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


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.

SUBMITTER: Feng S 

PROVIDER: S-EPMC6872874 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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

Feng Siquan S   Song Xiangen X   Liu Yang Y   Lin Xiangsong X   Yan Li L   Liu Siyue S   Dong Wenrui W   Yang Xueming X   Jiang Zheng Z   Ding Yunjie Y  

Nature communications 20191121 1


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 CH<sub>3</sub>I and CO mixture. The dispersive process of the Rh nanoparticle is investigated in depth as an exa  ...[more]

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