Alosime EM. A review on surface functionalization of carbon nanotubes: methods and applications.
NANOSCALE RESEARCH LETTERS 2023;
18:12. [PMID:
36779998 DOI:
10.1186/s11671-023-03789-6]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 12/26/2022] [Indexed: 05/24/2023]
Abstract
In this review, the radiolytic and physical methods that can be used for the functionalization of carbon nanotubes (CNTs) and their applications as a support for fuel cell electrodes are described. Alloy nanoparticles have also been examined. For example, Pt-Ru nanoparticles were deposited onto a functionalized multiwalled carbon nanotube (MWNT) composite by reducing metal ions (e.g., Pt4+ and Ru3+) here using γ-irradiation and, hence, creating Pt-Ru/MWNT catalysts. The morphology, size, and composition of these Pt-Ru/MWNT catalysts were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), and elemental analysis, respectively. The efficiency of the Pt-Ru/MWNT catalyst was examined for use in the oxidation of carbon monoxide (CO) and methanol. The results of stripping voltammetry for the adsorbed CO on the Pt-Ru/MWNT catalyst electrodes indicated that CO oxidation was energetically favorable at these electrodes. Thus, Pt-Ru/MWNT catalysts were found to be suitable for electrode assembly in direct methanol fuel cells.
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