Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 269, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118769
Keywords
Covalent triazine frameworks; Heterogeneous catalysis; Synergistic effect; Oxygen activation; Mechanistic studies
Funding
- Ghent University BOF doctoral [01D04318]
- Research Foundation Flanders (FWOVlaanderen) [G000117N]
- FWO-Vlaanderen [12Q7718N]
- Ghent University
- Ministry of Science and Technology, China [2016YFE01069800]
- National Natural Science Foundation of China [21403025]
- Fund for Scientific Research - Flanders (FWO)
- Research Board of Ghent University (BOF)
- NWO
- FWO
- Research Board of Ghent University [GOA010-17, BOF GOA2017000303]
- Research Foundation: Flanders (FWO)
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Synergistic catalysis holds great promise to enhance the catalytic performance of heterogeneous catalysts suffering from sluggish reaction kinetics. Much effort has been dedicated to the development of bimetallic systems in which the two promoter elements display synergistic benefits compared to monometallic counterparts. However, the use of bimetallic catalysts inescapably raises the cost of preparation and environmental issues. This study discovers a synergistic effect when using a bipyridine covalent triazine framework (bipy-CTF) as support for an Ir-III complex in the aerobic oxidation reaction. The detailed mechanistic study provides insights into the function of the bipy-CTF in this synergistic catalysis. The EPR and in-situ XANES analyses confirm the applicability of bipy-CTF to activate oxygen and alcohol, resulting in an enhancement of the performance of the Ir-III complex to exceed the activity of the homogeneous counterpart. This is an unprecedented report on promoting the activity of a heterogeneous catalyst through its solid support.
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