Journal
JOURNAL OF CATALYSIS
Volume 365, Issue -, Pages 303-312Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2018.07.004
Keywords
Single-site catalyst; Pt catalyst; Metal-ligand self-assembly; Oxide support; X-ray Absorption Spectroscopy; Hydrosilylation catalysis
Categories
Funding
- U. S. Department of Energy (DOE), Office of Basic Energy Sciences, Chemical Sciences program [DE-SC0016367]
- DOE Office of Science [DE-AC02-06CH11357]
- U.S. Department of Energy (DOE) [DE-SC0016367] Funding Source: U.S. Department of Energy (DOE)
Ask authors/readers for more resources
Developing single-site metal catalysts has been regarded as a promising strategy to improve activity and selectivity in heterogeneous catalysis. Here, we report a metal-ligand self-assembly method to create Pt single-site centers on powdered oxide supports. Impregnating Pt and a ligand 3,6-di-2-pyridyl-1,2,4,5-tetrazine (DPTZ) simultaneously (one-step) creates Pt-DPTZ single-sites on powdered MgO, Al2O3, and CeO2. MgO has the most uniform single-sites due to a strong, non-competitive support-ligand interaction, and a support-metal interaction of appropriate strength. Pt(II) centers are stabilized between the N binding pockets of DPTZ, with minimal metallic nanoparticle formation. This system was characterized by XAS, XPS, TEM, XRD, and CO adsorption. Sequential impregnation of Pt and DPTZ (two-step) was also tested on Al2O3 and CeO2, but is not as effective as the one-step method due to limited Pt accessibility and mobility. These oxide-supported Pt-DPTZ single-sites were found to be effective catalysts in hydrosilylation reactions. This work demonstrates a metal-ligand self-assembly strategy to create metal single site centers on high surface area catalyst supports. (C) 2018 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available