She, Wei and Qi, Tianqinji and Cui, Meng Xing and Yan, Peng Fei and Ng, Seik Weng and Li, Wei Zuo and Li, Guang Ming (2018) High Catalytic Performance of a CeO2-Supported Ni Catalyst for Hydrogenation of Nitroarenes, Fabricated via Coordination-Assisted Strategy. ACS Applied Materials & Interfaces, 10 (17). pp. 14698-14707. ISSN 1944-8244, DOI https://doi.org/10.1021/acsami.8b01187.
Full text not available from this repository.Abstract
A family of two-dimensional salen-type lanthanide complexes was synthesized through a facile solution diffusion method. The two-dimensional lanthanide complexes were characterized by single-crystal X-ray diffraction (SCXRD) and X-ray photoelectron spectroscopy (XPS) analytical techniques. The SCXRD and XPS analyses reveal that the obtained two-dimensional structures are rich in uncoordinated imine (-CH=N-) groups located on the skeleton of the salen-type organic ligand, which retain strong coordination ability with metal ions. On the basis of this unique feature, a highly dispersed CeO2-supported Ni catalyst (Ni/CeO2-CAS) with highly strong metal-support interaction was first synthesized via a coordination-assisted synthesis (CAS) method, which exhibits a much better catalytic activity in the hydrogenation of nitrobenzene than the traditional Ni/CeO2-IWI catalyst prepared by incipient wetness impregnation (IWI). The origin of the improved catalytic activity of Ni/CeO2-CAS as well as the role of Ni@Ce-H2salen was revealed by using diverse characterizations. On the basis of the comparative characterization results, the superior catalytic performance of Ni/CeO2-CAS to Ni/CeO2-IWI could have resulted from the smaller and highly dispersed Ni nanoparticulates, the intensified Ni-CeO2 interaction, the enhanced NiO reducibility, and the higher concentration of oxygen vacancies, favoring the H2 dissociation and adsorption of the nitrobenzene reactant. The Ni/CeO2-CAS catalyst also exhibits high catalytic performance for reduction of diverse nitroarenes to their corresponding functionalized arylamines. We anticipated that this coordination-assisted strategy may provide a new way for preparing other highly oxide-supported catalysts with potential applications in various catalytic reactions.
| Item Type: | Article |
|---|---|
| Funders: | National Natural Science Foundation of China (no. 21471051), Doctoral Fund of Ministry of Education of China (2017M621315), Heilong-jiang Provincial Government Postdoctoral Science Foundation (LBH-Z17190), State Key Laboratory of Fine Chemicals (KF1714) |
| Uncontrolled Keywords: | hydrogenation of nitrobenzene; oxygen vacancies; strong metal−support interaction; two-dimensional lanthanide complexes; uncoordinated groups |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Faculty of Science |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 13 Mar 2019 03:40 |
| Last Modified: | 13 Mar 2019 03:40 |
| URI: | http://eprints.um.edu.my/id/eprint/20684 |
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