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Fabricating a network structure is an efficient way to increase the electrocatalytic activity of a catalyst. In this study, a network-like structure of PtRuNi with rich grain boundaries characterized via scanning electron microscopy and transmission electron microscopy was prepared by an electrochemical dealloying process. For methanol oxidation, PtRuNi networks show an onset potential of 0.40 V with a mass activity of 220 mA mgPt -1 for methanol oxidation. The good catalytic activity of PtRuNi networks could be ascribed to the unique structure of a net framework with rich grain boundaries.

Rich-grain-boundary PtRuNi with network structure as efficient catalysts for methanol oxidation reaction