Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt
Abstract
Here, a systematic study of the roles played by Pd seeds during seed-mediated coreduction of Pd–Pt is presented. Either nanoparticles with porous, hollow architectures or concave nanocubes were achieved, depending on whether the synthesis conditions favored galvanic replacement or overgrowth. Prior works have shown that the galvanic replacement reaction between seeds and a precursor can be suppressed by introducing a faster, parallel reaction that removes one of the reagents (e.g., adatom generation in solution rather than surface-catalyzed precursor reduction). Here, we show that the galvanic replacement reaction depends on the size and concentration of the Pd seeds; the former of which can be manipulated during the course of the reaction through the use of a secondary reducing agent. This insight will guide future syntheses of multimetallic nanostructures by seeded methods, allowing for a range of nanocrystals to be precisely engineered for a variety of applications.
- Authors:
-
[1]
- Department of Chemistry, Indiana University Bloomington, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
- Publication Date:
- Research Org.:
- Indiana Univ., Bloomington, IN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1432416
- Alternate Identifier(s):
- OSTI ID: 1482341
- Grant/Contract Number:
- SC0010489
- Resource Type:
- Published Article
- Journal Name:
- ACS Omega
- Additional Journal Information:
- Journal Name: ACS Omega Journal Volume: 3 Journal Issue: 4; Journal ID: ISSN 2470-1343
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; deposition process; heat transfer; nanoparticles; physical and chemical processes; physical and chemical properties; redox potential; redox reaction; surface structure
Citation Formats
Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., and Skrabalak, Sara E. Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt. United States: N. p., 2018.
Web. doi:10.1021/acsomega.8b00394.
Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., & Skrabalak, Sara E. Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt. United States. https://doi.org/10.1021/acsomega.8b00394
Ataee-Esfahani, Hamed, Koczkur, Kallum M., Weiner, Rebecca G., and Skrabalak, Sara E. Mon .
"Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt". United States. https://doi.org/10.1021/acsomega.8b00394.
@article{osti_1432416,
title = {Overgrowth Versus Galvanic Replacement: Mechanistic Roles of Pd Seeds during the Deposition of Pd–Pt},
author = {Ataee-Esfahani, Hamed and Koczkur, Kallum M. and Weiner, Rebecca G. and Skrabalak, Sara E.},
abstractNote = {Here, a systematic study of the roles played by Pd seeds during seed-mediated coreduction of Pd–Pt is presented. Either nanoparticles with porous, hollow architectures or concave nanocubes were achieved, depending on whether the synthesis conditions favored galvanic replacement or overgrowth. Prior works have shown that the galvanic replacement reaction between seeds and a precursor can be suppressed by introducing a faster, parallel reaction that removes one of the reagents (e.g., adatom generation in solution rather than surface-catalyzed precursor reduction). Here, we show that the galvanic replacement reaction depends on the size and concentration of the Pd seeds; the former of which can be manipulated during the course of the reaction through the use of a secondary reducing agent. This insight will guide future syntheses of multimetallic nanostructures by seeded methods, allowing for a range of nanocrystals to be precisely engineered for a variety of applications.},
doi = {10.1021/acsomega.8b00394},
journal = {ACS Omega},
number = 4,
volume = 3,
place = {United States},
year = {Mon Apr 09 00:00:00 EDT 2018},
month = {Mon Apr 09 00:00:00 EDT 2018}
}
https://doi.org/10.1021/acsomega.8b00394
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