https://scholars.lib.ntu.edu.tw/handle/123456789/425102
Title: | Synthesis of PtNi alloy nanoparticles on graphene-based polymer nanohybrids for electrocatalytic oxidation of methanol | Authors: | Yung, Tung Yuan Liu, Ting Yu Wang, Kuan Syun Liu, Che Chun Wang, Shih Hsuan Chen, Po Tuan CHI-YANG CHAO |
Keywords: | Direct methanol fuel cells (DFMC) | Electrocatalyst | Graphene | Methanol oxidation reaction (MOR) | PtNi alloy nanoparticles | Issue Date: | 1-Dec-2016 | Publisher: | MDPI AG | Journal Volume: | 6 | Journal Issue: | 12 | Source: | Catalysts | Abstract: | © 2016 by the authors; licensee MDPI, Basel, Switzerland. We have successfully produced bimetallic PtNi alloy nanoparticles on poly (diallyldimethylammonium chloride) (PDDA)-modified graphene nanosheets (PtNi/PDDA-G) by the “one-pot” hydrothermal method. The size of PtNi alloy nanoparticles is approximately 2-5 nm. The PDDA-modified graphene nanosheets (PDDA-G) provides an anchored site for metal precursors, hence, the PtNi nanoparticles could be easily bond on the PDDA-G substrate. PtNi alloy nanoparticles (2-5 nm) display a homogenous alloy phase embedded on the PDDA-G substrate, evaluated by Raman, X-ray diffractometer (XRD), thermal gravity analysis (TGA), electron surface chemical analysis (ESCA), and electron energy loss spectroscopy (EELS). The Pt/Ni ratio of PtNi alloy nanoparticles is ~1.7, examined by the energy dispersive spectroscopy (EDS) spectra of transmitting electron microscopy (EDS/TEM spectra) and mapping technique. The methanol electro-oxidation of PtNi/PDDA-G was evaluated by cyclic voltammetry (CV) in 0.5 M of H2SO4 and 0.5 M of CH3OH. Compared to Pt on carbon nanoparticles (Pt/C) and Pt on Graphene (Pt/G), the PtNi/PDDA-G exhibits the optimal electrochemical surface area (ECSA), methanol oxidation reaction (MOR) activity, and durability by chrono amperometry (CA) test, which can be a candidate for MOR in the electro-catalysis of direct methanol fuel cells (DMFC). |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/425102 | ISSN: | 2073-4344 | DOI: | https://api.elsevier.com/content/abstract/scopus_id/85008192101 10.3390/catal6120201 |
Appears in Collections: | 材料科學與工程學系 |
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catalysts-06-00201-v2.pdf | 3.28 MB | Adobe PDF | View/Open |
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