In situ identification of the metallic state of Ag nanoclusters in oxidative dispersion

Rongtan Li, Xiaoyan Xu, Beien Zhu, Xiao-Yan Li, Yanxiao Ning, Rentao Mu, Pengfei Du, Mengwei Li, Huike Wang, Jiajie Liang, Yongsheng Chen, Yi Gao (), Bing Yang (), Qiang Fu () and Xinhe Bao ()
Additional contact information
Rongtan Li: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Xiaoyan Xu: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Beien Zhu: Shanghai Advanced Research Institute, The Chinese Academy of Sciences
Xiao-Yan Li: University of Chinese Academy of Sciences
Yanxiao Ning: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Rentao Mu: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Pengfei Du: University of Chinese Academy of Sciences
Mengwei Li: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Huike Wang: Nankai University
Jiajie Liang: Nankai University
Yongsheng Chen: Nankai University
Yi Gao: Shanghai Advanced Research Institute, The Chinese Academy of Sciences
Bing Yang: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Qiang Fu: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences
Xinhe Bao: Dalian Institute of Chemical Physics, The Chinese Academy of Sciences

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Oxidative dispersion has been widely used in regeneration of sintered metal catalysts and fabrication of single atom catalysts, which is attributed to an oxidation-induced dispersion mechanism. However, the interplay of gas-metal-support interaction in the dispersion processes, especially the gas-metal interaction has not been well illustrated. Here, we show dynamic dispersion of silver nanostructures on silicon nitride surface under reducing/oxidizing conditions and during carbon monoxide oxidation reaction. Utilizing environmental scanning (transmission) electron microscopy and near-ambient pressure photoelectron spectroscopy/photoemission electron microscopy, we unravel a new adsorption-induced dispersion mechanism in such a typical oxidative dispersion process. The strong gas-metal interaction achieved by chemisorption of oxygen on nearly-metallic silver nanoclusters is the internal driving force for dispersion. In situ observations show that the dispersed nearly-metallic silver nanoclusters are oxidized upon cooling in oxygen atmosphere, which could mislead to the understanding of oxidation-induced dispersion. We further understand the oxidative dispersion mechanism from the view of dynamic equilibrium taking temperature and gas pressure into account, which should be applied to many other metals such as gold, copper, palladium, etc. and other reaction conditions.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-021-21552-2 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21552-2

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-021-21552-2

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().