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Preparation of MoO3/Pt electrodes by electrodeposition for a direct methanol fuel cell

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Abstract

MoO3/Pt binary catalysts with various Mo/Pt ratios were prepared by an electrodeposition method for use as the anode in a direct methanol fuel cell. Pt was electrodeposited onto indium tin oxide (ITO) substrate, and then MoO3 was electrodeposited from an Mo-peroxo electrolyte on the top of Pt with different deposition times. The crystallinity of synthesized films was analyzed by X-ray diffraction (XRD), and the oxidation state of both the platinum and molybdenum were determined by X-ray photoelectron spectroscopy (XPS) analyses. Scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM/EDS) was employed to investigate the surface morphology and composition. The catalytic activity and stability for methanol oxidation were measured using cyclic voltammetry and chronoamperometry in a mixture of 0.5 M H2SO4 and 0.5 M CH3OH aqueous solution. Electrocatalytic activity for CO oxidation was also evaluated in a 0.5-M H2SO4 solution. The addition of a proper amount of MoO3 was found to significantly improve both the catalytic activity and stability for methanol oxidation.

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Acknowledgments

This work was supported by a grant from the Korea Institute of Energy and Resources Technology Evaluation and Planning (KETEP) funded by the Korean government (2008-N-BL-HM-E-02-0000).

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Authors and Affiliations

  1. Department of Chemical Engineering, Inha University, 253, Yonghyun-dong Nam-Gu, Incheon, 402-751, South Korea

    Ju-Kyung Shin, So Mi Jeong, Yongsug Tak & Sung-Hyeon Baeck

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  1. Ju-Kyung Shin
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  2. So Mi Jeong
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  3. Yongsug Tak
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  4. Sung-Hyeon Baeck
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Correspondence to Sung-Hyeon Baeck.

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Shin, JK., Jeong, S.M., Tak, Y. et al. Preparation of MoO3/Pt electrodes by electrodeposition for a direct methanol fuel cell. Res Chem Intermed 36, 715–724 (2010). https://doi.org/10.1007/s11164-010-0173-y

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