کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1286168 | 973179 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation, characterization of ZrOxNy/C and its application in PEMFC as an electrocatalyst for oxygen reduction Preparation, characterization of ZrOxNy/C and its application in PEMFC as an electrocatalyst for oxygen reduction](/preview/png/1286168.png)
In this paper, a noble-metal-free electrocatalyst based on carbon-supported zirconium oxynitride (ZrOxNy/C) was prepared by ammonolysis of carbon-supported zirconia (ZrO2/C) at 950 °C and investigated as cathode electrocatalyst towards oxygen reduction reaction (ORR) in PEMFCs. The electrocatalyst was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) techniques. The catalytic activity of the catalyst towards ORR was investigated by using the rotating disk electrode (RDE) technique in an O2-saturated 0.5 M H2SO4 solution. The ZrOxNy/C electrocatalyst presented attractive catalytic activity for ORR. The onset potential of ZrOxNy/C electrocatalyst for oxygen reduction was 0.7 V versus RHE and the four-electron pathway for the ORR was achieved on the surface of ZrOxNy/C electrocatalyst. The ZrOxNy/C electrocatalyst showed a comparatively good cell performance to ORR in PEMFCs, especially when operated at a comparatively high temperature.
Journal: Journal of Power Sources - Volume 172, Issue 2, 25 October 2007, Pages 503–510