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Research Article

Single-element amorphous palladium nanoparticles formed via phase separation

Dong Sheng He1,§, Yi Huang1,§, Benjamin D. Myers2, Dieter Isheim2, Xinyu Fan1, Guang-Jie Xia3, Yunsheng Deng1, Lin Xie1, Shaobo Han4, Yang Qiu1, Yang-Gang Wang3, Junhua Luan5, Zengbao Jiao6, Li Huang1, Vinayak P. Dravid2, Jiaqing He1( )
Pico Center and Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China

§ Dong Sheng He and Yi Huang contributed equally to this work.

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Graphical Abstract

Phase separation and undercooling in the formation of single-element amorphous palladiumnanoparticles were observed by in-situ transmission electron microscopy.

Abstract

Physically vitrifying amorphous single-element metal requires ultrahigh cooling rates, which are still unachievable for most of the closest-packed metals. Here, we report a facile chemical synthetic strategy for single-element amorphous palladium nanoparticles with a purity of 99.35 at.% ± 0.23 at.% from palladium–silicon liquid droplets. In-situ transmission electron microscopy directly detected the solidification of palladium and the separation of silicon. Further hydrogen absorption experiment showed that the amorphous palladium expanded little upon hydrogen uptake, exhibiting a great potential application for hydrogen separation. Our results provide insight into the formation of amorphous metal at nanoscale.

Keywords

Pdsingle-elementmetallic glassnanoparticlephase separationundercooling

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Nano Research
Volume 15 Issue 6,
June 2022
Pages 5575-5580
DOI: 10.1007/s12274-022-4173-1
Cite this article:
He DS, Huang Y, Myers BD, et al. Single-element amorphous palladium nanoparticles formed via phase separation. Nano Research, 2022, 15(6): 5575-5580. https://doi.org/10.1007/s12274-022-4173-1
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Received: 20 December 2021
Revised: 15 January 2022
Accepted: 17 January 2022
Published: 21 March 2022
© Tsinghua University Press 2022
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