Article ID Journal Published Year Pages File Type
62046 Journal of Catalysis 2009 5 Pages PDF
Abstract

The epoxidation of propylene with H2–O2 mixtures was studied over a gold catalyst supported on a Ge-modified TS-1 catalyst at 170 °C. Shifts of X-ray diffraction lines to lower angle showed that the Ge was incorporated into the structure of the TS-1. The presence of Ge more than doubled the conversion from 1.6% to 4% while increasing selectivity from 87% to 91%. Density functional theory calculations indicated that the origin of the enhanced activity was a ligand effect of Ge on Ti, which lowered the activation energy for the critical epoxidation step.

Graphical abstractGold supported on a Ge-modified TS-1 was active for propylene epoxidation, due to a ligand effect of Ge on Ti, which lowered the activation energy for the critical epoxidation step.Figure optionsDownload full-size imageDownload high-quality image (51 K)Download as PowerPoint slide

Related Topics
Physical Sciences and Engineering Chemical Engineering Catalysis
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