PtRu alloy nanostructure electrodes for methanol electrooxidation

초록

In this work, PtRu nanostructure electrodes for methanol electrooxidation were electrodeposited by modulating an electrode potential. The PtRu nanostructures were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction method. To our surprise, it was found that as the electrode potential was increased, the spherical shape of electrode could be transformed into sharp tip formed by PtRu alloy nanoparticles. In particular, the PtRu nanostructure electrode electrodeposited at -0.6V showed an excellent catalytic activity for methanol electrooxidation due to both bifuctional mechanism and increased active surface area. (c) 2008 Elsevier B.V. All rights reserved.

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