Sum Frequency Generation Studies of Hydrogenation Reactions on Platinum Nanoparticles
- Univ. of California, Berkeley, CA (United States)
Sum Frequency Generation (SFG) vibrational spectroscopy is used to characterize intermediate species of hydrogenation reactions on the surface of platinum nanoparticle catalysts. In contrast to other spectroscopy techniques which operate in ultra-high vacuum or probe surface species after reaction, SFG collects information under normal conditions as the reaction is taking place. Several systems have been studied previously using SFG on single crystals, notably alkene hydrogenation on Pt(111). In this thesis, many aspects of SFG experiments on colloidal nanoparticles are explored for the first time. To address spectral interference by the capping agent (PVP), three procedures are proposed: UV cleaning, H2 induced disordering and calcination (core-shell nanoparticles). UV cleaning and calcination physically destroy organic capping while disordering reduces SFG signal through a reversible structural change by PVP.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1165014
- Report Number(s):
- LBNL-6474E
- Resource Relation:
- Related Information: Designation of Academic Dissertation: University of California, Berkeley; Academic Degree: Ph.D. in Chemistry; Name of Academic Institution: University of California, Berkeley
- Country of Publication:
- United States
- Language:
- English
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