Published August 2014
| Supplemental Material
Journal Article
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Iridium Complexes and Clusters in Dealuminated Zeolite HY: Distribution between Crystalline and Impurity Amorphous Regions
Abstract
Dealuminated zeolite HY was used to support Ir(CO)_2 complexes formed from Ir(CO)_2(C_5H_7O_2). Infrared and X-ray absorption spectra and atomic resolution electron microscopy images identify these complexes, and the images and ^(27)Al NMR spectra identify impurity amorphous regions in the zeolite where the iridium is more susceptible to aggregation than in the crystalline regions. The results indicate the value of electron microscopy in characterizing the amorphous impurity regions of zeolites and a significant stability limitation of metals in these regions of zeolite catalyst supports.
Additional Information
© 2014 American Chemical Society. Received: May 9, 2014. Revised: June 29, 2014. Publication Date (Web): July 8, 2014. This work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Grants DEFG02-04ER15513 (C.M.M.) and DE-FG02-03ER46057 (P.X.) through the University of California, Davis; the Laboratory Directed Research and Development Program: Chemical Imaging Initiative, at Pacific Northwest National Laboratory (PNNL); and the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the DOE's Office of Biological and Environmental Research and located at PNNL, a multiprogram national laboratory operated by Battelle for DOE under Contract DE-AC05-76RL01830. C.M.M. was supported in part by the UC MEXUS-CONACYT doctoral fellowship program. Use of the Advanced Photon Source, an Office of Science User Facility operated for DOE by Argonne National Laboratory, was supported by Contract No. DEAC02-06CH11357. We thank the beamline staff of the MRCAT. The NMR facility at Caltech was supported by the National Science Foundation (NSF) Grant 9724240 and supported in part by the NSF MRSEC Program Award DMR-520565.Attached Files
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Additional details
- Eprint ID
- 49285
- Resolver ID
- CaltechAUTHORS:20140905-110448206
- DEFG02-04ER15513
- Department of Energy (DOE)
- DE-FG02-03ER46057
- Department of Energy (DOE)
- University of California, Davis
- Pacific Northwest National Laboratory
- DE-AC05-76RL01830
- Department of Energy (DOE)
- UC MEXUS-CONACYT doctoral fellowship program
- DE-AC02-06CH11357
- Department of Energy (DOE)
- DMR-9724240
- NSF
- DMR-520565
- NSF
- Created
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2014-09-05Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field