Gold nanoparticles supported on hydrous tin-oxide (Au-SnOx) are active for the four-electron oxygen reduction reaction in an acid electrolyte. The unique electrocatalytic of the Au-SnO is confirmed by the low amount of peroxide detected with rotating ring-disk electrode voltammetry and Koutecky-Levich analysis. In comparison, 10 wt % Au supported on Vulcan carbon and SnOx catalysts both produce significant peroxide in the acid electrolyte, indicating only a two-electron reduction reaction. Characterization of the Au-SnOx catalyst reveals a high-surface area, amorphous support with 1.7 nm gold metal particles. The high catalytic activity of the Au-SnO is attributed to metal support interactions. The results demonstrate a possible path to non-Pt catalysts for proton exchange membrane fuel cell cathodes
CITATION STYLE
Baker, W. S., Pietron, J. J., Teliska, M. E., Bouwman, P. J., Ramaker, D. E., & Swider-Lyons, K. E. (2006). Enhanced Oxygen Reduction Activity in Acid by Tin-Oxide Supported Au Nanoparticle Catalysts. Journal of The Electrochemical Society, 153(9), A1702. https://doi.org/10.1149/1.2216527
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