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Title: Synthesis of PtCo3 polyhedral nanoparticles and evolution to Pt3Co nanoframes

Abstract

Bimetallic nanoframes have great potential for achieving new levels of catalytic activity in various heterogeneous reactions due to their high surface area dispersion of expensive noble metals on the exterior and interior surfaces of the structure. PtCo3 nanoparticles with polyhedral shapes were synthesized by a hot-injection method. Scanning transmission electron microscopy combined with energy dispersive X-ray spectroscopy (EDS) showed that these nanoparticles demonstrated elemental segregation of platinum to the edges of the polyhedron, forming the basis for a framework nanostructure. The process of preferential oxidative leaching which removed cobalt from the interior of the framework was tracked by EDS and inductively coupled plasma optical emission spectroscopy. This evolution procedure left the platinum-rich edges intact to form a Pt3Co nanoframe. Finally, this is the first reported synthesis of a platinum-cobalt nanoframe and could have potential applications in catalytic reactions such as oxygen reduction.

Authors:
 [1];  [1];  [2];  [1];  [3]
+ Show Author Affiliations
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tsinghua Univ., Beijing (China)
  3. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1832536
Alternate Identifier(s):
OSTI ID: 1251761
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Surface Science
Additional Journal Information:
Journal Volume: 648; Journal ID: ISSN 0039-6028
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; platinum; cobalt; bimetallic; nanoframe

Citation Formats

Becknell, Nigel, Zheng, Cindy, Chen, Chen, Yu, Yi, and Yang, Peidong. Synthesis of PtCo3 polyhedral nanoparticles and evolution to Pt3Co nanoframes. United States: N. p., 2015. Web. doi:10.1016/j.susc.2015.09.024.
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Becknell, Nigel, Zheng, Cindy, Chen, Chen, Yu, Yi, & Yang, Peidong. Synthesis of PtCo3 polyhedral nanoparticles and evolution to Pt3Co nanoframes. United States. https://doi.org/10.1016/j.susc.2015.09.024
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Becknell, Nigel, Zheng, Cindy, Chen, Chen, Yu, Yi, and Yang, Peidong. Thu . "Synthesis of PtCo3 polyhedral nanoparticles and evolution to Pt3Co nanoframes". United States. https://doi.org/10.1016/j.susc.2015.09.024. https://www.osti.gov/servlets/purl/1832536.
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@article{osti_1832536,
title = {Synthesis of PtCo3 polyhedral nanoparticles and evolution to Pt3Co nanoframes},
author = {Becknell, Nigel and Zheng, Cindy and Chen, Chen and Yu, Yi and Yang, Peidong},
abstractNote = {Bimetallic nanoframes have great potential for achieving new levels of catalytic activity in various heterogeneous reactions due to their high surface area dispersion of expensive noble metals on the exterior and interior surfaces of the structure. PtCo3 nanoparticles with polyhedral shapes were synthesized by a hot-injection method. Scanning transmission electron microscopy combined with energy dispersive X-ray spectroscopy (EDS) showed that these nanoparticles demonstrated elemental segregation of platinum to the edges of the polyhedron, forming the basis for a framework nanostructure. The process of preferential oxidative leaching which removed cobalt from the interior of the framework was tracked by EDS and inductively coupled plasma optical emission spectroscopy. This evolution procedure left the platinum-rich edges intact to form a Pt3Co nanoframe. Finally, this is the first reported synthesis of a platinum-cobalt nanoframe and could have potential applications in catalytic reactions such as oxygen reduction.},
doi = {10.1016/j.susc.2015.09.024},
journal = {Surface Science},
number = ,
volume = 648,
place = {United States},
year = {Thu Oct 08 00:00:00 EDT 2015},
month = {Thu Oct 08 00:00:00 EDT 2015}
}
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https://doi.org/10.1016/j.susc.2015.09.024
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