Synthesis of high-entropy alloy nanoparticles on supports by the fast moving bed pyrolysis

Shaojie Gao, Shaoyun Hao, Zhennan Huang, Yifei Yuan, Song Han, Lecheng Lei, Xingwang Zhang (), Reza Shahbazian-Yassar and Jun Lu ()
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Shaojie Gao: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University
Shaoyun Hao: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University
Zhennan Huang: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago
Yifei Yuan: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago
Song Han: School of Environment and Safety Engineering, Jiangsu University
Lecheng Lei: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University
Xingwang Zhang: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University
Reza Shahbazian-Yassar: Department of Mechanical and Industrial Engineering, University of Illinois at Chicago
Jun Lu: Chemical Sciences and Engineering Division, Argonne National Laboratory

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

Abstract: Abstract High-entropy alloy nanoparticles (HEA-NPs) are important class of materials with significant technological potential. However, the strategies for synthesizing uniformly dispersed HEA-NPs on granular supports such as carbon materials, γ-Al2O3, and zeolite, which is vital to their practical applications, are largely unexplored. Herein, we present a fast moving bed pyrolysis strategy to immobilize HEA-NPs on granular supports with a narrow size distribution of 2 nm up to denary (MnCoNiCuRhPdSnIrPtAu) HEA-NPs at 923 K. Fast moving bed pyrolysis strategy ensures the mixed metal precursors rapidly and simultaneously pyrolyzed at high temperatures, resulting in nuclei with a small size. The representative quinary (FeCoPdIrPt) HEA-NPs exhibit high stability (150 h) toward hydrogen evolution reaction with high mass activity, which is 26 times higher than the commercial Pt/C at an overpotential of 100 mV. Our strategy provides an improved methodology for synthesizing HEA-NPs on various supports.

Date: 2020
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DOI: 10.1038/s41467-020-15934-1

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