Pt-Ni alloy nanoparticles supported on CNF as catalyst for direct ethanol fuel cells |
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| Authors: | D Soundararajan JH ParkKH Kim JM Ko |
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| Institution: | a Division of Applied Chemistry and Biotechnology, Hanbat National University, San 16-1, Duckmyung-dong, Yusong-gu, Daejeon 305-719, Republic of Korea
b Department of Physics, Yeungnam University, Gyeongsan, 712-749, Republic of Korea |
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| Abstract: | Carbon nanofiber (CNF) network supported Pt and Pt-Ni alloy nano particle catalysts were prepared by electrochemical deposition at different deposition cycles. Structure, composition and surface morphology of the Pt/CNF and Pt-Ni/CNF were analyzed using X-ray diffraction, Energy dispersive X-ray spectroscopy and field emission scanning electron microscopy. Structural analysis by XRD revealed a face centered cubic crystal structure for Pt and its alloy. SEM images have shown that the Pt-Ni nanoparticles distributed evenly on the CNF network. The electrocatalytic activity of the Pt/CNF and Pt-Ni/CNF electrodes was verified using an electrochemical linear voltammetrty (ELV), cyclic voltammetry (ECV) and electrochemical impedance spectroscopy (EIS) in an alkaline solution containing 1 M C2H5OH + 1 M KOH. The results show increased catalytic activity with enhancement of the Pt-Ni alloy formation. |
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| Keywords: | Nanostructured Pt-Ni Catalysts CNF Direct ethanol fuel cell |
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