Journal
APPLIED CATALYSIS A-GENERAL
Volume 602, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2020.117732
Keywords
Core-shell structure; Thermal treatment; Three-way catalyst; Halloysite
Categories
Ask authors/readers for more resources
In this study, two types of core@shell nanoparticles, CeO2@Pd and inverse Pd@CeO2 nanoparticles, were synthesized by sequential deposition and electrostatic attraction-induced deposition method, respectively. Then, the core@shell nanoparticles supported on halloysite were thermally treated at different temperatures, and the nascent core@shell/H-x catalysts were characterized and evaluated for their three-way catalytic performance. During the thermal treatment (650 degrees C, 800 degrees C, and 1100 degrees C), the CeO2@Pd/H-x catalysts showed strong temperature sensitivity, resulting in aggregation of the active metal particles, degradation of the textural properties, and weak interactions between the active sites and support, accompanied by the deactivation of the three-way reaction. Remarkably, Pd@CeO2/H-800 exhibits excellent catalytic performance because it has an appropriate Pd-CeO2 interaction and high thermal stability, which effectively suppresses the encapsulation and aggregation of Pd@CeO2 nanoparticles and imparts a high content of Ce3+ species and oxygen vacancies and equivalent of Pd2+/Pd degrees ratio.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available