期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 38, 页码 32180-32191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b10711
关键词
alpha-FeOOH; amorphous; hierarchical supraparticles; heterogeneous catalysis; hydrogen transfer reaction
资金
- National Natural Science Foundation of China [81872835, 21621003]
- Ministry of Science and Technology [2017YFC0906902, 2017ZX09301032]
- Macau Science and Technology Development Fund [129/2017/A3]
Fabrication of anilines from the corresponding nitroaromatics is a hot topic both for academia and for industry; however, conducting this protocol in water over a noble-metal-free catalytic system is still a great challenge. Continuous efforts are being made on exploiting novel catalysts for this transformation. In this work, we developed a scalable method for synthesizing the uniform flowerlike amorphous alpha-FeOOH hierarchical supraparticles. The well-defined amorphous alpha-FeOOH was prepared through an environmentally benign method, which is hydrolysis of the self-assembled iron glycolate at room temperature. Compared with other iron-only catalysts, this flowerlike amorphous alpha-FeOOH hierarchical supraparticle catalyst exhibits the best performance in the catalytic reduction of nitroaromatics to corresponding anilines by using water as the reaction solvent (turn over frequency is 106 h(-1) for 4-nitrophenol in water). The further results indicated that the amorphous structure, special nanostructures, and adsorption-desorption synergy offered excellent activity. The kinetics study shows that the reduction of 4-nitrophenol is first order for alpha-FeOOH, and the apparent active energy E-a is 75.9 kJ mol(-1). Furthermore, this catalyst can be used for eight times without obvious catalytic activity loss. We believe that this novel flowerlike amorphous alpha-FeOOH hierarchical supraparticle catalyst is a milestone in the reduction of nitro compounds.
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