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Mo oxide modified catalysts for direct methanol, formaldehyde and formic acid fuel cells

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Abstract

Pt black and PtRu black fuel cell anodes have been modified with Mo oxide and evaluated in direct methanol, formaldehyde and formic acid fuel cells. Mo oxide deposition by reductive electrodeposition from sodium molybdate or by spraying of the fuel cell anode with aqueous sodium molybdate resulted in similar performance gains in formaldehyde cells. At current densities below ca. 20 mA cm−2, cell voltages were 350–450 mV higher when the Pt catalyst was modified with Mo oxide, but these performance gains decreased sharply at higher current densities. For PtRu, voltage gains of up to 125 mV were observed. Modification of Pt and PtRu back catalysts with Mo oxide also significantly improved their activities in direct formic acid cells, but performances in direct methanol fuel cells were decreased.

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Acknowledgement

This work was supported by a Natural Sciences and Engineering Research Council of Canada (NSERC) Strategic Projects Grant, by Memorial University and by H Power Corp.

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Authors and Affiliations

  1. Department of Chemistry, Memorial University of Newfoundland, St. John’s, Newfoundland, Canada, A1B 3X7

    Chaojie Song, Mohammad Khanfar & Peter G. Pickup

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  1. Chaojie Song
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  2. Mohammad Khanfar
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  3. Peter G. Pickup
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Correspondence to Peter G. Pickup.

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Song, C., Khanfar, M. & Pickup, P.G. Mo oxide modified catalysts for direct methanol, formaldehyde and formic acid fuel cells. J Appl Electrochem 36, 339–345 (2006). https://doi.org/10.1007/s10800-005-9071-1

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  • DOI: https://doi.org/10.1007/s10800-005-9071-1

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