Tailoring Metal-Oxide Interfaces Via Selectively CeO-Decorated Pd Nanocatalysts with Enhanced Catalytic Performance

Overview

Journal Nanomaterials (Basel)

Date 2025 Feb 13

PMID 39940173

Authors

Ziwen Liu

Guizhen Zhang

Lijuan Niu

Zaicheng Sun

Zhenguo Li

Hong He

Affiliations

Soon will be listed here.

Abstract

Metal-oxide interfaces play a prominent role in heterogeneous catalysis. Tailoring the metal-oxide interfaces effectively enhance the catalytic activities and thermal stability of noble metal catalysts. In this work, polyvinyl alcohol-protected reduction and L-arginine induction methods are adopted to prepare Pd catalysts (Pd/AlO-xCeO) that are selectively decorated by CeO, which form core-shell-like structures and generate more Pd-CeO interfacial sites, so that the three-way catalytic activity of Pd/AlO-xCeO catalysts is obviously significantly enhanced due to more adsorption oxygen at the interface of Pd-CeO and good low-temperature reducibility. At the moment, the Pd/AlO-xCeO catalysts exhibit excellent thermal stability after being calcined at 900 °C for 5 h, owing to the Pd species being highly redispersed on CeO and part of the Pd species being incorporated into the lattice of CeO. This is a major reason for the Pd/AlO-xCeO catalysts to maintain high catalytic activity after aging at high temperatures. It is concluded that the metal-oxide interfaces and the interaction between Pd NPs and CeO are responsible for the excellent catalytic performance and stability of Pd/AlO-xCeO catalysts in three-way reactions.

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