Alexandria Digital Research Library

Elucidation of the Molecular Structure of an Alkane Dehydrogenation Component of the Tandem Alkane Metathesis Cycle

Author:
Sirianni, Joseph Paul
Degree Grantor:
University of California, Santa Barbara.Chemistry
Degree Supervisor:
Scott Susannah L
Place of Publication:
[Santa Barbara, Calif.]
Publisher:
University of California, Santa Barbara
Creation Date:
2012
Issued Date:
2012
Topics:
Inorganic chemistry, Chemistry, and Materials Science
Keywords:
Heterogeneous Catalysis
Alkane Dehydrogenation
Platinum Nanoparticles
Alkane Metathesis
Description:

Alkane metathesis is a potentially useful, industrially important catalytic cycle in which an alkane dehydrogenation catalyst and an olefin metathesis catalyst work, in tandem, to disproportionate saturated hydrocarbons. An alkane dehydrogenation catalyst of interest for this process is a Pt-based heterogeneous organometallic precursor for nanoparticle synthesis. Current catalysts in the tandem system suffer from low turnovers, as well as catalyst deactivation. The use of Pt(C5H9)2 supported on silica as a precursor for controlled formation of subnanometer particles is investigated. NMR, IR, DFT, and XAS spectroscopies, as well as elemental analysis were used to probe the structure of Pt(C5H9)2 after it is grafted to silica surface. The organoplatinum precursor has shown to undergo protonolysis on both pentenyl ligands forming a (≡SiO)2Pt(C5H10)2 surface site. XAS and TEM have also shown that small particles are formed after reduction in H2 gas.

Format:
Text
Collection(s):
UCSB electronic theses and dissertations
ARK:
ark:/13030/m5rj4k42
Merritt ARK:
ark:/13030/m5rj4k42
Rights:
Inc.icon only.dark In Copyright
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