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Updated: Feb 4, 2026
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A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
Published on: February 5, 2016
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Unique size-dependent nanocatalysis revealed at the single atomically precise gold cluster level
Yuwei Zhang1,2, Ping Song1,2, Tiankai Chen3
1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
Summary
This study reveals how gold cluster size dictates catalytic activity and reaction mechanisms. Smaller gold clusters exhibit distinct catalytic behaviors compared to larger clusters and nanoparticles.
Area of Science:
- Nanomaterials Science
- Catalysis
- Physical Chemistry
Background:
- Atomically precise metal clusters offer unique size-dependent properties.
- The impact of cluster size on catalytic behavior at the single-cluster level remains largely unexplored.
Purpose of the Study:
- To investigate the size-dependent catalytic behaviors of individual gold (Au) clusters.
- To elucidate the underlying mechanisms of catalysis and product dissociation in relation to cluster size.
Main Methods:
- Real-time monitoring of catalytic processes using single-molecule fluorescence microscopy.
- Single-turnover resolution analysis of individual Au cluster catalysis.
- Density Functional Theory (DFT) calculations to support experimental findings.
Main Results:
- Observed a strong size effect on both catalytic product formation and dissociation for individual Au clusters.
- Demonstrated that small Au clusters (e.g., Au15(MPA)13) utilize a competitive Langmuir-Hinshelwood mechanism.
- Showed that larger Au clusters (e.g., Au18(MPA)14, Au25(MPA)18) and nanoparticles employ a noncompetitive Langmuir-Hinshelwood mechanism for the same reaction.
Conclusions:
- The observed size effects in nanocatalysis are intrinsically linked to the size-dependent electronic structure of Au clusters.
- Distinct catalytic properties arise from differences in size-dependent structures between Au clusters and traditional Au nanoparticles.
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