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Updated: Sep 25, 2025

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
Published on: January 17, 2020
Hierarchical Regulation of LaMnO3 Dual-Pathway Strategy for Excellent Room-Temperature Organocatalytic Oxidation
Weiran Zhu1, Nan Hao1, Chen Chen1
1Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
This study introduces a dual-pathway strategy for perovskite catalysts, enhancing catalytic oxidation performance. This novel approach achieves a steplike improvement, overcoming single-pathway limitations for efficient chemical oxygen demand detection.
Area of Science:
- Materials Science
- Catalysis
- Environmental Chemistry
Background:
- Single-pathway strategies for perovskite catalysts have limitations in performance enhancement.
- Hierarchical regulation offers a potential route to overcome these limitations.
Purpose of the Study:
- To propose and investigate a dual-pathway strategy for enhancing perovskite catalytic oxidation performance.
- To develop a novel catalyst for efficient colorimetric chemical oxygen demand detection.
Main Methods:
- A-site Ce substitution in LaMnO3 perovskite.
- Nitric acid selective dissolution for in situ surface reconstruction.
- Characterization of material properties including oxygen mobility, Mn oxidation states, and surface area.
Main Results:
- The dual-pathway strategy resulted in a steplike improvement in catalytic oxidation performance.
- In situ reconstitution formed a Mn-rich surface with enhanced oxygen mobility and a high Mn4+/Mn3+ molar ratio.
- The synthesized sdLa0.7Ce0.3MnO3 exhibited excellent catalytic oxidation of organics and enabled room-temperature colorimetric chemical oxygen demand detection.
Conclusions:
- Ce substitution enhances oxidation capacity by improving oxygen mobility and Mn4+/Mn3+ ratio.
- Nitric acid treatment accelerates Mn reconstruction and increases specific surface area.
- The developed dual-pathway strategy offers a superior approach for catalyst design and environmental sensing applications.
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