Cyclohexene and 1,4-Cyclohexadiene Hydrogenation Occur through Mutually Exclusive Intermediate Pathways on Platinum Nanoparticles

James M. Krier; Kyriakos Komvopoulos; Gabor A. Somorjai

doi:10.1021/acs.jpcc.6b01615

Cyclohexene and 1,4-Cyclohexadiene Hydrogenation Occur through Mutually Exclusive Intermediate Pathways on Platinum Nanoparticles

James M. Krier, Kyriakos Komvopoulos, Gabor A. Somorjai

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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)
Pages (from-to)	8246-8250
Number of pages	5
Journal	JOURNAL OF PHYSICAL CHEMISTRY C
Volume	120
Issue number	15
DOIs	https://doi.org/10.1021/acs.jpcc.6b01615
State	Published - Mar 31 2016
Externally published	Yes

Bibliographical note

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.

ASJC Scopus subject areas

Surfaces, Coatings and Films
General Energy
Physical and Theoretical Chemistry
Electronic, Optical and Magnetic Materials

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title = "Cyclohexene and 1,4-Cyclohexadiene Hydrogenation Occur through Mutually Exclusive Intermediate Pathways on Platinum Nanoparticles",

abstract = "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.",

author = "Krier, {James M.} and Kyriakos Komvopoulos and Somorjai, {Gabor A.}",

note = "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.",

year = "2016",

month = mar,

day = "31",

doi = "10.1021/acs.jpcc.6b01615",

language = "English (US)",

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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.

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U2 - 10.1021/acs.jpcc.6b01615

DO - 10.1021/acs.jpcc.6b01615

M3 - Article

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VL - 120

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JO - JOURNAL OF PHYSICAL CHEMISTRY C

JF - JOURNAL OF PHYSICAL CHEMISTRY C

IS - 15

ER -

Cyclohexene and 1,4-Cyclohexadiene Hydrogenation Occur through Mutually Exclusive Intermediate Pathways on Platinum Nanoparticles

Abstract

Bibliographical note

ASJC Scopus subject areas

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