Electrocatalytic Properties of Carbon Nanofiber Web–Supported Nanocrystalline Pt Catalyst as Applied to Direct Methanol Fuel Cell

• Published in: International journal of electrochemical science Vol. 4; no. 11; pp. 1548 - 1559
• Main Authors: Kim, Y.I., Soundararajan, D., Park, C.W., Kim, S.H., Park, J.H., Ko, J.M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2009
• Subjects: catalytic activity; cathodic electrodeposition; Nanocrystalline Pt catalysts, CNF; cathodic electrodeposition; catalytic activity; Nanocrystalline Pt catalysts, CNF
• ISSN: 1452-3981; 1452-3981
• DOI: 10.1016/S1452-3981(23)15244-8

Carbon nanofibers (CNFs) web supported platinium nanoparticles were prepared by an electrochemical deposition method at sweep times of 5, 10, 20 and 40. Structure, composition and surface morphology of Pt incorporated CNF were analyzed by using X-ray diffraction (XRD), Energy dispersive x-ray spectroscopy (EDX), Field emission scanning electron microscopy (FE-SEM) and High resolution transmission electron microscopy (HR-TEM) techniques. Structural analysis by XRD showed face centered cubic crystal structure of Pt. Particle size and loading level (wt%) of Pt were found to increase from 10.7 to 18.6 nm and 3.3 to 7.0 6%, respectively with the increase of sweep times. SEM images showed that the Pt nano particles were agglomerated and effectively adhered on CNF with increase of sweep times. Nanocrystalline Pt and its FCC structure were also confirmed by using HR-TEM. Electrocatalytic activity of the nano Pt/CNF composite was demonstrated by linear voltammetrty, cyclic voltammetry and impedance spectra. The results showed increment in catalytic activity with the increase of sweep time.