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Title: Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale

Abstract

Intermetallic nanoparticles (iNPs) have yielded enormous successes in catalytic applications by the formation of ordered phases. However, atomic-level understanding of the alloying mechanism, which plays a pivotal role in controlling intermetallic phases and tailoring their catalytic properties, is still elusive. In this study, we discovered a consecutive formation of ordered Pt3Sn and PtSn phases during the growth of Pt-Sn iNP inside a well-defined nano-reactor at elevated temperature by using in situ scanning transmission electron microscopy. We found that the surface-mediated diffusion of Sn controls overall dynamics of the reaction, while the unique coherent interfacial structure is determinative for the PtSn transformation. We then further controlled the phase selection of Pt-Sn iNPs and demonstrated their distinguishable catalytic behaviors. Lastly, our findings not only provide detailed experimental evidence on the alloying mechanism in intermetallic nanoscale systems but also pave the way for mechanistic control of synthesis and catalytic properties of iNPs.

Authors:
; ; ; ; ; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1617960
Alternate Identifier(s):
OSTI ID: 1515000; OSTI ID: 1547586
Report Number(s):
IS-J-9881
Journal ID: ISSN 2451-9294; S245192941930083X; PII: S245192941930083X
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Published Article
Journal Name:
Chem
Additional Journal Information:
Journal Name: Chem Journal Volume: 5 Journal Issue: 5; Journal ID: ISSN 2451-9294
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; intermetallic nanoparticles; in situ transmission electron microscopy; phase transformation; catalysis; acetylene hydrogenation; PtSn; Pt3Sn

Citation Formats

Ma, Tao, Wang, Shuai, Chen, Minda, Maligal-Ganesh, Raghu V., Wang, Lin-Lin, Johnson, Duane D., Kramer, Matthew J., Huang, Wenyu, and Zhou, Lin. Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale. United States: N. p., 2019. Web. doi:10.1016/j.chempr.2019.02.026.
Ma, Tao, Wang, Shuai, Chen, Minda, Maligal-Ganesh, Raghu V., Wang, Lin-Lin, Johnson, Duane D., Kramer, Matthew J., Huang, Wenyu, & Zhou, Lin. Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale. United States. https://doi.org/10.1016/j.chempr.2019.02.026
Ma, Tao, Wang, Shuai, Chen, Minda, Maligal-Ganesh, Raghu V., Wang, Lin-Lin, Johnson, Duane D., Kramer, Matthew J., Huang, Wenyu, and Zhou, Lin. Wed . "Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale". United States. https://doi.org/10.1016/j.chempr.2019.02.026.
@article{osti_1617960,
title = {Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale},
author = {Ma, Tao and Wang, Shuai and Chen, Minda and Maligal-Ganesh, Raghu V. and Wang, Lin-Lin and Johnson, Duane D. and Kramer, Matthew J. and Huang, Wenyu and Zhou, Lin},
abstractNote = {Intermetallic nanoparticles (iNPs) have yielded enormous successes in catalytic applications by the formation of ordered phases. However, atomic-level understanding of the alloying mechanism, which plays a pivotal role in controlling intermetallic phases and tailoring their catalytic properties, is still elusive. In this study, we discovered a consecutive formation of ordered Pt3Sn and PtSn phases during the growth of Pt-Sn iNP inside a well-defined nano-reactor at elevated temperature by using in situ scanning transmission electron microscopy. We found that the surface-mediated diffusion of Sn controls overall dynamics of the reaction, while the unique coherent interfacial structure is determinative for the PtSn transformation. We then further controlled the phase selection of Pt-Sn iNPs and demonstrated their distinguishable catalytic behaviors. Lastly, our findings not only provide detailed experimental evidence on the alloying mechanism in intermetallic nanoscale systems but also pave the way for mechanistic control of synthesis and catalytic properties of iNPs.},
doi = {10.1016/j.chempr.2019.02.026},
journal = {Chem},
number = 5,
volume = 5,
place = {United States},
year = {Wed May 01 00:00:00 EDT 2019},
month = {Wed May 01 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.chempr.2019.02.026

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Cited by: 27 works
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Works referencing / citing this record:

Sub‐3 nm Intermetallic Ordered Pt 3 In Clusters for Oxygen Reduction Reaction
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