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Iridium Nanocrystal Synthesis and Surface Coating-Dependent Catalytic Activity
Abstract
Iridium (Ir) nanocrystals were synthesized by reducing (methylcyclopentadienyl)(1,5-cyclooctadiene)lr with hexadecanediol in the presence of four different capping ligand combinations: oleic acid and oleylamine, trioctylphosphine (TOP), tetraoctylammonium bromide (TOAB), and tetraoctylphosphonium bromide (TOPB). The oleic acid/oleylamine-capped nanocrystals were of the highest quality, with the narrowest size and shape distribution. The Ir nanocrystals were tested for their ability to catalyze the hydrogenation of 1-decene as a model reaction. The oleic acid/oleylamine and TOP-capped nanocrystals were both catalytically dead. TOAB and TOPB-coated nanocrystals both catalyzed 1-decene hydrogenation, with the TOPB-coated nanocrystals exhibiting the highest turnover frequencies. Recycling through several catalytic reactions increased the catalytic activity, presumably as a result of ligand desorption and increased exposure of the metal surface, with ligand desorption eventually leading to precipitation and significantly decreased activity.
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Mourdikoudis, S., Menelaou, M., Fiuza-Maneiro, N., Zheng, G., Wei, S., Pérez-Juste, J., Polavarapu, L., & Sofer, Z. (2022) · Nanoscale Horizons · doi:10.1039/d2nh00111j · Cited by 259
Metadata
- Authors
- Stowell, C. A., & Korgel, B. A.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-06-02
- Volume
- 5
- Issue
- 7
- Pages
- 1203-1207
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2080594557
- Cited by
- 164
- References
- 0
- FWCI
- 6.35
- Type
- journal article
- Language
- en
- Open access
- closed
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