Journal
NANOSCALE
Volume 12, Issue 15, Pages 8519-8524Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr00920b
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Funding
- NSF [CHE-1808239]
- National High Magnetic Field Laboratory's User Collaborative Grant Program - National Science Foundation Cooperative Agreement [DMR-1644779*]
- State of Florida
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences [DE-AC02-06CH11357]
- U Chicago Argonne, LLC
- U.S. DOE [DE-AC02-06CH11357]
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The molecular basis for the high cis-alkene selectivity over intermetallic PtSn for alkyne semi-hydrogenation is demonstrated. Unlike the universal assumption that the bimetallic surface is saturated with atomic hydrogen, molecular hydrogen has a higher barrier for dissociative adsorption on intermetallic PtSn due to the deficiency of Pt three-fold sites. The resulting molecular behavior of adsorbed hydrogen on intermetallic PtSn nanoparticles leads to pairwise-hydrogenation of three alkynes to the corresponding cis-alkenes, satisfying both high stereoselectivity and high chemoselectivity.
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