通过水热法制备具有棒状结构的α-Fe2 O3,并在其表面用磷酸根离子修饰,将用磷酸根修饰过的α-Fe2 O3(Pi-Fe2 O3)用作光阳极可以在中性介质中稳定存在.通常情况下,α-Fe2 O3是在碱性条件下稳定存在的半导体,而将Pi-Fe2 O3作为光阳极用在葡萄糖燃料电池中,可以在中性条件下直接利用太阳能将生物质能转化为电能,这样不仅可以扩大α-Fe2 O3的使用范围,并且可以避免生物质氧化产生的CO2与电解液反应,保持了电池的效率.在Pi-Fe2O3表面担载助催化剂镍,可有效的将电流密度提高1.5倍.运用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外可见漫反射(UV-Vis)和电化学阻抗对样品进行结构和电化学性能进行表征,进一步证明,中性条件下修饰过的具有棒状结构的α-Fe2 O3在葡萄糖燃料电池的研究中有很大的应用价值.%The α-Fe2 O3 with rodlike structure was synthesized by hydrothermal method, and then the surface of the α-Fe2O3 was modified with the phosphate ions (Pi-Fe2O3) as photo anode, which can exist stably in the neutral conditions. Typically, the α-Fe2 O3 is a highly stable semiconductor in alka-line conditions. However, taking the Pi-Fe2O3 as photo anode in glucose fuel cell can directly convert biomass energy into electrical energy by using solar energy in a neutral condition, which can not only expand the use range of the α-Fe2 O3 , but also raw CO2 reaction with the electrolyte material oxidation can be avoided. Thus the battery performance can be maintained. Finally, the current density of the photo fuel cell is significantly enhanced 1.5 times by loading Ni-Pi on the surface of Pi-Fe2 O3. The structure and electrochemical performance of the sample were characterized by X ray diffraction ( XRD) , scanning electron microscopy ( SEM ) , UV-Vis Spectrophotometry ( UV-Vis ) and electro-chemical impedance spectroscopy (EIS). The results showed that the modified α-Fe2O3 with rodlike structure has great applied value in the research of glucose fuel cell under neutral conditions.
展开▼
