Abstract
Pt rare earth compounds have recently been investigated as potential substitutes. In this study, the hydrogen reduction method was used to prepare the Pt-Dy bimetallic catalyst, and a number of characterizations were conducted for structure and morphological research. The high resolution-transmission electron microscopy (HR-TEM) and X-ray diffraction results show that Pt-Dy composite material exists in the form of various alloys and has a clear spherical shape. The majority of the metals in the composite catalyst appear in the zero valent state, and the binding energy of Pt shifts significantly, according to an X-ray photoelectron spectroscopy measurement. Impressively, Pt-Dy alloy produces excellent mass activity of 594 A/g compared to commercial Pt/C catalyst (162.8 A/g) for oxygen reduction process. Furthermore, after an accelerated durability test, the catalytic activity loss for Pt-Dy alloy catalyst reaches 20% while commercial Pt/C reduces 56%.
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