A pathway for the growth of core-shell Pt-Pd nanoparticles
Abstract
In this study, the aging of both Pt-Pd nanoparticles and core-shell Pt-Pd nanoparticles has been reported to result in alloying of Pt with Pd. In comparison to monometallic Pt catalysts, the growth of Pd-Pt bimetallics is slower; however, the mechanism of growth of particles and the mechanism by which Pd improves the hydrothermal durability of bimetallic Pd-Pt particles remains uncertain. In our work on hydrothermal aging of core-shell Pt-Pd nanoparticles, synthesized by solution methods, with varying Pd:Pt ratio of 1:4, 1:1, and 4:1, we compare the growth of core-shell Pt-Pd nanoparticles and find that particles grow by migrating and joining together. The unique feature of the observed growth is that Pd shells from both particles open up and join, allowing the cores to merge. At high temperatures, alloying occurs in good agreement with reports by other workers.
- Authors:
-
- Oak Ridge National Lab. (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)
- OSTI Identifier:
- 1224172
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry. C
- Additional Journal Information:
- Journal Volume: 119; Journal Issue: 1; Journal ID: ISSN 1932-7447
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Narula, Chaitanya Kumar, Yang, Xiaofan, Li, Chen, Pennycook, Stephen J, and Lupini, Andrew R. A pathway for the growth of core-shell Pt-Pd nanoparticles. United States: N. p., 2015.
Web. doi:10.1021/acs.jpcc.5b08119.
Narula, Chaitanya Kumar, Yang, Xiaofan, Li, Chen, Pennycook, Stephen J, & Lupini, Andrew R. A pathway for the growth of core-shell Pt-Pd nanoparticles. United States. https://doi.org/10.1021/acs.jpcc.5b08119
Narula, Chaitanya Kumar, Yang, Xiaofan, Li, Chen, Pennycook, Stephen J, and Lupini, Andrew R. Mon .
"A pathway for the growth of core-shell Pt-Pd nanoparticles". United States. https://doi.org/10.1021/acs.jpcc.5b08119. https://www.osti.gov/servlets/purl/1224172.
@article{osti_1224172,
title = {A pathway for the growth of core-shell Pt-Pd nanoparticles},
author = {Narula, Chaitanya Kumar and Yang, Xiaofan and Li, Chen and Pennycook, Stephen J and Lupini, Andrew R},
abstractNote = {In this study, the aging of both Pt-Pd nanoparticles and core-shell Pt-Pd nanoparticles has been reported to result in alloying of Pt with Pd. In comparison to monometallic Pt catalysts, the growth of Pd-Pt bimetallics is slower; however, the mechanism of growth of particles and the mechanism by which Pd improves the hydrothermal durability of bimetallic Pd-Pt particles remains uncertain. In our work on hydrothermal aging of core-shell Pt-Pd nanoparticles, synthesized by solution methods, with varying Pd:Pt ratio of 1:4, 1:1, and 4:1, we compare the growth of core-shell Pt-Pd nanoparticles and find that particles grow by migrating and joining together. The unique feature of the observed growth is that Pd shells from both particles open up and join, allowing the cores to merge. At high temperatures, alloying occurs in good agreement with reports by other workers.},
doi = {10.1021/acs.jpcc.5b08119},
journal = {Journal of Physical Chemistry. C},
number = 1,
volume = 119,
place = {United States},
year = {Mon Oct 12 00:00:00 EDT 2015},
month = {Mon Oct 12 00:00:00 EDT 2015}
}
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