TY - JOUR
T1 - Cyclohexene and 1,4-Cyclohexadiene Hydrogenation Occur through Mutually Exclusive Intermediate Pathways on Platinum Nanoparticles
AU - Krier, James M.
AU - Komvopoulos, Kyriakos
AU - Somorjai, Gabor A.
N1 - KAUST 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.
PY - 2016/3/31
Y1 - 2016/3/31
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/678343
UR - https://pubs.acs.org/doi/10.1021/acs.jpcc.6b01615
UR - http://www.scopus.com/inward/record.url?scp=84966344007&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.6b01615
DO - 10.1021/acs.jpcc.6b01615
M3 - Article
SN - 1932-7447
VL - 120
SP - 8246
EP - 8250
JO - JOURNAL OF PHYSICAL CHEMISTRY C
JF - JOURNAL OF PHYSICAL CHEMISTRY C
IS - 15
ER -