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Designing ultrastable Pt/CeO2-Al2O3 nanosheet catalysts for three-way catalysts applications
Abstract
Designing Rh-free, especially Pt-only, three-way catalysts with improved low-temperature activity/stability is highly desirable. Herein, we demonstrate that ultrastable Pt/CeO2-Al2O3 nanosheet catalysts can be obtained based on a Sabatier principle of metal-support interaction. Tuning the surface coverage of penta-site rich γ-Al2O3 nanosheets (AlNS, weak adhesion to Pt) by CeO2 “nano-islands” (strong adhesion to Pt) can lead to the synthesis of Pt/60 wt.%CeO2-AlNS that have lower light-off temperatures for CO, hydrocarbons, and NO compared to conventional Pt/CeO2 and Pt/Al2O3 catalysts by 100–200°C and a similar performance with the state-of-the-art Rh-based catalyst. Further, incorporating CeO2 on the surface of AlNS can retard the sintering of CeO2 during harsh redox hydrothermal aging, associate with the strong interaction between CeO2 “nano-island” and penta-site rich γ-Al2O3 nanosheets. Moreover, the improved activity/stability of Pt/CeO2-AlNS catalysts can be attributed to tuning of the Pt detachment and migration from and back to the CeO2 “nano-islands”, respectively, that keeps Pt as nanoclusters on CeO2, the most active species for three-way catalyst applications.
- Authors:
-
[3];
[2];
[1]
- State Univ. of New York at Buffalo, NY (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Science Foundation (NSF)
- OSTI Identifier:
- 2217734
- Grant/Contract Number:
- AC05-00OR22725; DMR-1828731
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Chemical Engineering Journal
- Additional Journal Information:
- Journal Volume: 477; Journal ID: ISSN 1385-8947
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Heterogeneous catalysis; Sabatier principle; Metal-support interaction; Three-way catalyst
Citation Formats
Chen, Junjie, Liu, Chih-Han, Pham, Hien N., Toops, Todd J., Datye, Abhaya K., and Kyriakidou, Eleni A. Designing ultrastable Pt/CeO2-Al2O3 nanosheet catalysts for three-way catalysts applications. United States: N. p., 2023.
Web. doi:10.1016/j.cej.2023.147086.
Chen, Junjie, Liu, Chih-Han, Pham, Hien N., Toops, Todd J., Datye, Abhaya K., & Kyriakidou, Eleni A. Designing ultrastable Pt/CeO2-Al2O3 nanosheet catalysts for three-way catalysts applications. United States. https://doi.org/10.1016/j.cej.2023.147086
Chen, Junjie, Liu, Chih-Han, Pham, Hien N., Toops, Todd J., Datye, Abhaya K., and Kyriakidou, Eleni A. Thu .
"Designing ultrastable Pt/CeO2-Al2O3 nanosheet catalysts for three-way catalysts applications". United States. https://doi.org/10.1016/j.cej.2023.147086.
@article{osti_2217734,
title = {Designing ultrastable Pt/CeO2-Al2O3 nanosheet catalysts for three-way catalysts applications},
author = {Chen, Junjie and Liu, Chih-Han and Pham, Hien N. and Toops, Todd J. and Datye, Abhaya K. and Kyriakidou, Eleni A.},
abstractNote = {Designing Rh-free, especially Pt-only, three-way catalysts with improved low-temperature activity/stability is highly desirable. Herein, we demonstrate that ultrastable Pt/CeO2-Al2O3 nanosheet catalysts can be obtained based on a Sabatier principle of metal-support interaction. Tuning the surface coverage of penta-site rich γ-Al2O3 nanosheets (AlNS, weak adhesion to Pt) by CeO2 “nano-islands” (strong adhesion to Pt) can lead to the synthesis of Pt/60 wt.%CeO2-AlNS that have lower light-off temperatures for CO, hydrocarbons, and NO compared to conventional Pt/CeO2 and Pt/Al2O3 catalysts by 100–200°C and a similar performance with the state-of-the-art Rh-based catalyst. Further, incorporating CeO2 on the surface of AlNS can retard the sintering of CeO2 during harsh redox hydrothermal aging, associate with the strong interaction between CeO2 “nano-island” and penta-site rich γ-Al2O3 nanosheets. Moreover, the improved activity/stability of Pt/CeO2-AlNS catalysts can be attributed to tuning of the Pt detachment and migration from and back to the CeO2 “nano-islands”, respectively, that keeps Pt as nanoclusters on CeO2, the most active species for three-way catalyst applications.},
doi = {10.1016/j.cej.2023.147086},
journal = {Chemical Engineering Journal},
number = ,
volume = 477,
place = {United States},
year = {Thu Nov 02 00:00:00 EDT 2023},
month = {Thu Nov 02 00:00:00 EDT 2023}
}
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