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AuthorXiong, Wen
AuthorMehrabadi, Bahareh A.T.
AuthorKarakolos, Stavros G.
AuthorWhite, Rembert D.
AuthorShakouri, Abolfazl
AuthorKasak, Peter
AuthorZaidi, Syed J.
AuthorWeidner, John W.
AuthorRegalbuto, John R.
AuthorColon-Mercado, Hector
AuthorMonnier, John R.
Available date2023-07-12T12:44:30Z
Publication Date2020-06-22
Publication NameACS Applied Energy Materials
Identifierhttp://dx.doi.org/10.1021/acsaem.0c00477
CitationXiong, W., Mehrabadi, B. A., Karakolos, S. G., White, R. D., Shakouri, A., Kasak, P., ... & Monnier, J. R. (2020). Enhanced performance of oxygen-functionalized multiwalled carbon nanotubes as support for Pt and Pt–Ru bimetallic catalysts for methanol electrooxidation. ACS Applied Energy Materials, 3(6), 5487-5496.‏
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85087764837&origin=inward
URIhttp://hdl.handle.net/10576/45479
AbstractThe performance of Pt-Ru catalysts for methanol electrooxidation has been greatly enhanced by replacing the standard carbon XC72 support with oxygen-functionalized multiwalled carbon nanotubes (MWCNTs). Highly dispersed, intimately contacted Pt-Ru nanoparticles were synthesized on MWNT supports by a combination of strong electrostatic adsorption (SEA) and electroless deposition (ED) methods. The catalysts have been characterized by X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), chemisorption, and X-ray photoelectron spectroscopy (XPS) and evaluated by cyclic voltammetry (CV) for the methanol electrooxidation reaction. The results showed that oxygen-functionalized MWCNTs not only influenced the chemical nature and morphology of the surfaces relative to XC72 but also enhanced the electrocatalytic properties of the resulting Pt and Pt-Ru electrocatalysts. STEM images revealed homogeneous dispersion of uniformly sized nanoparticles (NPs) for the two types of functionalized MWCNTs with relatively high particle density and no notable aggregation. The results also showed that the activities of Pt-Ru on functionalized MWCNT catalysts prepared by SEA and ED for methanol oxidation were much higher than those for commercial catalysts. The activities of-OH- A nd-COOH-terminated Pt-Ru/MWCNT-OH and Pt-Ru/MWCNT-COOH catalysts for methanol oxidation were up to 7 times higher than that for commercial Pt/XC72 and up to 4 times higher than that for a commercial Pt-Ru/XC72 catalyst with a 1:1 = Pt/Ru bulk atomic ratio.
SponsorThis work was funded by the University of South Carolina Aspire Grant (15510-E433) and NPRP grant # 9-219-2-105 from the Qatar National Research Fund (A Member of The Qatar Foundation). The findings achieved herein are solely the responsibility of the authors.
Languageen
PublisherAmerican Chemical Society
Subjectbimetallic catalysts
electroless deposition (ED)
methanol oxidation
multiwalled carbon nanotubes (MWCNTs)
strong electrostatic adsorption (SEA)
TitleEnhanced Performance of Oxygen-Functionalized Multiwalled Carbon Nanotubes as Support for Pt and Pt-Ru Bimetallic Catalysts for Methanol Electrooxidation
TypeArticle
Pagination5487-5496
Issue Number6
Volume Number3


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