Self-assembly of noble metal monolayers on transition metal carbide nanoparticle catalysts
Name
Hunt_Manuscript with supplementary files.pdf
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10.1 MB
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Checksum (MD5)
d6890e35b3d53d1c3a8c6be175bc7346
Author(s)
Alba-Rubio, A. C.
Dumesic, J. A.
Hunt, Sean T.
Milina, Maria
Hendon, Christopher
Roman-Leshkov, Yuriy
Date Issued
May 2016
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Hunt, S. T., M. Milina, A. C. Alba-Rubio, C. H. Hendon, J. A. Dumesic, and Y. Roman-Leshkov. “Self-Assembly of Noble Metal Monolayers on Transition Metal Carbide Nanoparticle Catalysts.” Science 352, no. 6288 (May 19, 2016): 974–978.
Version
Author's final manuscript
Abstract
We demonstrated the self-assembly of transition metal carbide nanoparticles coated with atomically thin noble metal monolayers by carburizing mixtures of noble metal salts and transition metal oxides encapsulated in removable silica templates. This approach allows for control of the final core-shell architecture, including particle size, monolayer coverage, and heterometallic composition. Carbon-supported Ti[subscript 0.1]W[subscript 0.9]C nanoparticles coated with Pt or bimetallic PtRu monolayers exhibited enhanced resistance to sintering and CO poisoning, achieving an order of magnitude increase in specific activity over commercial catalysts for methanol electrooxidation after 10,000 cycles. These core-shell materials provide a new direction to reduce the loading, enhance the activity, and increase the stability of noble metal catalysts.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
https://doi.org/10.1126/science.aad8471
