chemistry/articles/10.3389/fenvc.2021.653402

DOI=10.3389/fenvc.2021.653402

ISSN=2673-4486

ABSTRACT=<p>Vacuum-drying and freeze-drying were adopted to improve the catalytic activity of Ce<sub>0.5</sub>Pr<sub>0.5</sub>O<sub>2</sub> for soot combustion. The specific surface area and pore volume of the as-prepared Ce<sub>0.5</sub>Pr<sub>0.5</sub>O<sub>2</sub> were greatly increased compared to the counterpart using the common drying method. Furthermore, the redox performance and the oxidation ability for soot were enhanced, as demonstrated by H<sub>2</sub>-TPR and soot-TPR. Thus, lower combustion temperatures and higher intrinsic activity were obtained. This work demonstrated that simply changing the drying process of precipitates can be served as a paradigm to improve the structure and catalytic performance.</p>