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Title: Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations

Abstract

Understanding the growth pathway of faceted alloy nanoparticles at the atomic level is crucial to morphology control and property tuning. Yet, it remains a challenge due to complexity of the growth process and technical limits of modern characterization tools. We report a combinational use of multiple cutting-edge in situ techniques to study the growth process of octahedral Pt3Ni nanoparticles, which reveal the particle growth and facet formation mechanisms. Our studies confirm the formation of octahedral Pt3Ni initiates from Pt nuclei generation, which is followed by continuous Pt reduction that simultaneously catalyzes Ni reduction, resulting in mixed alloy formation with moderate elemental segregation. Furthermore, carbon monoxide molecules serve as a facet formation modulator and induce Ni segregation to the surface, which inhibits the (111) facet growth and causes the particle shape to evolve from a spherical cluster to an octahedron as the (001) facet continues to grow.

Authors:
 [1];  [1];  [2];  [2]; ORCiD logo [3];  [4];  [1];  [1];  [2];  [4];  [4];  [3];  [5];  [1]
  1. The Univ. of Akron, Akron, OH (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, Irvine, CA (United States)
  3. Purdue Univ., West Lafayette, IN (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Univ. of California, Irvine, CA (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1482566
Report Number(s):
BNL-209465-2018-JAAM
Journal ID: ISSN 2041-1723
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Shen, Xiaochen, Zhang, Changlin, Zhang, Shuyi, Dai, Sheng, Zhang, Guanghui, Ge, Mingyuan, Pan, Yanbo, Sharkey, Stephen M., Graham, George W., Hunt, Adrian, Waluyo, Iradwikanari, Miller, Jeffrey T., Pan, Xiaoqing, and Peng, Zhenmeng. Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations. United States: N. p., 2018. Web. doi:10.1038/s41467-018-06900-z.
Shen, Xiaochen, Zhang, Changlin, Zhang, Shuyi, Dai, Sheng, Zhang, Guanghui, Ge, Mingyuan, Pan, Yanbo, Sharkey, Stephen M., Graham, George W., Hunt, Adrian, Waluyo, Iradwikanari, Miller, Jeffrey T., Pan, Xiaoqing, & Peng, Zhenmeng. Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations. United States. https://doi.org/10.1038/s41467-018-06900-z
Shen, Xiaochen, Zhang, Changlin, Zhang, Shuyi, Dai, Sheng, Zhang, Guanghui, Ge, Mingyuan, Pan, Yanbo, Sharkey, Stephen M., Graham, George W., Hunt, Adrian, Waluyo, Iradwikanari, Miller, Jeffrey T., Pan, Xiaoqing, and Peng, Zhenmeng. Fri . "Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations". United States. https://doi.org/10.1038/s41467-018-06900-z. https://www.osti.gov/servlets/purl/1482566.
@article{osti_1482566,
title = {Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations},
author = {Shen, Xiaochen and Zhang, Changlin and Zhang, Shuyi and Dai, Sheng and Zhang, Guanghui and Ge, Mingyuan and Pan, Yanbo and Sharkey, Stephen M. and Graham, George W. and Hunt, Adrian and Waluyo, Iradwikanari and Miller, Jeffrey T. and Pan, Xiaoqing and Peng, Zhenmeng},
abstractNote = {Understanding the growth pathway of faceted alloy nanoparticles at the atomic level is crucial to morphology control and property tuning. Yet, it remains a challenge due to complexity of the growth process and technical limits of modern characterization tools. We report a combinational use of multiple cutting-edge in situ techniques to study the growth process of octahedral Pt3Ni nanoparticles, which reveal the particle growth and facet formation mechanisms. Our studies confirm the formation of octahedral Pt3Ni initiates from Pt nuclei generation, which is followed by continuous Pt reduction that simultaneously catalyzes Ni reduction, resulting in mixed alloy formation with moderate elemental segregation. Furthermore, carbon monoxide molecules serve as a facet formation modulator and induce Ni segregation to the surface, which inhibits the (111) facet growth and causes the particle shape to evolve from a spherical cluster to an octahedron as the (001) facet continues to grow.},
doi = {10.1038/s41467-018-06900-z},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Fri Oct 26 00:00:00 EDT 2018},
month = {Fri Oct 26 00:00:00 EDT 2018}
}

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