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Title: Shape regulation of high-index facet nanoparticles by dealloying

Abstract

Tetrahexahedral particles (~10 to ~500 nanometers) composed of platinum (Pt), palladium, rhodium, nickel, and cobalt, as well as a library of bimetallic compositions, were synthesized on silicon wafers and on catalytic supports by a ligand-free, solid-state reaction that used trace elements [antimony (Sb), bismuth (Bi), lead, or tellurium] to stabilize high-index facets. Both simulation and experiment confirmed that this method stabilized the {210} planes. A study of the PtSb system showed that the tetrahexahedron shape resulted from the evaporative removal of Sb from the initial alloy—a shape-regulating process fundamentally different from solution-phase, ligand-dependent processes. The current density at a fixed potential for the electro-oxidation of formic acid with a commercial Pt/carbon catalyst increased by a factor of 20 after transformation with Bi into tetrahexahedral particles.

Authors:
ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1561411
Grant/Contract Number:  
SC0000989
Resource Type:
Published Article
Journal Name:
Science
Additional Journal Information:
Journal Name: Science Journal Volume: 365 Journal Issue: 6458; Journal ID: ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)
Country of Publication:
United States
Language:
English

Citation Formats

Huang, Liliang, Liu, Mohan, Lin, Haixin, Xu, Yaobin, Wu, Jinsong, Dravid, Vinayak P., Wolverton, Chris, and Mirkin, Chad A. Shape regulation of high-index facet nanoparticles by dealloying. United States: N. p., 2019. Web. https://doi.org/10.1126/science.aax5843.
Huang, Liliang, Liu, Mohan, Lin, Haixin, Xu, Yaobin, Wu, Jinsong, Dravid, Vinayak P., Wolverton, Chris, & Mirkin, Chad A. Shape regulation of high-index facet nanoparticles by dealloying. United States. https://doi.org/10.1126/science.aax5843
Huang, Liliang, Liu, Mohan, Lin, Haixin, Xu, Yaobin, Wu, Jinsong, Dravid, Vinayak P., Wolverton, Chris, and Mirkin, Chad A. Thu . "Shape regulation of high-index facet nanoparticles by dealloying". United States. https://doi.org/10.1126/science.aax5843.
@article{osti_1561411,
title = {Shape regulation of high-index facet nanoparticles by dealloying},
author = {Huang, Liliang and Liu, Mohan and Lin, Haixin and Xu, Yaobin and Wu, Jinsong and Dravid, Vinayak P. and Wolverton, Chris and Mirkin, Chad A.},
abstractNote = {Tetrahexahedral particles (~10 to ~500 nanometers) composed of platinum (Pt), palladium, rhodium, nickel, and cobalt, as well as a library of bimetallic compositions, were synthesized on silicon wafers and on catalytic supports by a ligand-free, solid-state reaction that used trace elements [antimony (Sb), bismuth (Bi), lead, or tellurium] to stabilize high-index facets. Both simulation and experiment confirmed that this method stabilized the {210} planes. A study of the PtSb system showed that the tetrahexahedron shape resulted from the evaporative removal of Sb from the initial alloy—a shape-regulating process fundamentally different from solution-phase, ligand-dependent processes. The current density at a fixed potential for the electro-oxidation of formic acid with a commercial Pt/carbon catalyst increased by a factor of 20 after transformation with Bi into tetrahexahedral particles.},
doi = {10.1126/science.aax5843},
journal = {Science},
number = 6458,
volume = 365,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1126/science.aax5843

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Cited by: 13 works
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