Direct observation of the formation and stabilization of metallic nanoparticles on carbon supports

Zhennan Huang, Yonggang Yao, Zhenqian Pang, Yifei Yuan, Tangyuan Li, Kun He, Xiaobing Hu, Jian Cheng, Wentao Yao, Yuzi Liu, Anmin Nie, Soroosh Sharifi-Asl, Meng Cheng, Boao Song, Khalil Amine, Jun Lu, Teng Li (), Liangbing Hu () and Reza Shahbazian-Yassar ()
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Zhennan Huang: University of Illinois at Chicago
Yonggang Yao: University of Maryland
Zhenqian Pang: University of Maryland
Yifei Yuan: University of Illinois at Chicago
Tangyuan Li: University of Maryland
Kun He: Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University
Xiaobing Hu: Northwestern University Atomic and Nanoscale Characterization Experimental (NUANCE) Center, Northwestern University
Jian Cheng: University of Maryland
Wentao Yao: Michigan Technological University
Yuzi Liu: Argonne National Laboratory
Anmin Nie: Center for High Pressure Science, State Key Lab of Metastable Materials Science and Technology, Yanshan University
Soroosh Sharifi-Asl: University of Illinois at Chicago
Meng Cheng: University of Illinois at Chicago
Boao Song: University of Illinois at Chicago
Khalil Amine: Chemical Sciences and Engineering Division, Argonne National Laboratory
Jun Lu: Chemical Sciences and Engineering Division, Argonne National Laboratory
Teng Li: University of Maryland
Liangbing Hu: University of Maryland
Reza Shahbazian-Yassar: University of Illinois at Chicago

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Direct formation of ultra-small nanoparticles on carbon supports by rapid high temperature synthesis method offers new opportunities for scalable nanomanufacturing and the synthesis of stable multi-elemental nanoparticles. However, the underlying mechanisms affecting the dispersion and stability of nanoparticles on the supports during high temperature processing remain enigmatic. In this work, we report the observation of metallic nanoparticles formation and stabilization on carbon supports through in situ Joule heating method. We find that the formation of metallic nanoparticles is associated with the simultaneous phase transition of amorphous carbon to a highly defective turbostratic graphite (T-graphite). Molecular dynamic (MD) simulations suggest that the defective T-graphite provide numerous nucleation sites for the nanoparticles to form. Furthermore, the nanoparticles partially intercalate and take root on edge planes, leading to high binding energy on support. This interaction between nanoparticles and T-graphite substrate strengthens the anchoring and provides excellent thermal stability to the nanoparticles. These findings provide mechanistic understanding of rapid high temperature synthesis of metal nanoparticles on carbon supports and the origin of their stability.

Date: 2020
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DOI: 10.1038/s41467-020-20084-5

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