Highly Efficient Iron-Based Catalyst for Light-Driven Selective Hydrogenation of Nitroarenes.
Jun Ma1,2, Xin Mao3, Canyu Hu1
1Hefei National Research Center for Physical Sciences at the Microscale, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, and National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
This study introduces an efficient Fe3O4@TiO2 photocatalyst for converting nitro compounds to amines using light. This nonprecious catalyst demonstrates high selectivity and photothermal hydrogenation performance.
Area of Science:
- Materials Science
- Catalysis
- Photochemistry
Background:
- Light-driven hydrogenation of nitro compounds to amines is crucial but challenging.
- Development of efficient, nonprecious photocatalysts is needed for practical applications.
Purpose of the Study:
- To develop a high-performance Fe3O4@TiO2 photocatalyst for nitro compound hydrogenation.
- To investigate the catalytic mechanism and understand the role of metal-support interactions.
Main Methods:
- Sol-gel and pyrolysis synthesis of Fe3O4@TiO2 photocatalyst.
- Photothermal hydrogenation reactions of various nitro compounds.
- Experimental characterization and theoretical calculations.
Main Results:
- Fe3O4@TiO2 exhibited high efficiency and selectivity (>90%) for hydrogenation.
- Fe3O4 was identified as the major active phase, enhanced by strong metal-support interaction with TiO2.
- Successful conversion of diverse nitro compounds and pharmaceutical intermediates, even at gram scale.
Conclusions:
- The Fe3O4@TiO2 photocatalyst offers excellent photothermal hydrogenation performance.
- Strong metal-support interaction enhances catalytic activity via improved photothermal effect and reactant adsorption.
- This work provides insights for designing novel nonprecious photo/thermo-catalysts.
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