Using the Interaction between Copper and Manganese to Stabilize Copper Single-atom for CO Oxidation
Mingzhu Jiang1,2, Jing Chen3,2, Yanxia Gao1,2
1CAS Center for Excellence in Regional Atmospheric Environment, and Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 13, 2021
Summary
Researchers developed a novel method using copper-manganese interaction to stabilize single copper atoms on manganese dioxide. This catalyst significantly enhances carbon monoxide oxidation activity and oxygen storage capacity.
Area of Science:
- Materials Science
- Catalysis
- Surface Chemistry
Background:
- Single-atom catalysts offer high efficiency but suffer from aggregation.
- Manganese dioxide (MnO2) is a promising catalyst support.
- Controlling single-atom dispersion is crucial for catalytic performance.
Purpose of the Study:
- To develop a method for immobilizing copper (Cu) single atoms on MnO2.
- To investigate the Cu-Mn interaction's effect on catalyst properties.
- To enhance carbon monoxide (CO) oxidation activity and oxygen storage capacity (OSC).
Main Methods:
- Redox-driven hydrolysis for Cu single-atom immobilization on MnO2.
- Comprehensive structure and property characterizations.
- Testing CO oxidation activity and OSC.
Main Results:
- Cu-Mn interaction effectively prevents Cu single-atom aggregation.
- Formation of Cu-O-Mn entity enhances CO catalytic activity.
- 3%-Cu1/MnO2 exhibits a 12-fold increase in OSC and high CO conversion (95% at 80°C) over 15 cycles.
Conclusions:
- A reliable method for synthesizing Cu single-atom catalysts on MnO2 was established.
- The Cu-Mn interaction significantly improves CO oxidation and OSC.
- This study deepens the understanding of single transition metal atom-support interactions for catalysis.
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