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Published on: August 17, 2019
Toluene oxidation with triple-module cooperativity in an atomically precise Cu4Pt2(C≡CCyOH)8 catalyst
Shisi Tang1, Chenyang Shen1, Qingxi Zhai1
1State Key Laboratory of Coordination Chemistry, Key Laboratory of Mesoscopic Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
Researchers developed a novel copper-platinum cluster catalyst for selective toluene oxidation to benzaldehyde. This electrocatalyst also demonstrates high efficiency in hydrogen production, offering a molecular approach for inert molecule reactions.
Area of Science:
- Catalysis
- Materials Science
- Electrochemistry
Background:
- Breaking and forming C(sp3)-H bonds in hydrocarbons is a significant challenge in catalysis.
- Developing efficient catalysts for selective oxidation of inert molecules like toluene is crucial.
Purpose of the Study:
- To report a novel atomically precise copper-platinum cluster as an electrocatalyst for toluene oxidation.
- To investigate the catalytic mechanism and efficiency of the cluster for benzaldehyde production.
- To evaluate the catalyst's performance in the hydrogen evolution reaction.
Main Methods:
- Electrocatalytic oxidation of toluene using a Cu4Pt2(C≡CCyOH)8 cluster.
- In situ spectroscopic analysis to elucidate reaction mechanisms.
- Electrocatalytic hydrogen evolution reaction measurements.
Main Results:
- The Cu4Pt2 cluster selectively produced benzaldehyde from toluene with >99% Faradaic efficiency.
- A multi-step mechanism involving water activation, hydrogen abstraction, and radical coupling was identified.
- The cluster exhibited superior activity for hydrogen production compared to commercial Pt/C catalysts.
Conclusions:
- Atomically precise cluster design enables highly selective and efficient catalysis for inert molecule transformations.
- The developed catalyst offers a dual function for oxidation and hydrogen evolution.
- This work presents a molecular strategy for designing advanced catalytic systems.
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