Platinum nanoparticles (NPs) capped with polyvinylpyrrolidone (PVP) were studied with sum frequency generation (SFG) vibrational spectroscopy under reaction conditions during cyclohexene (CH) and 1,4-cyclohexadiene (1,4-CHD) hydrogenation at 295 K. Despite similar vibrational features observed during reaction, CH and 1,4-CHD proceed through mutually exclusive pathways on 1.7 and 4.6 nm Pt-PVP NPs unlike Pt(111) studied previously. The intense red-shifted C-H stretch of adsorbed 1,4-CHD at 2770 cm-1 was monitored for both reactions. SFG and kinetic experiments show CH hydrogenation is active and reversible, while 1,4-CHD hydrogenation poisons the surface.
|Original language||English (US)|
|Number of pages||5|
|Journal||JOURNAL OF PHYSICAL CHEMISTRY C|
|State||Published - Mar 31 2016|
Bibliographical noteKAUST Repository Item: Exported on 2022-05-31
Acknowledgements: This work was supported by the Director, Office of Basic Energy Sciences, Materials Science and Engineering Division of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Partial funding for J.M.K. was also provided by the UCB-KAUST Academic Excellence Alliance (AEA) Program.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
ASJC Scopus subject areas
- Surfaces, Coatings and Films
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials