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Supported PtSn Bimetallic Catalyst for Oxidation of 1,6-Hexanediol487 views
Author
Xie, Jiahan, Chemical Engineering - School of Engineering and Applied Science, University of Virginia0000-0003-1754-9844
Advisors
Davis, Robert, Department of Chemical Engineering, University of Virginia
Abstract
A series of carbon-supported bimetallic PtSn catalysts having various Pt/Sn molar ratios was prepared and tested in the oxidation of 1,6-hexanediol with 1 MPa dioxygen at 343 K in aqueous solvent. The PtSn/C catalysts, which were initially reduced with sodium borohydride, did not produce Pt-Sn alloy particles. Instead, the catalysts were composed of SnOx moieties that were well-dispersed on the surfaces of the carbon support and the Pt nanoparticles. Subsequent treatment in H2 at 673 K induced Pt-Sn alloy formation. Whereas addition of SnOx to the Pt nanoparticles promoted the initial 1,6-hexanediol oxidation rate by 39%, the formation of Pt-Sn alloy particles decreased the initial rate. Under 1,6-hexanediol oxidation conditions, however, the Pt-Sn alloy phase separated, leading to the recovery of the catalytic activity. No significant change of product distribution was observed on bimetallic PtSn catalysts, regardless of the composition and structure.
Degree
MS (Master of Science)
Language
English
Rights
All rights reserved (no additional license for public reuse)
Xie, Jiahan. Supported PtSn Bimetallic Catalyst for Oxidation of 1,6-Hexanediol. University of Virginia, Chemical Engineering - School of Engineering and Applied Science, MS (Master of Science), 2015-11-19, https://doi.org/10.18130/V3SH5H.
