Tuning Pt-Cu nanostructures by bromide ions and their superior electrocatalytic activities for methanol oxidation reaction

摘要

Dendritic Pt-Cu nanoparticles were synthesized by a facile one-step method with the help of surfactant Brij58 at room temperature, and we also studied the effects of different Pt-Cu ratios on the morphology and size of nanoparticles. In addition, we further tuned the morphology of the Pt-Cu nanostructures by introducing bromide ions, eventually leading to the appearance of some tripod-like structures. Compared with dendritic Pt-Cu and commercial Pt black, these tripod-like Pt-Cu nanostructures exhibited higher electrocatalytic activity and CO tolerance for catalyzing methanol oxidation.