Synthesis and Oxygen Reduction Reaction Activity of Atomic and Nanoparticle Gold on Thiol-Functionalized Multiwall Carbon Nanotubes
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Shao-Horn_Synthesis and oxygen.pdf
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1.4 MB
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Author(s)
Kim, Junhyung
Lee, Seung Woo
Chen, Shuo
Shao-Horn, Yang
Date Issued
July 2011
Journal
Electrochemical and Solid-State Letters
Publisher
Electrochemical Society
Citation
Kim, Junhyung, Seung Woo Lee, Shuo Chen, and Yang Shao-Horn. Synthesis and Oxygen Reduction Reaction Activity of Atomic and Nanoparticle Gold on Thiol-Functionalized Multiwall Carbon Nanotubes. Electrochemical and Solid-State Letters 14, no. 10 (2011): B105. Copyright © 2011 by ECS -- The Electrochemical Society
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Final published version
Abstract
We demonstrated the self-assembly of atomic Au on thiol-functionalized multiwall carbon nanotubes through covalent bonding and the formation of Au nanoparticles (NPs) upon a subsequent thermal treatment. Au NPs of 3.4 nm were found to exhibit higher ORR activity than that of 1.9 nm, which can be attributed to removal of thiols from Au NP surfaces. This hypothesis is supported by decreasing intrinsic ORR activity with increasing alkanethiol-coverage on polycrystalline-Au. The understanding on top of the novel synthetic route has led to the development of Au NPs less than 5 nm with the highest ORR activity reported to date.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Electrochemical Energy Laboratory
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DOI of Published Version
https://doi.org/10.1149/1.3612270
