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Updated: Feb 25, 2026

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Structural Isomerization of Au28 Nanoclusters Induces Catalytic Difference in CO2 Electroreduction
Siqi Li1, Xia Zhou2, Xintong Guo3
1School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Chemical Theory and Mechanism, Chongqing University, Chongqing 401331, China.
Structural differences in gold nanoclusters (Au NCs) significantly impact CO2 reduction. This study shows one Au28 isomer (Au28i) outperforms another (Au28ii) in electrocatalytic CO2RR, achieving ~90% CO selectivity.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Atomically precise gold nanoclusters (Au NCs) are promising electrocatalysts for CO2 reduction reaction (CO2RR).
- The effect of structural isomerism on Au NCs' CO2RR performance remains underexplored.
- Understanding isomer-specific properties is crucial for designing efficient CO2RR catalysts.
Purpose of the Study:
- To systematically investigate the electrocatalytic differences between two structural isomers of Au28(CHT)20 (Au28i and Au28ii) for CO2RR.
- To elucidate the structure-activity relationship in Au NCs based on isomerism.
- To provide guidance for rational design of advanced CO2RR electrocatalysts.
Main Methods:
- Theoretical simulations (DFT) to analyze electronic structures and reaction mechanisms.
- Experimental electrochemical measurements of CO2RR performance.
- Characterization of Au NC isomers and their catalytic activity.
Main Results:
- Au28i isomer shows more facile ligand desorption and higher CO2RR activity compared to Au28ii.
- Theoretical simulations indicate Au28i has a higher d-band center and less ordered water interface, enhancing catalysis.
- Experimentally, Au28i achieved ~90% Faradaic efficiency for CO (FE_CO) and superior stability over Au28ii.
Conclusions:
- Isomerism in Au NCs leads to distinct electrocatalytic performance in CO2RR.
- Precise structural control of Au NCs is vital for optimizing CO2RR efficiency and selectivity.
- This work offers critical insights for designing tailored metal nanocluster catalysts.
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