Oxidation-induced structural changes in sub-nanometer platinum supported on alumina
Abstract
Platinum supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of platinum particles supported on a variety of supports have been extensively studied; however, available experimental information on the behavior of single vs. sub-nanometer platinum is extremely limited. To bridge the knowledge gap between single supported platinum and well-formed supported platinum nanoparticles, we have carried out synthesis, characterization, and CO and NO oxidation studies of sub-nanometer platinum supported on α, θ, and γ-Al2O3 and monitored changes in structure upon exposure to CO and NO oxidation conditions. Furthermore, we find that sub-nanometer Pt is highly effective for CO oxidation due to high platinum dispersion but is not very efficient as NO oxidation catalyst. Lastly, sub-nanometer platinum agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy & Transportation Science Div.
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1187918
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ChemCatChem
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 15; Journal ID: ISSN 1867-3880
- Publisher:
- ChemPubSoc Europe
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; catalysis; catalysts; heterogeneous catalysis; emission treatment; oxidation reactions
Citation Formats
DeBusk, Melanie Moses, Allard, Jr, Lawrence Frederick, Blom, Douglas Allen, and Narula, Chaitanya Kumar. Oxidation-induced structural changes in sub-nanometer platinum supported on alumina. United States: N. p., 2015.
Web. doi:10.1002/cctc.201500267.
DeBusk, Melanie Moses, Allard, Jr, Lawrence Frederick, Blom, Douglas Allen, & Narula, Chaitanya Kumar. Oxidation-induced structural changes in sub-nanometer platinum supported on alumina. United States. https://doi.org/10.1002/cctc.201500267
DeBusk, Melanie Moses, Allard, Jr, Lawrence Frederick, Blom, Douglas Allen, and Narula, Chaitanya Kumar. Fri .
"Oxidation-induced structural changes in sub-nanometer platinum supported on alumina". United States. https://doi.org/10.1002/cctc.201500267. https://www.osti.gov/servlets/purl/1187918.
@article{osti_1187918,
title = {Oxidation-induced structural changes in sub-nanometer platinum supported on alumina},
author = {DeBusk, Melanie Moses and Allard, Jr, Lawrence Frederick and Blom, Douglas Allen and Narula, Chaitanya Kumar},
abstractNote = {Platinum supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of platinum particles supported on a variety of supports have been extensively studied; however, available experimental information on the behavior of single vs. sub-nanometer platinum is extremely limited. To bridge the knowledge gap between single supported platinum and well-formed supported platinum nanoparticles, we have carried out synthesis, characterization, and CO and NO oxidation studies of sub-nanometer platinum supported on α, θ, and γ-Al2O3 and monitored changes in structure upon exposure to CO and NO oxidation conditions. Furthermore, we find that sub-nanometer Pt is highly effective for CO oxidation due to high platinum dispersion but is not very efficient as NO oxidation catalyst. Lastly, sub-nanometer platinum agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.},
doi = {10.1002/cctc.201500267},
journal = {ChemCatChem},
number = 15,
volume = 7,
place = {United States},
year = {Fri Jun 26 00:00:00 EDT 2015},
month = {Fri Jun 26 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
Stability investigation of a high number density Pt 1 /Fe 2 O 3 single-atom catalyst under different gas environments by HAADF-STEM
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