In situ formation of mononuclear complexes by reaction-induced atomic dispersion of supported noble metal nanoparticles

Siquan Feng, Xiangen Song (), Yang Liu, Xiangsong Lin (), Li Yan, Siyue Liu, Wenrui Dong, Xueming Yang, Zheng Jiang () and Yunjie Ding ()
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Siquan Feng: Chinese Academy of Sciences
Xiangen Song: Chinese Academy of Sciences
Yang Liu: University of Chinese Academy of Sciences
Xiangsong Lin: Jiaxing University
Li Yan: Chinese Academy of Sciences
Siyue Liu: Chinese Academy of Sciences
Wenrui Dong: Chinese Academy of Sciences
Xueming Yang: Chinese Academy of Sciences
Zheng Jiang: Chinese Academy of Sciences
Yunjie Ding: Chinese Academy of Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Supported noble metal nanoclusters and single-metal-site catalysts are inclined to aggregate into particles, driven by the high surface-to-volume ratio. Herein, we report a general method to atomically disperse noble metal nanoparticles. The activated carbon supported nanoparticles of Ru, Rh, Pd, Ag, Ir and Pt metals with loading up to 5 wt. % are completely dispersed by reacting with CH3I and CO mixture. The dispersive process of the Rh nanoparticle is investigated in depth as an example. The in-situ detected I• radicals and CO molecules are identified to promote the breakage of Rh-Rh bonds and the formation of mononuclear complexes. The isolated Rh mononuclear complexes are immobilized by the oxygen-containing functional groups based on the effective atomic number rule. The method also provides a general strategy for the development of single-metal-site catalysts for other applications.

Date: 2019
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DOI: 10.1038/s41467-019-12965-1

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