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Published in: Rare Metals 2/2024

14-11-2023 | Original Article

A novel Ce0.485Zr0.485Y0.03O2 composite oxide with surface doping of Y and its application in Pd-only three-way catalyst

Authors: Zheng Zhao, Wei-Xin Zhao, Yong-Qi Zhang, Mei-Sheng Cui, Yong-Ke Hou, Dong-Ming Chen, Juan-Yu Yang, Zong-Yu Feng, Xiao-Wei Huang

Published in: Rare Metals | Issue 2/2024

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Abstract

The ceria-zirconia compound oxide-supported noble metal Pd (Pd@CZ) is widely used in three-way catalyst. Moreover, the surface structure of CZ plays an important role in catalytic activity of Pd. However, how to regulate the surface structure of CZ and clarify the structure–activity relationship is still a challenge. In this paper, a strategy is proposed to develop high activity Pd@CZ nanocatalysts by tuning Y doping sites in CZ. The precipitate-deposition method is developed to prepare the novel Ce0.485Zr0.485Y0.03O2 composite with surface doping of Y (CZ-Y-S). In addition, the Pd@CZ-Y-S (Pd supported on CZ-Y-S) exhibits superior catalytic activity for HC, CO, and NO oxide, wherein, for CO and C3H6 oxidation, the low-temperature activity of Pd@CZ-Y-S is still 20% higher than that of Pd@CZ-Y-B (Y bulk doping) and commercial Pd@CZ after 1000 °C/4 h aging. The effect mechanism is further studied by density functional theory (DFT) calculation. Compared with Pd@CZ-Y-B, Pd@CZ-Y-S shows the lower CO oxide reaction energy barriers due to the weaker adsorption strength of O2. The Y surface doping strategy could provide valuable insights for the development of highly efficient Pd@CZ catalyst with extensive applications.

Graphical Abstract

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Appendix
Available only for authorised users
Literature
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go back to reference Shan S, Petkon V, Prasai B, Wu JF, Joseph P, Skeete Z, Kim E, Mott D, Malis O, Luo J, Zhong CJ. Catalytic activity of bimetallic catalysts highly sensitive to the atomic composition and phase structure at the nanoscale. Nanoscale. 2015;7:18936. https://doi.org/10.1039/C5NR04535E.CrossRef Shan S, Petkon V, Prasai B, Wu JF, Joseph P, Skeete Z, Kim E, Mott D, Malis O, Luo J, Zhong CJ. Catalytic activity of bimetallic catalysts highly sensitive to the atomic composition and phase structure at the nanoscale. Nanoscale. 2015;7:18936. https://​doi.​org/​10.​1039/​C5NR04535E.CrossRef
Metadata
Title
A novel Ce0.485Zr0.485Y0.03O2 composite oxide with surface doping of Y and its application in Pd-only three-way catalyst
Authors
Zheng Zhao
Wei-Xin Zhao
Yong-Qi Zhang
Mei-Sheng Cui
Yong-Ke Hou
Dong-Ming Chen
Juan-Yu Yang
Zong-Yu Feng
Xiao-Wei Huang
Publication date
14-11-2023
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 2/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-023-02495-7

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