Influence of carbon source in the properties of Ni/Carbon prepared by hydrothermal carbonization and thermal treatment and used as supports for PtRu/C electrocatalysts

ABSTRACT In this work, Ni/Carbon hybrids were prepared in two steps (hydrothermal carbonization and thermal treatment at 900 °C under argon atmosphere) using different carbon souces: glucose, starch and cellulose. PtRu/C electrocatalysts were prepared by an alcohol-reduction process using the hybrids as support. The materials were characterized by energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), B.E.T isotherms, X-ray diffraction (XRD), transmission electron microscope (TEM) and cyclic voltammetry (CV) in acidic medium. The electro-oxidation of methanol was studied by chronoamperometry. The PtRu/C electrocatalyst prepared using the hybrid synthesized from cellulose showed an electroactivity slightly superior compared to other obtained materials.

摘要：本研究采用两步法（水热碳化及900℃氩气氛围下热处理）制备镍/碳（Ni/Carbon）杂化材料，所用碳源包括葡萄糖、淀粉与纤维素。以该杂化材料为载体，通过醇还原法制备PtRu/C电催化剂。采用能量色散X射线能谱（EDX）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）、BET等温线、X射线衍射（XRD）、透射电子显微镜（TEM）以及酸性介质中的循环伏安法（CV）对所制备的材料进行表征；通过计时电流法研究甲醇的电氧化过程。结果表明，以纤维素合成的杂化材料为载体制备的PtRu/C电催化剂，其电活性略优于其他所得材料。