Reduction-Controlled Atomic Migration for Single Atom Alloy Library

Picturing the atomic migration pathways of catalysts in a reactive atmosphere is of central significance for uncovering the underlying catalytic mechanisms and directing the design of high-performance catalysts. Here, we describe a reduction-controlled atomic migration pathway that converts nanopart...

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Bibliographic Details
Published in:Nano letters 2022-05, Vol.22 (10), p.4232-4239
Main Authors: Wang, Yan-Ru, Zhuang, Qingfeng, Cao, Rui, Li, Yi, Gao, Fei-Yue, Li, Zhao-Rui, He, Zhen, Shi, Lei, Meng, Yu-Feng, Li, Xu, Wang, Jin-Long, Duan, Yu, Gao, Min-Rui, Zheng, Xiao, Yu, Shu-Hong
Format: Article
Language:English
Subjects:
Alloys
atom migration
Catalysis
cupper
MATERIALS SCIENCE
Metal Nanoparticles
noble metal
reduction-controlled
single atom alloys
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Summary:Picturing the atomic migration pathways of catalysts in a reactive atmosphere is of central significance for uncovering the underlying catalytic mechanisms and directing the design of high-performance catalysts. Here, we describe a reduction-controlled atomic migration pathway that converts nanoparticles to single atom alloys (SAAs), which has remained synthetically challenging in prior attempts due to the elusive mechanism. We achieved this by thermally treating the noble-metal nanoparticles M (M = Ru, Rh, Pd, Ag, Ir, Pt, and Au) on metal oxide (CuO) supports with H2/Ar. Atomic-level characterization revealed such conversion as the synergistic consequence of noble metal-promoted H2 dissociation and concomitant CuO reduction. The observed atomic migration pathway offers an understanding of the dynamic mechanisms study of nanomaterials formation and catalyst design.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.2c01314