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Electrochemical properties of carbon nanotube-supported metallic catalysts prepared by changing a sweep- or step-applied potential

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Abstract

The electrochemical deposition of Pt nanoparticles on carbon nanotube (CNTs) supports and their catalytic activities for an electro-oxidation were investigated. Pt catalysts of 4–12 nm average crystalline size were grown on supports by changing applied potential methods such as sweep-potential or step-potential. Electroplating of 24-min time by a step-applied potential was enough to obtain small crystalline-size 4.6-nm particles, resulting in good electrochemical activity. The catalysts’ loading contents could be controlled by increasing the deposition time. The crystalline sizes and structures of the Pt/support catalysts were analyzed using X-ray diffraction (XRD). The electrochemical properties of the Pt/support catalysts were studied according to their characteristic current–potential curves in a methanol solution. As a result, the electrochemical activity was increased by enlarging the plating time. The activity reached the maximum at 24 min and then decreased. The enhanced electroactivity for catalysts by step-potential methods could be explained by the changes of the crystalline size and crystalline structures of the catalysts.

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Acknowledgments

This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093655) and Pusan National University Research Grant, 2009.

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Authors and Affiliations

  1. Department of Chemistry, Inha University, 253, Nam-gu, Incheon, 402-751, South Korea

    Soo-Jin Park

  2. Department of Chemical and Biochemical Engineering, Pusan National University, San 30, Jangjeon-dong, Geumjeong-gu, Pusan, 609-735, South Korea

    Seok Kim

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  1. Soo-Jin Park
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  2. Seok Kim
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Correspondence to Seok Kim.

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Park, SJ., Kim, S. Electrochemical properties of carbon nanotube-supported metallic catalysts prepared by changing a sweep- or step-applied potential. Res Chem Intermed 36, 693–701 (2010). https://doi.org/10.1007/s11164-010-0171-0

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  • DOI: https://doi.org/10.1007/s11164-010-0171-0

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