Direct propylene epoxidation via water activation over Pd-Pt electrocatalysts
Name
2341589.pdf
Description
Accepted version
Size
3.53 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Chung, Minju
Maalouf, Joseph H
Adams, Jason S
Jiang, Chenyu
Román-Leshkov, Yuriy
Manthiram, Karthish
Date Issued
January 4, 2024
Journal
Science
Publisher
American Association for the Advancement of Science
Citation
Minju Chung et al. ,Direct propylene epoxidation via water activation over Pd-Pt electrocatalysts. Science 383,49-55 (2024).
Version
Author's final manuscript
Abstract
Direct electrochemical propylene epoxidation by means of water-oxidation intermediates presents a sustainable alternative to existing routes that involve hazardous chlorine or peroxide reagents. We report an oxidized palladium-platinum alloy catalyst (PdPtOx/C), which reaches a Faradaic efficiency of 66 ± 5% toward propylene epoxidation at 50 milliamperes per square centimeter at ambient temperature and pressure. Embedding platinum into the palladium oxide crystal structure stabilized oxidized platinum species, resulting in improved catalyst performance. The reaction kinetics suggest that epoxidation on PdPtOx/C proceeds through electrophilic attack by metal-bound peroxo intermediates. This work demonstrates an effective strategy for selective electrochemical oxygen-atom transfer from water, without mediators, for diverse oxygenation reactions.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-ShareAlike
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DOI of Published Version
https://doi.org/10.1126/science.adh4355
