Enhanced low temperature performance of bimetallic Pd/Pt/SiO2(core)@Zr(shell) diesel oxidation catalysts
Abstract
Here, in this study, the diesel oxidation performance of degreened (DG) and hydrothermally aged monometallic and bimetallic Pd/Pt/SiO2(core)@Zr(shell) catalysts with varying Pd/Pt molar ratios from 3/1–1/3 was evaluated. Pd/Pt(3/1)/SiO2 @Zr (DG) achieved 50% and 90% conversion of CO at 166 °C (T50), 169 °C (T90) and total hydrocarbons (THCs) at 198 °C (T50), 244 °C (T90). Decreasing the Pd/Pt molar ratio led to a decrease in the T50,90’s, with Pd/Pt(1/3)/SiO2 @Zr (DG) achieving T50,90’s at 153, 156 °C for CO and 171, 200 °C for THCs, respectively. Moreover, Pd/Pt(1/3)/SiO2@Zr showed enhanced hydrothermal stability. XRD and TEM showed that in the hydrothermally aged bimetallic catalysts, the fraction of Pd present as a Pt-Pd metallic alloy increased with Pt content. The enhanced low temperature performance of Pd/Pt(1/3)/SiO2@Zr compared to the other studied catalysts was attributed to Pd being primarily present in metallic form, despite being subjected to severe oxidizing conditions.
- Authors:
-
[2];
[1];
[1];
[3];
[2];
- State Univ. of New York (SUNY), Buffalo, NY (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Sciences Division
- 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:
- 1928930
- Grant/Contract Number:
- AC05-00OR22725; FG02-05ER15712; DMR-1828731
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Catalysis. B, Environmental
- Additional Journal Information:
- Journal Volume: 327; Journal ID: ISSN 0926-3373
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; core-shell support; diesel oxidation catalyst; hydrothermal stability; Pd/Pt alloy
Citation Formats
Liu, Chih-Han, Porter, Stephen, Chen, Junjie, Pham, Hien, Peterson, Eric J., Khatri, Prateek, Toops, Todd J., Datye, Abhaya, and Kyriakidou, Eleni A. Enhanced low temperature performance of bimetallic Pd/Pt/SiO2(core)@Zr(shell) diesel oxidation catalysts. United States: N. p., 2023.
Web. doi:10.1016/j.apcatb.2023.122436.
Liu, Chih-Han, Porter, Stephen, Chen, Junjie, Pham, Hien, Peterson, Eric J., Khatri, Prateek, Toops, Todd J., Datye, Abhaya, & Kyriakidou, Eleni A. Enhanced low temperature performance of bimetallic Pd/Pt/SiO2(core)@Zr(shell) diesel oxidation catalysts. United States. https://doi.org/10.1016/j.apcatb.2023.122436
Liu, Chih-Han, Porter, Stephen, Chen, Junjie, Pham, Hien, Peterson, Eric J., Khatri, Prateek, Toops, Todd J., Datye, Abhaya, and Kyriakidou, Eleni A. Tue .
"Enhanced low temperature performance of bimetallic Pd/Pt/SiO2(core)@Zr(shell) diesel oxidation catalysts". United States. https://doi.org/10.1016/j.apcatb.2023.122436. https://www.osti.gov/servlets/purl/1928930.
@article{osti_1928930,
title = {Enhanced low temperature performance of bimetallic Pd/Pt/SiO2(core)@Zr(shell) diesel oxidation catalysts},
author = {Liu, Chih-Han and Porter, Stephen and Chen, Junjie and Pham, Hien and Peterson, Eric J. and Khatri, Prateek and Toops, Todd J. and Datye, Abhaya and Kyriakidou, Eleni A.},
abstractNote = {Here, in this study, the diesel oxidation performance of degreened (DG) and hydrothermally aged monometallic and bimetallic Pd/Pt/SiO2(core)@Zr(shell) catalysts with varying Pd/Pt molar ratios from 3/1–1/3 was evaluated. Pd/Pt(3/1)/SiO2 @Zr (DG) achieved 50% and 90% conversion of CO at 166 °C (T50), 169 °C (T90) and total hydrocarbons (THCs) at 198 °C (T50), 244 °C (T90). Decreasing the Pd/Pt molar ratio led to a decrease in the T50,90’s, with Pd/Pt(1/3)/SiO2 @Zr (DG) achieving T50,90’s at 153, 156 °C for CO and 171, 200 °C for THCs, respectively. Moreover, Pd/Pt(1/3)/SiO2@Zr showed enhanced hydrothermal stability. XRD and TEM showed that in the hydrothermally aged bimetallic catalysts, the fraction of Pd present as a Pt-Pd metallic alloy increased with Pt content. The enhanced low temperature performance of Pd/Pt(1/3)/SiO2@Zr compared to the other studied catalysts was attributed to Pd being primarily present in metallic form, despite being subjected to severe oxidizing conditions.},
doi = {10.1016/j.apcatb.2023.122436},
journal = {Applied Catalysis. B, Environmental},
number = ,
volume = 327,
place = {United States},
year = {Tue Feb 07 00:00:00 EST 2023},
month = {Tue Feb 07 00:00:00 EST 2023}
}
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