Abstract
A simple solvothermal method is employed to prepare a hollow conelike carbon (HCC) with an open hemline. The HCC was characterized by transmission electron microscopy, X-ray diffraction, sorption, Raman spectroscopy, and electrochemical techniques. Electrochemical characterizations show that activated HCC has improved corrosion resistance over Vulcan XC-72 carbon black. Platinum supported on this activated HCC was prepared and evaluated for methanol oxidation in acidic media for the first time. Pt/HCC electrocatalyst exhibits higher activity for methanol oxidation compared to at the same Pt loading. It is believed that open, hollow HCC acts as a structure unit and facilitates the mass diffusion and transfer inside the carbon cones due to larger orifices. The unique structure and higher corrosion resistance makes the Pt/HCC electrocatalyst a potential candidate to be used in direct methanol fuel cells.
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